Variation of Soil Organic Carbon and Its Major Constraints in East Central Asia

	Variation of Soil Organic Carbon and Its Major Constraints in East Central Asia
	Xinqing Lee; Yimin Huang; Daikuan Huang
	2016
发表期刊	Plos One
卷号	11 期号:3
摘要	Variation of soil organic carbon (SOC) and its major constraints in large spatial scale are critical for estimating global SOC inventory and projecting its future at environmental changes. By analyzing SOC and its environment at 210 sites in uncultivated land along a 3020km latitudinal transect in East Central Asia, we examined the effect of environmental factors on the dynamics of SOC. We found that SOC changes dramatically with the difference as high as 5 times in north China and 17 times in Mongolia. Regardless, C:N remains consistent about 12. Path analysis indicated that temperature is the dominant factor in the variation of SOC with a direct effect much higher than the indirect one, the former breaks SOC down the year round while the latter results in its growth mainly via precipitation in the winter half year. Precipitation helps accumulate SOC, a large part of the effect, however, is taken via temperature. NH4+-N and topography also affect SOC, their roles are played primarily via climatic factors. pH correlates significantly with SOC, the effect, however, is taken only in the winter months, contributing to the decay of SOC primarily via temperature. These factors explained as much as 79% of SOC variations, especially in the summer months, representing the major constraints on the SOC stock. Soil texture gets increasingly fine southward, it does not, however, constitute an apparent factor. Our results suggested that recent global warming should have been adversely affecting SOC stock in the mid-latitude as temperature dominates other factors as the constraint.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6152
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Xinqing Lee,Yimin Huang,Daikuan Huang. Variation of Soil Organic Carbon and Its Major Constraints in East Central Asia[J]. Plos One,2016,11(3).
APA	Xinqing Lee,Yimin Huang,&Daikuan Huang.(2016).Variation of Soil Organic Carbon and Its Major Constraints in East Central Asia.Plos One,11(3).
MLA	Xinqing Lee,et al."Variation of Soil Organic Carbon and Its Major Constraints in East Central Asia".Plos One 11.3(2016).

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