Quantifying nitrogen leaching response to fertilizer additions in   China&apos;s cropland

doi:10.1016/j.envpol.2016.01.010

CORC > 北京大学 > 城市与环境学院

	Quantifying nitrogen leaching response to fertilizer additions in China's cropland
	Gao, Shuoshuo ; Xu, Peng ; Zhou, Feng ; Yang, Hui ; Zheng, Chunmiao ; Cao, Wei ; Tao, Shu ; Piao, Shilong ; Zhao, Yue ; Ji, Xiaoyan ; Shang, Ziyin ; Chen, Minpeng
刊名	ENVIRONMENTAL POLLUTION
	2016
关键词	Nitrogen leaching Nonlinearity Variability Spatial pattern Bayesian inference N2O EMISSIONS NITRATE GROUNDWATER MODEL WATER LOSSES SOILS DENITRIFICATION CONTAMINATION LYSIMETER
DOI	10.1016/j.envpol.2016.01.010
英文摘要	Agricultural soils account for more than 50% of nitrogen leaching (L-N) to groundwater in China. When excess levels of nitrogen accumulate in groundwater, it poses a risk of adverse health effects. Despite this recognition, estimation of L-N from cropland soils in a broad spatial scale is still quite uncertain in China. The uncertainty of L-N primarily stems from the shape of nitrogen leaching response to fertilizer additions (N-rate) and the role of environmental conditions. On the basis of 453 site-years at 51 sites across China, we explored the nonlinearity and variability of the response of L-N to N-rate and developed an empirical statistical model to determine how environmental factors regulate the rate of N leaching (LR). The result shows that L-N-N-rate relationship is convex for most crop types, and varies by local hydro-climates and soil organic carbon. Variability of air temperature explains a half (similar to 52%) of the spatial variation of LR. The results of model calibration and validation indicate that incorporating this empirical knowledge into a predictive model could accurately capture the variation in leaching and produce a reasonable upscaling from site to country. The fertilizer-induced L-N in 2008 for China's cropland were 0.88 +/- 0.23 TgN (1 sigma), significantly lower than the linear or uniform model, as assumed by Food and Agriculture Organization and MITERRA-EUROPE models. These results also imply that future policy to reduce N leaching from cropland needs to consider environmental variability rather than solely attempt to reduce N-rate. (C) 2016 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [41201077, 71103186, 41561134016]; Research Fund for the Doctoral Program of Higher Education of China [20120001120129]; 111 Project [B14001]; SCI(E); EI; PubMed; ARTICLE; zhouf@pku.edu.cn; chenminpeng@caas.cn; 241-251; 211
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435376]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Gao, Shuoshuo,Xu, Peng,Zhou, Feng,et al. Quantifying nitrogen leaching response to fertilizer additions in China's cropland[J]. ENVIRONMENTAL POLLUTION,2016.
APA	Gao, Shuoshuo.,Xu, Peng.,Zhou, Feng.,Yang, Hui.,Zheng, Chunmiao.,...&Chen, Minpeng.(2016).Quantifying nitrogen leaching response to fertilizer additions in China's cropland.ENVIRONMENTAL POLLUTION.
MLA	Gao, Shuoshuo,et al."Quantifying nitrogen leaching response to fertilizer additions in China's cropland".ENVIRONMENTAL POLLUTION (2016).