气候变化领域集成服务门户(CCPortal): Maintaining grain number by reducing grain abortion is the key to improve water use efficiency of maize under deficit irrigation and salt stress

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DOI	10.1016/j.agwat.2024.108727
	Maintaining grain number by reducing grain abortion is the key to improve water use efficiency of maize under deficit irrigation and salt stress
	Gao, Jia; Liu, Ninggang; Wang, Xianqi; Niu, Zuoyuan; Liao, Qi; Ding, Risheng; Du, Taisheng; Kang, Shaozhong; Tong, Ling
发表日期	2024
ISSN	0378-3774
EISSN	1873-2283
起始页码	294
卷号	294
英文摘要	Drought and soil salinization are threatening maize production in Northwest China, and climate change is exacerbating water shortages. The objective of this study is to explore the mechanisms underlying spring maize yield and water use efficiency under water deficit and salt stress, to coordinate water conservation and maize production. A three-year field trial was conducted with two water levels (full irrigation and deficit irrigation) and two salt levels (0.65%o and 2%o) using two maize genotypes (ZD958 and XY335). Leaf area, leaf photosynthesis, dry matter accumulation, floret number, grain abortion, ear characteristics and water use efficiency were evaluated. Water, salt and their combined stress significantly decreased the grain yield by 7.3%, 20.5%, and 38.7%, respectively, 93.6% of which was explained by grain number depending on spikelet differentiation. Grain abortion was identified as the primary reason for maize yield reduction under water and salt stress. The reduction in total biomass, rather than biomass allocation suppressed spikelet differentiation under water and salt stress. Water or salt single stress improved water use efficiency (3.7%-17.5%) by reducing evaporation compared with no stress. Furthermore, water and salt combined stress significantly decreased maize productivity leading to reduction in water use efficiency. Taken together, reducing grain abortion to maintain grain number is the key to alleviate maize yield loss and improve water use efficiency under water and salt stress.
英文关键词	Water deficit; Salt stress; Grain number; Grain yield; Water use efficiency
语种	英语
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
WOS记录号	WOS:001185675100001
来源期刊	AGRICULTURAL WATER MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298280
作者单位	China Agricultural University
推荐引用方式 GB/T 7714	Gao, Jia,Liu, Ninggang,Wang, Xianqi,et al. Maintaining grain number by reducing grain abortion is the key to improve water use efficiency of maize under deficit irrigation and salt stress[J],2024,294.
APA	Gao, Jia.,Liu, Ninggang.,Wang, Xianqi.,Niu, Zuoyuan.,Liao, Qi.,...&Tong, Ling.(2024).Maintaining grain number by reducing grain abortion is the key to improve water use efficiency of maize under deficit irrigation and salt stress.AGRICULTURAL WATER MANAGEMENT,294.
MLA	Gao, Jia,et al."Maintaining grain number by reducing grain abortion is the key to improve water use efficiency of maize under deficit irrigation and salt stress".AGRICULTURAL WATER MANAGEMENT 294(2024).