干旱区生态环境知识资源中心(Arid): Evaluating soil salt dynamics in a field drip-irrigated with brackish water and leached with freshwater during different crop growth stages

Arid

DOI	10.1016/j.agwat.2020.106601
	Evaluating soil salt dynamics in a field drip-irrigated with brackish water and leached with freshwater during different crop growth stages
	Zhang, Yuehong; Li, Xianyue; Simunek, Jiri; Shi, Haibin; Chen, Ning; Hu, Qi; Tian, Tong
通讯作者	Li, XY (corresponding author), Inner Mongolia Agr Univ, Coll Water Conservancy & Civil Engn, Hohhot 010018, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	244
英文摘要	Irrigation with brackish water is a possible solution to alleviate freshwater shortages in arid and semi-arid regions. However, necessary measures need to be taken to leach accumulated salts out of the root zone. This can be accomplished by leaching with freshwater applied by surface irrigation (LFSI), which needs to be optimized to improve the leaching efficiency. An experiment in a field drip-irrigated with brackish water was carried out during 2017 and 2018 to evaluate the effects of leaching (or no leaching (T0)) during the corn elongation (T1), tasseling (T2), and grain-filling (T3) stages. The HYDRUS (2D/3D) model was calibrated and validated using experimental data collected in 2017 and 2018, respectively. The results of numerical simulations were in good agreement with measurements, which is electrical conductivity (ECw), with mean relative errors of 11.9%, 10.1%, 10.6%, and 9.2% for the T1, T2, T3, and T0 treatments, respectively, during the validation periods. LFSI during the corn elongation stage (T1) had the shortest duration of high salinity stress which lasted 42, 56, 57, and 82 days for the T1, T2, T3, and T0 scenarios, respectively. The highest rate of salt reduction in the root zone (i.e., the desalination rate) occurred when LFSI was applied during the corn grain-filling stage (T3). The desalinization rates were 59%, 68%, and 69% in the T1, T2, and T3 treatments, respectively. The cumulative salt flux at a depth of 40 cm increased by 2.0%, 16.3%, and 34.7% for T1, T2, and T3, respectively, compared to T0. Twodimensional simulations of ECe distributions revealed that the high salinity stress area in the soil profile after LFSI was 4%, 48%, and 92% higher for T0 than for T1, T2, and T3, respectively. The simulations showed that optimal leaching time was about 41 days after sowing, which led to the lowest duration of the high salinity stress period and a relatively high desalination rate of 59%.
英文关键词	Drip irrigation Leaching during different growth stages Duration of high salt stress HYDRUS (2D/3D) Corn
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000603305900005
WOS关键词	GOOD QUALITY WATERS ; SHALLOW GROUNDWATER ; NONSALINE WATERS ; CONJUNCTIVE USE ; SALINE WATER ; HYDRUS 2D/3D ; CYCLIC USES ; SALINIZATION ; STRATEGIES ; YIELD
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347659
作者单位	[Zhang, Yuehong; Li, Xianyue; Shi, Haibin; Chen, Ning; Hu, Qi; Tian, Tong] Inner Mongolia Agr Univ, Coll Water Conservancy & Civil Engn, Hohhot 010018, Peoples R China; [Simunek, Jiri] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA
推荐引用方式 GB/T 7714	Zhang, Yuehong,Li, Xianyue,Simunek, Jiri,et al. Evaluating soil salt dynamics in a field drip-irrigated with brackish water and leached with freshwater during different crop growth stages[J],2021,244.
APA	Zhang, Yuehong.,Li, Xianyue.,Simunek, Jiri.,Shi, Haibin.,Chen, Ning.,...&Tian, Tong.(2021).Evaluating soil salt dynamics in a field drip-irrigated with brackish water and leached with freshwater during different crop growth stages.AGRICULTURAL WATER MANAGEMENT,244.
MLA	Zhang, Yuehong,et al."Evaluating soil salt dynamics in a field drip-irrigated with brackish water and leached with freshwater during different crop growth stages".AGRICULTURAL WATER MANAGEMENT 244(2021).