干旱区生态环境知识资源中心(Arid): Effect of freeze-thaw processes on soil water transport of farmland in a semi-arid area

Arid

DOI	10.1016/j.agwat.2021.106876
	Effect of freeze-thaw processes on soil water transport of farmland in a semi-arid area
	Sun, Libo; Chang, Xiaomin; Yu, Xinxiao; Jia, Guodong; Chen, Lihua; Wang, Yusong; Liu, Ziqiang
通讯作者	Jia, GD (corresponding author), Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	252
英文摘要	Seasonal freeze-thaw processes affect soil water migration and distribution, especially in semi-arid agricultural areas. These processes play an important role in mitigating harsh environmental conditions and wind erosion. Soil water content (SWC) and soil temperature (ST) were monitored at different depths (0-2 m) and investigated under freeze-thaw conditions from November 2018 to May 2019 in a semi-arid agro-pastoral region of northern China. The initial SWC was the main factor that affected the freeze-thaw process. During the freeze-thaw process, differences in soil thermal conductivity caused the soil to thaw faster than the freezing process, and the upper soil layer (0-60 cm) was significantly affected by temperature changes. Changes in the potential energy of water and pore pressure gradient caused the migration of soil water to the upper layer, which led to a slight decrease in SWC in each layer before ST dropped to the freezing point. The vertical migration distance of soil water exceeded 70 cm, and the SWC above a depth of 100 cm increased significantly, as water was mainly obtained from the soil layer below a depth of 200 cm. Soil compaction was reduced when affected by freeze-thaw processes and the soil particles were more fragmented, leading to wind erosion and dust events. Our results partially explain the occurrence of wind erosion in spring and provide a scientific basis for predicting soil water status and appropriate farmland management strategies.
英文关键词	Farmland Semi-arid area Freeze-thaw process Soil water content (SWC) Soil temperature (ST)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000663329900011
WOS关键词	HYDROLOGIC CONTROLS ; NITROGEN CYCLES ; USE EFFICIENCY ; LOESS PLATEAU ; MOISTURE ; RUNOFF ; INFILTRATION ; TEMPERATURE ; IRRIGATION ; DYNAMICS
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349345
作者单位	[Sun, Libo; Chang, Xiaomin; Yu, Xinxiao; Jia, Guodong; Chen, Lihua; Wang, Yusong; Liu, Ziqiang] Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China; [Liu, Ziqiang] Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China
推荐引用方式 GB/T 7714	Sun, Libo,Chang, Xiaomin,Yu, Xinxiao,et al. Effect of freeze-thaw processes on soil water transport of farmland in a semi-arid area[J]. 北京林业大学,2021,252.
APA	Sun, Libo.,Chang, Xiaomin.,Yu, Xinxiao.,Jia, Guodong.,Chen, Lihua.,...&Liu, Ziqiang.(2021).Effect of freeze-thaw processes on soil water transport of farmland in a semi-arid area.AGRICULTURAL WATER MANAGEMENT,252.
MLA	Sun, Libo,et al."Effect of freeze-thaw processes on soil water transport of farmland in a semi-arid area".AGRICULTURAL WATER MANAGEMENT 252(2021).