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	Changes and controlling factors of cropland soil organic carbon in North China Plain over a 30-year period
	Han D. R.; Sun, Z. G.; Li, F. D.; Hou, R. X.; Li, J.; Ouyang, Z.; Li, B. B.; Cao, C. W.
	2016
关键词	Huang-Huai-Hai Plain Soil organic carbon change Spatiotemporal pattern C input Recommended management practices land-use change climate-change yellow-river water-resources food security hai plain sequestration agriculture saturation nitrogen
英文摘要	Try to detect the spatiotemporal dynamics and the controlling factors of soil organic carbon (SOC) in the North China Plain (NCP) over the last 30 years: 1980s-2010s. We investigated the SOC evolution by compiling data from 32 published papers during the last 30 years. Then we examined the spatial pattern and controlling factors by analysing a two-period sampling observations (1980s and 2010s) and multiple explanatory variables in four typical counties. Over the last 30 years, the agronomy environment and management practice have been dramatically improved, which have largely increased the crop yield and subsequently enhanced the C input into the soil, made NCP the most effective region for C sequestration in China, ranging from 5.55 +/- 1.28 g kg(-1) in the 1980s to 8.71 +/- 1.22 g kg(-1) in the 2010s, with an average rate of 0.11 g kg(-1) year(-1). The SOC change (SOCC) exhibited spatial heterogeneity due to imbalanced agricultural management (i.e., rotation and irrigation) and environmental obstacles (i.e., salinity and water deficit). The mean SOCC rate in Fengqiu and Yucheng (> +0.15 g kg(-1) year(-1), with rotation of winter wheat and summer maize, less water deficit and salinity stress) were significantly (P < 0.05) higher than that in Nanpi (< +0.10 g kg(-1) year(-1), with water deficit) and Kenli (< +0.10 g kg(-1) year(-1), cotton only, salinity stress). SOC may continue to increase in the NCP through sustainable and efficient agricultural management, especially in low-yield region. Soils in the NCP will still act as a C sink well in the future.
出处	Plant and Soil
卷	403
期	1-2
页	437-453
语种	英语
ISSN号	0032-079X
DOI标识	10.1007/s11104-016-2803-7
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42965]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Han D. R.,Sun, Z. G.,Li, F. D.,et al. Changes and controlling factors of cropland soil organic carbon in North China Plain over a 30-year period. 2016.

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