气候变化领域集成服务门户(CCPortal): Disentangling the formation and evolvement mechanism of plants-induced dried soil layers on China's Loess Plateau

CCPortal

DOI	10.1016/j.agrformet.2019.02.011
	Disentangling the formation and evolvement mechanism of plants-induced dried soil layers on China's Loess Plateau
	Jia, Yuhua; Li, Tongchuan; Shao, Ming'an; Hao, Jianhui; Wang, Yunqiang; Jia, Xiaoxu; Zeng, Ceng; Fu, Xiaoli; Liu, Bingxia; Gan, Miao; Zhao, Mingyang; Ju, Xinni
通讯作者	Jia, YH (通讯作者)
发表日期	2019
ISSN	0168-1923
EISSN	1873-2240
起始页码	57
结束页码	70
卷号	269
英文摘要	The extent of the effect of China's Loess Plateau on global climate change partially depends on the achievements of the Grain for Green Program (GFGP). This region is prone to drought problems, especially the widespread creation of dried soil layer (DSL), which is intensified by the revegetation from GFGP initiatives. A DSL is the result of soil desiccation in deep soil profiles. The occurrence and expansion of DSLs are strengthened by the high risk of the Loess Plateau to climate change. On the basis of the 14-year data of soil water content (SWC) of four revegetation types on a loessial slope, we investigated the evolution processes and recovery possibility of DSL. Results showed that both variation trends and abrupt changes in the SWC time series were distinctly affected by revegetation. The 40 cm thickness of the DSL was triggered when Medicago sativa and Caragana korshinskii grew for 2 and 4 years, respectively. The downward extension depth of DSL reached 580 cm under the two plants above within 7 and 8 years of planting. However, the results suggested the possibility of DSL disappearance as shown by the formation depth dynamics of DSL, the fluctuation of DSL-SWC, and the phenomenon of sandwiched DSL. During deep moisture recharge and DSL recovery, although the SWC sensitivity to textural variation was present in the vertical profile, the effects of soil texture on SWC were decreased. Wet climate was linked to both DSL thinning and thickening. Thus, the effect of wet climate is bidirectional for DSL development, thereby highlighting the important role of revegetation. The results of this work enhance our understanding of DSL and may help alleviate the risk of drought in the Loess Plateau.
关键词	TEMPORAL STABILITY CLIMATE-CHANGE SPATIAL VARIABILITY WATER STORAGE VEGETATION MOISTURE DESICCATION RESPONSES DYNAMICS AFFORESTATION
英文关键词	Soil water resources; Soil drought; Revegetation; Gain for green program; Sandwiched dried soil layer
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000463120900006
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259630
推荐引用方式 GB/T 7714	Jia, Yuhua,Li, Tongchuan,Shao, Ming'an,et al. Disentangling the formation and evolvement mechanism of plants-induced dried soil layers on China's Loess Plateau[J]. 中国科学院青藏高原研究所,2019,269.
APA	Jia, Yuhua.,Li, Tongchuan.,Shao, Ming'an.,Hao, Jianhui.,Wang, Yunqiang.,...&Ju, Xinni.(2019).Disentangling the formation and evolvement mechanism of plants-induced dried soil layers on China's Loess Plateau.AGRICULTURAL AND FOREST METEOROLOGY,269.
MLA	Jia, Yuhua,et al."Disentangling the formation and evolvement mechanism of plants-induced dried soil layers on China's Loess Plateau".AGRICULTURAL AND FOREST METEOROLOGY 269(2019).