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Spatial variability and biophysicochemical controls on N2O emissions from differently tilled arable soils

(2011) BIOLOGY AND FERTILITY OF SOILS. 47(7). p.753-766
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Biotechnology for a sustainable economy (Bio-Economy)
Abstract
Nitrous oxide (N(2)O) emissions, soil microbial community structure, bulk density, total pore volume, total C and N, aggregate mean weight diameter and stability index were determined in arable soils under three different types of tillage: reduced tillage (RT), no tillage (NT) and conventional tillage (CT). Thirty intact soil cores, each in a 25 x 25-m(2) grid, were collected to a depth of 10 cm at the seedling stage of winter wheat in February 2008 from Maulde (50A degrees 3'aEuro parts per thousand N, 3A degrees 43'aEuro parts per thousand W), Belgium. Two additional soil samples adjacent to each soil core were taken to measure the spatial variance in biotic and physicochemical conditions. The microbial community structure was evaluated by means of phospholipid fatty acids analysis. Soil cores were amended with 15 kg NO (3) (-) -N ha(-1), 15 kg NH (4) (+) -N ha(-1) and 30 kg ha(-1) urea-N ha(-1) and then brought to 65% water-filled pore space and incubated for 21 days at 15A degrees C, with regular monitoring of N(2)O emissions. The N(2)O fluxes showed a log-normal distribution with mean coefficients of variance (CV) of 122%, 78% and 90% in RT, NT and CT, respectively, indicating a high spatial variation. However, this variability of N(2)O emissions did not show plot scale spatial dependence. The N(2)O emissions from RT were higher (p < 0.01) than from CT and NT. Multivariate analysis of soil properties showed that PC1 of principal component analysis had highest loadings for aggregate mean weight diameter, total C and fungi/bacteria ratio. Stepwise multiple regression based on soil properties explained 72% (p < 0.01) of the variance of N(2)O emissions. Spatial distributions of soil properties controlling N(2)O emissions were different in three different tillages with CV ranked as RT > CT > NT.
Keywords
Aggregate distribution, N(2)O emissions, Spatial heterogeneity, Denitrification, Microbial community structure, NITROUS-OXIDE EMISSIONS, GREENHOUSE-GAS EMISSIONS, AGRICULTURAL SOILS, NO-TILL, CONVENTIONAL TILLAGE, MICROBIAL COMMUNITY, RHIZOCTONIA-SOLANI, CROP RESIDUES, FATTY-ACIDS, CH4 FLUXES

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Citation

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Chicago
Jahangir, Mohammad Mofizur Rahman, Dries Roobroeck, Oswald Van Cleemput, and Pascal Boeckx. 2011. “Spatial Variability and Biophysicochemical Controls on N2O Emissions from Differently Tilled Arable Soils.” Biology and Fertility of Soils 47 (7): 753–766.
APA
Jahangir, M. M. R., Roobroeck, D., Van Cleemput, O., & Boeckx, P. (2011). Spatial variability and biophysicochemical controls on N2O emissions from differently tilled arable soils. BIOLOGY AND FERTILITY OF SOILS, 47(7), 753–766.
Vancouver
1.
Jahangir MMR, Roobroeck D, Van Cleemput O, Boeckx P. Spatial variability and biophysicochemical controls on N2O emissions from differently tilled arable soils. BIOLOGY AND FERTILITY OF SOILS. 2011;47(7):753–66.
MLA
Jahangir, Mohammad Mofizur Rahman, Dries Roobroeck, Oswald Van Cleemput, et al. “Spatial Variability and Biophysicochemical Controls on N2O Emissions from Differently Tilled Arable Soils.” BIOLOGY AND FERTILITY OF SOILS 47.7 (2011): 753–766. Print.
@article{2037858,
  abstract     = {Nitrous oxide (N(2)O) emissions, soil microbial community structure, bulk density, total pore volume, total C and N, aggregate mean weight diameter and stability index were determined in arable soils under three different types of tillage: reduced tillage (RT), no tillage (NT) and conventional tillage (CT). Thirty intact soil cores, each in a 25 x 25-m(2) grid, were collected to a depth of 10 cm at the seedling stage of winter wheat in February 2008 from Maulde (50A degrees 3'aEuro parts per thousand N, 3A degrees 43'aEuro parts per thousand W), Belgium. Two additional soil samples adjacent to each soil core were taken to measure the spatial variance in biotic and physicochemical conditions. The microbial community structure was evaluated by means of phospholipid fatty acids analysis. Soil cores were amended with 15 kg NO (3) (-) -N ha(-1), 15 kg NH (4) (+) -N ha(-1) and 30 kg ha(-1) urea-N ha(-1) and then brought to 65\% water-filled pore space and incubated for 21 days at 15A degrees C, with regular monitoring of N(2)O emissions. The N(2)O fluxes showed a log-normal distribution with mean coefficients of variance (CV) of 122\%, 78\% and 90\% in RT, NT and CT, respectively, indicating a high spatial variation. However, this variability of N(2)O emissions did not show plot scale spatial dependence. The N(2)O emissions from RT were higher (p {\textlangle} 0.01) than from CT and NT. Multivariate analysis of soil properties showed that PC1 of principal component analysis had highest loadings for aggregate mean weight diameter, total C and fungi/bacteria ratio. Stepwise multiple regression based on soil properties explained 72\% (p {\textlangle} 0.01) of the variance of N(2)O emissions. Spatial distributions of soil properties controlling N(2)O emissions were different in three different tillages with CV ranked as RT {\textrangle} CT {\textrangle} NT.},
  author       = {Jahangir, Mohammad Mofizur Rahman and Roobroeck, Dries and Van Cleemput, Oswald and Boeckx, Pascal},
  issn         = {0178-2762},
  journal      = {BIOLOGY AND FERTILITY OF SOILS},
  keyword      = {Aggregate distribution,N(2)O emissions,Spatial heterogeneity,Denitrification,Microbial community structure,NITROUS-OXIDE EMISSIONS,GREENHOUSE-GAS EMISSIONS,AGRICULTURAL SOILS,NO-TILL,CONVENTIONAL TILLAGE,MICROBIAL COMMUNITY,RHIZOCTONIA-SOLANI,CROP RESIDUES,FATTY-ACIDS,CH4 FLUXES},
  language     = {eng},
  number       = {7},
  pages        = {753--766},
  title        = {Spatial variability and biophysicochemical controls on N2O emissions from differently tilled arable soils},
  url          = {http://dx.doi.org/10.1007/s00374-011-0580-2},
  volume       = {47},
  year         = {2011},
}

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