Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen
Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urea...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Kuang, Wennong [verfasserIn] Gao, Xiaopeng [verfasserIn] Tenuta, Mario [verfasserIn] Gui, Dongwei [verfasserIn] Zeng, Fanjiang [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Biology and fertility of soils - Berlin : Springer, 1985, 55(2019), 2 vom: 05. Jan., Seite 97-107 |
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| Übergeordnetes Werk: |
volume:55 ; year:2019 ; number:2 ; day:05 ; month:01 ; pages:97-107 |
| Links: |
|---|
| DOI / URN: |
10.1007/s00374-018-01337-4 |
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| Katalog-ID: |
SPR004967739 |
|---|
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| 245 | 1 | 0 | |a Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen |
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| 520 | |a Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. | ||
| 650 | 4 | |a Denitrification |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a WFPS |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Deep placement |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Enhanced efficiency fertilizers |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a N |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a O concentration |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Emission factor |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Gao, Xiaopeng |e verfasserin |4 aut | |
| 700 | 1 | |a Tenuta, Mario |e verfasserin |4 aut | |
| 700 | 1 | |a Gui, Dongwei |e verfasserin |4 aut | |
| 700 | 1 | |a Zeng, Fanjiang |e verfasserin |4 aut | |
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10.1007/s00374-018-01337-4 doi (DE-627)SPR004967739 (SPR)s00374-018-01337-4-e DE-627 ger DE-627 rakwb eng 630 640 ASE 38.60 bkl 38.00 bkl 48.32 bkl Kuang, Wennong verfasserin aut Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. Denitrification (dpeaa)DE-He213 WFPS (dpeaa)DE-He213 Deep placement (dpeaa)DE-He213 Enhanced efficiency fertilizers (dpeaa)DE-He213 N (dpeaa)DE-He213 O concentration (dpeaa)DE-He213 Emission factor (dpeaa)DE-He213 Gao, Xiaopeng verfasserin aut Tenuta, Mario verfasserin aut Gui, Dongwei verfasserin aut Zeng, Fanjiang verfasserin aut Enthalten in Biology and fertility of soils Berlin : Springer, 1985 55(2019), 2 vom: 05. Jan., Seite 97-107 (DE-627)269015426 (DE-600)1473419-9 1432-0789 nnns volume:55 year:2019 number:2 day:05 month:01 pages:97-107 https://dx.doi.org/10.1007/s00374-018-01337-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GGO SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2360 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.60 ASE 38.00 ASE 48.32 ASE AR 55 2019 2 05 01 97-107 |
| spelling |
10.1007/s00374-018-01337-4 doi (DE-627)SPR004967739 (SPR)s00374-018-01337-4-e DE-627 ger DE-627 rakwb eng 630 640 ASE 38.60 bkl 38.00 bkl 48.32 bkl Kuang, Wennong verfasserin aut Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. Denitrification (dpeaa)DE-He213 WFPS (dpeaa)DE-He213 Deep placement (dpeaa)DE-He213 Enhanced efficiency fertilizers (dpeaa)DE-He213 N (dpeaa)DE-He213 O concentration (dpeaa)DE-He213 Emission factor (dpeaa)DE-He213 Gao, Xiaopeng verfasserin aut Tenuta, Mario verfasserin aut Gui, Dongwei verfasserin aut Zeng, Fanjiang verfasserin aut Enthalten in Biology and fertility of soils Berlin : Springer, 1985 55(2019), 2 vom: 05. Jan., Seite 97-107 (DE-627)269015426 (DE-600)1473419-9 1432-0789 nnns volume:55 year:2019 number:2 day:05 month:01 pages:97-107 https://dx.doi.org/10.1007/s00374-018-01337-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GGO SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2360 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.60 ASE 38.00 ASE 48.32 ASE AR 55 2019 2 05 01 97-107 |
| allfields_unstemmed |
10.1007/s00374-018-01337-4 doi (DE-627)SPR004967739 (SPR)s00374-018-01337-4-e DE-627 ger DE-627 rakwb eng 630 640 ASE 38.60 bkl 38.00 bkl 48.32 bkl Kuang, Wennong verfasserin aut Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. Denitrification (dpeaa)DE-He213 WFPS (dpeaa)DE-He213 Deep placement (dpeaa)DE-He213 Enhanced efficiency fertilizers (dpeaa)DE-He213 N (dpeaa)DE-He213 O concentration (dpeaa)DE-He213 Emission factor (dpeaa)DE-He213 Gao, Xiaopeng verfasserin aut Tenuta, Mario verfasserin aut Gui, Dongwei verfasserin aut Zeng, Fanjiang verfasserin aut Enthalten in Biology and fertility of soils Berlin : Springer, 1985 55(2019), 2 vom: 05. Jan., Seite 97-107 (DE-627)269015426 (DE-600)1473419-9 1432-0789 nnns volume:55 year:2019 number:2 day:05 month:01 pages:97-107 https://dx.doi.org/10.1007/s00374-018-01337-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GGO SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2360 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.60 ASE 38.00 ASE 48.32 ASE AR 55 2019 2 05 01 97-107 |
| allfieldsGer |
10.1007/s00374-018-01337-4 doi (DE-627)SPR004967739 (SPR)s00374-018-01337-4-e DE-627 ger DE-627 rakwb eng 630 640 ASE 38.60 bkl 38.00 bkl 48.32 bkl Kuang, Wennong verfasserin aut Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. Denitrification (dpeaa)DE-He213 WFPS (dpeaa)DE-He213 Deep placement (dpeaa)DE-He213 Enhanced efficiency fertilizers (dpeaa)DE-He213 N (dpeaa)DE-He213 O concentration (dpeaa)DE-He213 Emission factor (dpeaa)DE-He213 Gao, Xiaopeng verfasserin aut Tenuta, Mario verfasserin aut Gui, Dongwei verfasserin aut Zeng, Fanjiang verfasserin aut Enthalten in Biology and fertility of soils Berlin : Springer, 1985 55(2019), 2 vom: 05. Jan., Seite 97-107 (DE-627)269015426 (DE-600)1473419-9 1432-0789 nnns volume:55 year:2019 number:2 day:05 month:01 pages:97-107 https://dx.doi.org/10.1007/s00374-018-01337-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GGO SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2360 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.60 ASE 38.00 ASE 48.32 ASE AR 55 2019 2 05 01 97-107 |
| allfieldsSound |
10.1007/s00374-018-01337-4 doi (DE-627)SPR004967739 (SPR)s00374-018-01337-4-e DE-627 ger DE-627 rakwb eng 630 640 ASE 38.60 bkl 38.00 bkl 48.32 bkl Kuang, Wennong verfasserin aut Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. Denitrification (dpeaa)DE-He213 WFPS (dpeaa)DE-He213 Deep placement (dpeaa)DE-He213 Enhanced efficiency fertilizers (dpeaa)DE-He213 N (dpeaa)DE-He213 O concentration (dpeaa)DE-He213 Emission factor (dpeaa)DE-He213 Gao, Xiaopeng verfasserin aut Tenuta, Mario verfasserin aut Gui, Dongwei verfasserin aut Zeng, Fanjiang verfasserin aut Enthalten in Biology and fertility of soils Berlin : Springer, 1985 55(2019), 2 vom: 05. Jan., Seite 97-107 (DE-627)269015426 (DE-600)1473419-9 1432-0789 nnns volume:55 year:2019 number:2 day:05 month:01 pages:97-107 https://dx.doi.org/10.1007/s00374-018-01337-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-GGO SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2360 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.60 ASE 38.00 ASE 48.32 ASE AR 55 2019 2 05 01 97-107 |
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English |
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Enthalten in Biology and fertility of soils 55(2019), 2 vom: 05. Jan., Seite 97-107 volume:55 year:2019 number:2 day:05 month:01 pages:97-107 |
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Enthalten in Biology and fertility of soils 55(2019), 2 vom: 05. Jan., Seite 97-107 volume:55 year:2019 number:2 day:05 month:01 pages:97-107 |
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Article |
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findex.gbv.de |
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Denitrification WFPS Deep placement Enhanced efficiency fertilizers N O concentration Emission factor |
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630 |
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Biology and fertility of soils |
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Kuang, Wennong @@aut@@ Gao, Xiaopeng @@aut@@ Tenuta, Mario @@aut@@ Gui, Dongwei @@aut@@ Zeng, Fanjiang @@aut@@ |
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2019-01-05T00:00:00Z |
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SPR004967739 |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR004967739</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20220110180118.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201001s2019 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s00374-018-01337-4</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR004967739</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s00374-018-01337-4-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">630</subfield><subfield code="a">640</subfield><subfield code="q">ASE</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">38.60</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">38.00</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">48.32</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Kuang, Wennong</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2019</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Denitrification</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">WFPS</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Deep placement</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Enhanced efficiency fertilizers</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">N</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">O concentration</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Emission factor</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gao, Xiaopeng</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Tenuta, Mario</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gui, Dongwei</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zeng, Fanjiang</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Biology and fertility of soils</subfield><subfield code="d">Berlin : Springer, 1985</subfield><subfield code="g">55(2019), 2 vom: 05. 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|
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Kuang, Wennong |
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Kuang, Wennong ddc 630 bkl 38.60 bkl 38.00 bkl 48.32 misc Denitrification misc WFPS misc Deep placement misc Enhanced efficiency fertilizers misc N misc O concentration misc Emission factor Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen |
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Kuang, Wennong |
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630 640 ASE 38.60 bkl 38.00 bkl 48.32 bkl Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen Denitrification (dpeaa)DE-He213 WFPS (dpeaa)DE-He213 Deep placement (dpeaa)DE-He213 Enhanced efficiency fertilizers (dpeaa)DE-He213 N (dpeaa)DE-He213 O concentration (dpeaa)DE-He213 Emission factor (dpeaa)DE-He213 |
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ddc 630 bkl 38.60 bkl 38.00 bkl 48.32 misc Denitrification misc WFPS misc Deep placement misc Enhanced efficiency fertilizers misc N misc O concentration misc Emission factor |
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ddc 630 bkl 38.60 bkl 38.00 bkl 48.32 misc Denitrification misc WFPS misc Deep placement misc Enhanced efficiency fertilizers misc N misc O concentration misc Emission factor |
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ddc 630 bkl 38.60 bkl 38.00 bkl 48.32 misc Denitrification misc WFPS misc Deep placement misc Enhanced efficiency fertilizers misc N misc O concentration misc Emission factor |
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Biology and fertility of soils |
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630 - Agriculture 640 - Home & family management |
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Biology and fertility of soils |
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Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen |
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Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen |
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Kuang, Wennong |
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Biology and fertility of soils |
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Kuang, Wennong Gao, Xiaopeng Tenuta, Mario Gui, Dongwei Zeng, Fanjiang |
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relationship between soil profile accumulation and surface emission of $ n_{2} $o: effects of soil moisture and fertilizer nitrogen |
| title_auth |
Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen |
| abstract |
Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. |
| abstractGer |
Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. |
| abstract_unstemmed |
Abstract A soil column experiment was conducted to examine the effects of fertilizer N source and depth of placement on soil profile $ N_{2} $O accumulation and surface emissions at 44% and 77% water-filled pore space (WFPS). The used N fertilizers were polymer-coated urea, stabilized urea with urease and nitrification inhibitors, and conventional granular urea. Conventional urea and stabilized urea were applied either uniformly at 0–65 cm or deeply at a 40- to 65-cm depth of 65 cm repacked soil columns, whereas polymer-coated urea was subsurface banded at a 10-cm depth to reflect fertilizer application practices at a field scale. Profile $ N_{2} $O concentrations at 5, 15, 30, and 60 cm and surface flux were monitored over 3 months. Compared to conventional urea, stabilized urea and polymer-coated urea generally reduced $ N_{2} $O accumulation in the column, but not cumulative emissions. Across fertilizer sources, compared with uniform addition, deep placement reduced column $ N_{2} $O accumulation at 44% but not at 77% WFPS. Deep placement also reduced emissions 56–71% than for uniform placement. Column $ N_{2} $O accumulation doubled at 77% than 44% WFPS, whereas cumulative emissions and applied N–based emission factors were lower at the former WFPS value. Cumulative $ N_{2} $O emissions increased exponentially with total accumulation at 44% but not 77% WFPS. Reduced $ N_{2} $O emissions at high WFPS were likely due to consumption and low diffusivity of the gas in the soil profile, rather than low production by denitrification. These results suggest fertilizer N leached down the profile is less prone to $ N_{2} $O loss while emission reductions by using more efficient fertilizers may be limited. |
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Relationship between soil profile accumulation and surface emission of $ N_{2} $O: effects of soil moisture and fertilizer nitrogen |
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| score |
7.4018908 |