干旱区生态环境知识资源中心(Arid): Optimization-Based Water-Salt Dynamic Threshold Analysis of Cotton Root Zone in Arid Areas

Arid

DOI	10.3390/w12092449
	Optimization-Based Water-Salt Dynamic Threshold Analysis of Cotton Root Zone in Arid Areas
	Wu, Hui; Kang, Shaozhong; Li, Xiaojuan; Guo, Ping; Hu, Shunjun
通讯作者	Li, XJ
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:9
英文摘要	Threshold levels of soil moisture and salinity in the plant root zone can guide crop planting and farming practices by providing a baseline for adjusting irrigation and modifying soil salinity. This study describes a method of soil water and salinity control based on an optimized model for growing cotton in an arid area. Experiments were conducted in Akesu Irrigation District, southern Xinjiang, northwest China, to provide data for cotton yield and soil water content and salinity in the root zone at different growth stages. The sensitivity of cotton to soil water content and salinity was predicted for different growth periods using a modified Jensen model. An optimization model with 480 boundary conditions was created, with the objective of maximizing yield, to obtain the dynamically varying water and salt threshold levels in the root zone for scenarios that included three initial soil moisture content values (W0), eight irrigation quantities (M), five initial soil salt content values (S0), and four irrigation water salinity levels (K). Results showed that the flowering-boll stage is the crucial period for cotton yield, and the threshold levels of soil water content and salinity in the cotton root zone varied with the boundary conditions. The scenario chosen for the research area in this study was W0 = 0.85 theta(fc)(theta(fc)is field capacity),S0 = 4 g kg(-1),M= 400 mm,K= 0 g L-1. The predicted threshold levels of soil water for different growth stages (seedling, bud, flowering-boll, and boll-opening) were respectively 0.75-0.85 theta(fc), 0.65-0.75 theta(fc), 0.56-0.65 theta(fc), and 0.45-0.56 theta(fc). Corresponding threshold levels of salt were 4-4.16, 4.16-4.39, 4.39-4.64, and 4.64-4.97 g kg(-1)when no action was taken to remove salt from the root zone. This study provides an innovation method for the determination of dynamically varying soil water content and salt thresholds.
英文关键词	soil moisture salt dynamics threshold optimization model cotton
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000580059100001
WOS关键词	MULCHED DRIP IRRIGATION ; SOIL-SALINITY ; DEFICIT IRRIGATION ; AQUACROP MODEL ; USE EFFICIENCY ; GROWTH-STAGES ; YIELD ; WHEAT ; PERFORMANCE ; DROUGHT
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
来源机构	中国科学院新疆生态与地理研究所 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326930
作者单位	[Wu, Hui; Kang, Shaozhong; Li, Xiaojuan; Guo, Ping] China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China; [Hu, Shunjun] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Hu, Shunjun] Observat & Res Oasis Agroecosyst, Akesu Natl Stn, Akesu 843017, Peoples R China
推荐引用方式 GB/T 7714	Wu, Hui,Kang, Shaozhong,Li, Xiaojuan,et al. Optimization-Based Water-Salt Dynamic Threshold Analysis of Cotton Root Zone in Arid Areas[J]. 中国科学院新疆生态与地理研究所, 中国农业大学,2020,12(9).
APA	Wu, Hui,Kang, Shaozhong,Li, Xiaojuan,Guo, Ping,&Hu, Shunjun.(2020).Optimization-Based Water-Salt Dynamic Threshold Analysis of Cotton Root Zone in Arid Areas.WATER,12(9).
MLA	Wu, Hui,et al."Optimization-Based Water-Salt Dynamic Threshold Analysis of Cotton Root Zone in Arid Areas".WATER 12.9(2020).