干旱区生态环境知识资源中心(Arid): Assessing the impact of early and terminal droughts on root growth, grain yield and yield stability in old and modern wheat cultivars on the Loess Plateau

Arid

DOI	10.1016/j.agwat.2024.108940
	Assessing the impact of early and terminal droughts on root growth, grain yield and yield stability in old and modern wheat cultivars on the Loess Plateau
	Fang, Yan; Wang, Jun; Zhang, Ranran; Li, Fengxian; Liang, Liyan; Liu, Shuo; Xu, Bingcheng; Chen, Yinglong
通讯作者	Chen, YL
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2024
卷号	301
英文摘要	Understanding changes in root traits of high-yielding genotypes that consistently perform during different drought periods is crucial for improving wheat production and yield stability. A 2-year field trial and a pot experiment were conducted to determine the response of root growth and grain yield to early and terminal droughts in old and modern cultivars (FC3: 1960s and CH1: 2010s) under rainfed and irrigated conditions in the field. Rainfed wheat faced terminal drought in 2015 - 2016 and early drought in 2016 - 2017. Plants in the pot experiment were exposed to terminal drought, early drought, and well-watered. Both field and pot experiments showed higher grain yield in modern cultivar CH1 compared to FC3. Early and terminal droughts reduced grain yield in both cultivars, with a greater reduction in FC3. CH1 exhibited higher yield stability under drought conditions and experienced less reduction in early drought. Compared to FC3, CH1 produced more root biomass in the early growth stage. At anthesis, CH1 had significantly lower root biomass and root length density in the topsoil layer (0 - 0.2 m) and higher in the subsoil layer (0.2 - 1.0 m) than FC3, respectively. At maturity, the retention rate of subsoil root biomass in CH1 was higher, especially under early drought (80.2 % in field and 93.9 % in pot experiments). Both cultivars consumed similar seasonal water use, but CH1 reduced pre-anthesis water use and consumed more water after anthesis. This study indicates that modern cultivar had vigorous root growth at early stage. A higher proportion of root biomass preserved in deep soil after anthesis enhanced postanthesis water use and photosynthetic rate, improved post-anthesis dry matter accumulation, and thus resulted in higher thousand kernel weight. These factors ensure higher yield and yield stability under both early and terminal drought stress.
英文关键词	Drought stress Loess plateau Root biomass Root length density Semi-arid area Triticum aestivum L
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:001267631700001
WOS关键词	WATER-USE EFFICIENCY ; DRY-MATTER ; DURUM-WHEAT ; NITROGEN ACCUMULATION ; COMPETITIVE ABILITY ; SYSTEM ARCHITECTURE ; GENOTYPIC VARIATION ; WINTER-WHEAT ; EARLY VIGOR ; REMOBILIZATION
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/2XILL650/402683
推荐引用方式 GB/T 7714	Fang, Yan,Wang, Jun,Zhang, Ranran,et al. Assessing the impact of early and terminal droughts on root growth, grain yield and yield stability in old and modern wheat cultivars on the Loess Plateau[J],2024,301.
APA	Fang, Yan.,Wang, Jun.,Zhang, Ranran.,Li, Fengxian.,Liang, Liyan.,...&Chen, Yinglong.(2024).Assessing the impact of early and terminal droughts on root growth, grain yield and yield stability in old and modern wheat cultivars on the Loess Plateau.AGRICULTURAL WATER MANAGEMENT,301.
MLA	Fang, Yan,et al."Assessing the impact of early and terminal droughts on root growth, grain yield and yield stability in old and modern wheat cultivars on the Loess Plateau".AGRICULTURAL WATER MANAGEMENT 301(2024).