干旱区生态环境知识资源中心(Arid): Maximizing the water productivity and economic returns of alfalfa by deficit irrigation in China: A meta-analysis

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DOI	10.1016/j.agwat.2023.108454
	Maximizing the water productivity and economic returns of alfalfa by deficit irrigation in China: A meta-analysis
	Li, Maona; Zhang, Yunlong; Ma, Chizhen; Sun, Hongren; Ren, Wei; Wang, Xianguo
通讯作者	Wang, XG
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	287
英文摘要	Alfalfa (Medicago sativa L.) is a high-water-use crop primarily cultivated in water-scarce areas in China. Deficit irrigation is still considered a promising strategy to improve regional water productivity (WP) despite the risk of yield loss. The objectives of this paper were to better understand the effects of deficit irrigation on alfalfa yield and WP via a meta-analysis, to quantify the relationship between alfalfa yield and crop water use and to identify water management practices that strike a balance between costs and returns in China. A total of 28 published papers covering 26 locations showed that deficit irrigation reduced alfalfa yields by 17.4% & PLUSMN; 1.2% and increased WP levels by 14% & PLUSMN; 2.5% relative to full irrigation. The yield and WP changes were significantly (P < 0.05) caused by the irrigation application rate and timing, soil texture, soil field capacity and soil organic matter. The application of deficit irrigation only at the budding stage effectively reduced alfalfa yield losses, with the lowest yield loss (8%) relative to full irrigation during the whole growth stage. In soil with a high bulk density (1.5-1.6 g cm-3), high organic matter content (>30 g kg-1) and sandy loam soils, the magnitudes of the effects on yield reduction were smaller than those on WP improvement. Both alfalfa biomass yield and WP exhibited a parabolic relationship with the crop water use. Based on an economic and trade-off analysis, a deficit level of 90% of full irrigation is recommended in semi-humid regions for WP maximization. Deficit levels of 80% of full irrigation and 60% of full irrigation are more appropriate in semi-arid and arid regions, respectively to maximize the net income per unit water.
英文关键词	Forage Water management Crop water use Yield Trade-off analysis
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001046726400001
WOS关键词	SUBSURFACE DRIP IRRIGATION ; USE EFFICIENCY ; YIELD ; AGRICULTURE
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/2XILL650/395080
推荐引用方式 GB/T 7714	Li, Maona,Zhang, Yunlong,Ma, Chizhen,et al. Maximizing the water productivity and economic returns of alfalfa by deficit irrigation in China: A meta-analysis[J],2023,287.
APA	Li, Maona,Zhang, Yunlong,Ma, Chizhen,Sun, Hongren,Ren, Wei,&Wang, Xianguo.(2023).Maximizing the water productivity and economic returns of alfalfa by deficit irrigation in China: A meta-analysis.AGRICULTURAL WATER MANAGEMENT,287.
MLA	Li, Maona,et al."Maximizing the water productivity and economic returns of alfalfa by deficit irrigation in China: A meta-analysis".AGRICULTURAL WATER MANAGEMENT 287(2023).