Spatial patterns of nitrogen runoff from Chinese paddy fields
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- 作者：Xikang Houa ; Feng Zhoua ; zhouf@pku.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Adrain Leipb ; Bojie Fua ; Hui Yanga ; Yan Chenc ; Shuoshuo Gaoa ; Ziyin Shanga ; Lekuan Mac ; malk@caep.org.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Nrate ; Nitrogen (N) fertilizer application rate per unit sowing area ; γk ; coefficient for xk in R0 term ; RTN ; N loss only via surface runoff ; c ; intercept in R0 term ; RR ; RTN per unit N fertilizer additions ; ε ; model error ; R0 ; background N runoff ; U ; urea ; ΔRR ; change in RR per unit of incremental Nrate ; Mix ; mixture of various synthetic fertilizers ; RR0 ; initial value of RR without the impact of fertilization ; OS ; mixture of urea and manure ; xk ; environmental factors (soil attribute climates a
- 刊名：Agriculture, Ecosystems & Environment
- 出版年：2016
- 出版时间：1 September 2016
- 年：2016
- 卷：231
- 期：Complete
- 页码：246-254
- 全文大小：1623 K
文摘
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The relationship between nitrogen runoff and fertilizer additions is nonlinear.
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Precipitation and clay content explain a half of spatial variation of nitrogen runoff.
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Nitrogen runoff coefficient in 2008 were 6.8 ± 1.7%, 30% lower than linear model.
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The first National Pollution Census might underestimate nitrogen runoff in China.