Wheat cultivars with small root length density in the topsoil increased post-anthesis water use and grain yield in the semi-arid region on the Loess Plateau

doi:10.1016/j.eja.2021.126243

	Wheat cultivars with small root length density in the topsoil increased post-anthesis water use and grain yield in the semi-arid region on the Loess Plateau
	Fang, Yan 1,2; Liang, Liyan 1,2; Liu, Shuo 1,2; Xu, Bingcheng 1,2; Siddique, Kadambot Hm 3,4; Palta, Jairo A.3,4,5; Chen, Yinglong 1,2,3,4
刊名	EUROPEAN JOURNAL OF AGRONOMY
	2021-03-01
卷号	124 页码:13
关键词	Triticum aestivum Root system size Topsoil layer Post-anthesis dry matter accumulation N uptake
ISSN号	1161-0301
DOI	10.1016/j.eja.2021.126243
通讯作者	Chen, Yinglong(yinglong.chen@uwa.edu.au)
英文摘要	Large distribution of roots in topsoil layers allow more uptake of soil water and nutrients during the vegetative growth, but it may be disadvantageous if soil water deficit develops during the reproductive stage. The relationship between the distribution of roots in topsoil (0-0.4 m) and soil water use, dry matter and nitrogen (N) accumulations, and grain yield was examined in winter wheat (Triticum aestivum L.) with contrasting root size in the topsoil. Two old landraces (CW134 and JM47, larger root length and biomass in the topsoil) and two modern wheat cultivars (CH58 and LH7, smaller root system size in the topsoil), were grown in the field during two seasons (2016-2017 and 2017-2018) under rainfed and irrigation conditions in the semi-arid farmland on the Loess Plateau. Root biomass and root length density (RLD) in topsoil (0-0.4 m) was significantly higher in the old landraces than in the modern cultivars (P < 0.05) under rainfed and irrigation in both seasons (no such difference in subsoil, 0.4-1.0 m). The modern cultivars had significantly higher grain yield, grain N concentration, wateruse efficiency (WUE), and 1000-grain weight (P < 0.05). Seasonal water use was similar among all cultivars, but post-anthesis water use was higher in the modern cultivars, particularly under rainfed conditions in both seasons. Root biomass and RLD in the topsoil was positively correlated with pre-anthesis water use, but negatively correlated with after anthesis water use. Post-anthesis water use was closely related to post-anthesis dry matter, N accumulation, yield and WUE under rainfed conditions. To conclude, large distribution of mots in the topsoil had non-advantage for wheat grown under rainfed conditions. The small distribution of roots in the topsoil (characteristics of modern wheat cultivars) enhanced post-anthesis water use, increased post-anthesis dry matter and N accumulation, and hence attained higher grain yield and grain N when grown in the semi-arid environment.
资助项目	National Natural Science Foundation of China[41807516] ; National Natural Science Foundation of China[41722107] ; China Postdoctoral Science Foundation[2018M631199] ; Chinese Academy of Sciences (Hundred Talent Program)[A315021449] ; Shaanxi Postdoctoral Research Funding Project[2018BSHEDZZ142] ; Natural Science Basic Research Program of Shanxi[2019JQ-306]
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000620809100005
资助机构	National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Chinese Academy of Sciences (Hundred Talent Program) ; Shaanxi Postdoctoral Research Funding Project ; Natural Science Basic Research Program of Shanxi
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160539]
专题	中国科学院地理科学与资源研究所
通讯作者	Chen, Yinglong
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Univ Western Australia, UWA Inst Agr, Perth, WA 6001, Australia 4.Univ Western Australia, Sch Agr & Environm, Perth, WA 6001, Australia 5.CSIRO Agr & Food, Private Bag 5, Wembley, WA 6913, Australia
推荐引用方式 GB/T 7714	Fang, Yan,Liang, Liyan,Liu, Shuo,et al. Wheat cultivars with small root length density in the topsoil increased post-anthesis water use and grain yield in the semi-arid region on the Loess Plateau[J]. EUROPEAN JOURNAL OF AGRONOMY,2021,124:13.
APA	Fang, Yan.,Liang, Liyan.,Liu, Shuo.,Xu, Bingcheng.,Siddique, Kadambot Hm.,...&Chen, Yinglong.(2021).Wheat cultivars with small root length density in the topsoil increased post-anthesis water use and grain yield in the semi-arid region on the Loess Plateau.EUROPEAN JOURNAL OF AGRONOMY,124,13.
MLA	Fang, Yan,et al."Wheat cultivars with small root length density in the topsoil increased post-anthesis water use and grain yield in the semi-arid region on the Loess Plateau".EUROPEAN JOURNAL OF AGRONOMY 124(2021):13.