干旱区生态环境知识资源中心(Arid): Evaluating the effects of layered soils on water flow, solute transport, and crop growth with a coupled agro-eco-hydrological model

Arid

DOI	10.1007/s11368-020-02647-7
	Evaluating the effects of layered soils on water flow, solute transport, and crop growth with a coupled agro-eco-hydrological model
	Chen, Shuai 1; Mao, Xiaomin 1; Shukla, Manoj K.2
通讯作者	Mao, Xiaomin
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
EISSN	1614-7480
出版年	2020
卷号	20 期号:9 页码:3442-3458
英文摘要	Purpose Soil salinization and degradation in the arid and semiarid areas are a worldwide phenomenon. Soil capping with capillary barriers is a potential practice to hydraulically isolate contaminated soils, which may improve the soil environment for plant growth. This study aims to investigate the influences of soil capping on crop growth and soil salinization control in the arid area with shallow groundwater tables. Materials and methods A one-dimensional agro-eco-hydrological model, LAWSTAC, capable of simulating water and solute transport in layered soil coupled with crop growth, was applied for simulating sunflower growth under field condition in Arid Northwest China. The model was calibrated and validated with the experimental data of 2012 and 2013 crop seasons. The calibrated model was then used to explore how the soil capping consisting of combinations of fine soil (10, 15, 17, 19, and 20 cm thick) and coarse sand (10, 5, 3, 1, and 0 cm thick correspondingly) would influence the soil water and salt dynamics, and seed yield. Results and discussion Simulation results by LAWSTAC compared well with the observed soil water content, salt concentration, leaf area index, and seed yield. Further scenario simulations showed that a sand layer in the soil capping could greatly affect the water and salt distribution in the soil above and below the sand layer. Though soil capping could decrease the water storage (WS) in the root zone, it caused no obvious increase in water stress to root uptake for sand thickness of 1-3 cm and also considerably reduced the root zone salt content (SC) in crop season compared with that without soil capping. The average WS during the crop season showed a negative correlation with the thickness of sand layer in the soil capping. The average SC from planting to harvest was significantly lower for thicker sand in the soil capping. To soils with high background salinization, the increase of sand thickness would be helpful for enhancing seed yield, until it reached a critical value. Conclusions Coarse soil layer in the soil capping could prevent salt moving into the root zone, while fine soil could supply water to plant once water in coarse soil was low. Thus, in a long run, the soil capping consisting of combinations of fine and coarse soils with certain thicknesses would be an alternative practice for saline soil reclamation and improving crop production in arid area with shallow groundwater tables and soil salinization.
英文关键词	Layered soil Water and salt dynamics Crop growth Agro-ego-hydrologic model
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000536453500001
WOS关键词	IRRIGATION WATER ; HYDRAULIC CONDUCTIVITY ; SALT TOLERANCE ; SALINITY ; WHEAT ; GROUNDWATER ; INFILTRATION ; CONSUMPTION ; PARAMETERS ; MOVEMENT
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
来源机构	中国农业大学 ; New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319197
作者单位	1.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China; 2.New Mexico State Univ, Dept Plant & Environm Sci, MSC 3Q,POB 30003, Las Cruces, NM 88003 USA
推荐引用方式 GB/T 7714	Chen, Shuai,Mao, Xiaomin,Shukla, Manoj K.. Evaluating the effects of layered soils on water flow, solute transport, and crop growth with a coupled agro-eco-hydrological model[J]. 中国农业大学, New Mexico State University,2020,20(9):3442-3458.
APA	Chen, Shuai,Mao, Xiaomin,&Shukla, Manoj K..(2020).Evaluating the effects of layered soils on water flow, solute transport, and crop growth with a coupled agro-eco-hydrological model.JOURNAL OF SOILS AND SEDIMENTS,20(9),3442-3458.
MLA	Chen, Shuai,et al."Evaluating the effects of layered soils on water flow, solute transport, and crop growth with a coupled agro-eco-hydrological model".JOURNAL OF SOILS AND SEDIMENTS 20.9(2020):3442-3458.