干旱区生态环境知识资源中心(Arid): Moving salts in an impermeable saline-sodic soil with drip irrigation to permit wolfberry production

Arid

DOI	10.1016/j.agwat.2018.11.011
	Moving salts in an impermeable saline-sodic soil with drip irrigation to permit wolfberry production
	Zhang, Tibin 1,2,3; Dong, Qin’ge 1,2,3; Zhan, Xiaoyun 1,2; He, Jianqiang 3,4; Feng, Hao 1,2,3
通讯作者	Feng, Hao
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	213 页码:636-645
英文摘要	A saline-sodic wasteland of takyric solonetz is widely distributed across arid regions of Northwest China. The poor soil structure and low permeability (K-s < 0.1 mm d(-1)) hinder reclamation because the excessive sodium salt occurring mainly in the surface soil layer cannot be leached down by conventional leaching methods, including drip irrigation, without any assistance measure. The objectives of this study were: 1) to characterize salt movement that occurs within the planted ridge due to drip irrigation of varying amounts, and 2) to identify the optimum soil matric potential (SMP) threshold for drip irrigation in order for wolfberry (Lycium barbarum L.) to be successfully produced, based on plant survival and productivity. A three-year field experiment was conducted with wolfberry using drip irrigation on this solonetz soil. The soil was improved by creating shallow sand-filled niches beneath drip emitters. Five SMP levels triggered irrigations of 5 mm: - 5 kPa (S1), -10 kPa (S2), -15 kPa (S3), - 20 kPa (S4), and - 25 kPa (S5). The improved drip irrigation system significantly facilitated soil water infiltration, and redistributed soil salt in the planted ridge. The leached salt accumulated increasingly at the surface layers of the ridge slope and furrow. Irrigating at higher threshold SMP resulted in lower soil salinity in the root zone. Crop evapotranspiration (ET) was affected by different drip regimes, and lower SMP resulted in reduction in irrigation application amount and ET. Deep percolation was always < 8 mm during the three-year study. Soil salinity in the root zone at the end of the study under the Sl-S4 treatments decreased to < 8.9 dS m(-1), the salt-tolerant threshold of wolfberry. At the end of the study, wolfberry survival rate and productivity were greatest for the S2-S4 treatments. These results and the greater water use efficiency found with the S3 and S4 treatments suggest using an SMP threshold of - 20 kPa to trigger drip irrigation for wolfberry production on this impermeable saline-sodic soil.
英文关键词	Drip irrigation Salt characteristic Salt regulation Solonetz Water consumption
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000457952700059
WOS关键词	WATER-USE ; COTTON GROWTH ; ARID REGION ; L. ; RECLAMATION ; MANAGEMENT ; YIELD
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213985
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 3.Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Yangling 712100, Shaanxi, Peoples R China; 4.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tibin,Dong, Qin’ge,Zhan, Xiaoyun,et al. Moving salts in an impermeable saline-sodic soil with drip irrigation to permit wolfberry production[J]. 西北农林科技大学,2019,213:636-645.
APA	Zhang, Tibin,Dong, Qin’ge,Zhan, Xiaoyun,He, Jianqiang,&Feng, Hao.(2019).Moving salts in an impermeable saline-sodic soil with drip irrigation to permit wolfberry production.AGRICULTURAL WATER MANAGEMENT,213,636-645.
MLA	Zhang, Tibin,et al."Moving salts in an impermeable saline-sodic soil with drip irrigation to permit wolfberry production".AGRICULTURAL WATER MANAGEMENT 213(2019):636-645.