| Registro completo |
| Provedor de dados: |
NWISRL
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| País: |
United Kingdom
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| Título: |
Fifteen Years of Wheat Yield, N Uptake, and Soil Nitrate-N Dynamics in a Biosolids-Amended Agroecosystem. Agriculture, Ecosystems and Environment
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| Autores: |
Barbarick, K.A.
Ippolito, J.A.
McDaniel, J.P.
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| Data: |
2010-10-05
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| Ano: |
2010
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| Palavras-chave: |
Dryland crops
Small grain
Nitrogen
Soil quality
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| Resumo: |
Understanding N dynamics in biosolids-amended agroecosystems can help avoid over-application and the potential for environmental degradation. We investigated 15-years of biosolids application to dryland-wheat, questioning what is the relationship between cumulative grain yield and N uptake (N removal) and biosolids or N fertilizer rates and how many times biosolids or N fertilizer are applied? How are wheat-grain production and N uptake intertwined with residual soil nitrate-N? We found that biosolids or N fertilizer rates plus the number of applications of each material produced planar-regression (3-dimensional) models with 15-years of grain yield and N uptake data (all R2 > 0.93). To evaluate how yield or N uptake impacted residual soil nitrate-N, we completed linear regressions on yield, N uptake, and soil nitrate-N. We then correlated the slopes where P<0.10 for the yield and soil nitrate-N and the N uptake and soil nitrate-N. A significant negative relationship was found for biosolids application for each of these comparisons while the N fertilizer results were inconsistent. For the biosolids treatments, as yield or N uptake increased, residual soil nitrate-N decreased. Our findings show that planar regression models could aid biosolids beneficial-use management programs when considering agroecosystem N dynamics.
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| Tipo: |
Article
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| Identificador: |
http://eprints.nwisrl.ars.usda.gov/1404/1/1374.pdf
Barbarick, K.A. and Ippolito, J.A. and McDaniel, J.P. (2010) Fifteen Years of Wheat Yield, N Uptake, and Soil Nitrate-N Dynamics in a Biosolids-Amended Agroecosystem. Agriculture, Ecosystems and Environment. Agriculture, Ecosystems and Environment. 05 October 2010. pp. 116-120.
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| Relação: |
http://eprints.nwisrl.ars.usda.gov/1404/
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| Formato: |
application/pdf
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