Effect of irrigation methods on root growth, root-shoot ratio and yield components of cotton by regulating the growth redundancy of root and shoot

doi:10.1016/j.agwat.2020.106120

	Effect of irrigation methods on root growth, root-shoot ratio and yield components of cotton by regulating the growth redundancy of root and shoot
	Wang, Jiangtao ; Du, Gangfeng ; Tian, Jingshan ; Zhang, Yali ; Jiang, Chuangdao 1; Zhang, Wangfeng 2
	2020
发表期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
卷号	234
摘要	Mulched drip irrigation is a common water-saving irrigation technology that can improve water resource utilization efficiency in arid areas. The change of irrigation method affects the growth of crop root system and then regulates the growth of aboveground organs. However, there have been limited comparative studies on how mulched drip irrigation affects the cotton root growth and regulates the relationship between cotton root and shoot. The objective of this study was to determine whether mulched drip irrigation could achieve water-saving and high-yield cotton cultivation by regulating the growth redundancy of root and shoot. Under field conditions, mulched drip irrigation (conventional drip irrigation and excessive drip irrigation) and traditional flood irrigation (conventional flood irrigation and reduced flood irrigation) were used in this experiment. Traditional flood irrigation was used as the control group. The results showed that compared with the traditional flood irrigation, the higher soil water content under mulched drip irrigation increased the specific root length (SRL), which promoted the growth of fine root length and biomass at the full flowering stage and prophase full boll stage. The growth of fine roots increased the root-shoot ratio (R/S) of mulched drip irrigation, and then inhibited the excessive vegetative growth of the aboveground parts. When entering the late full boll stage and boll opening stage, the fine root biomass and fine root mass fraction decreased rapidly under the mulched drip irrigation, resulting in a lower R/S. The smaller R/S of mulched drip irrigation facilitated the distribution of photosynthetic products to reproductive organs, which increased the boll number per plant by 7.30 %-25.10 %, thus increasing the boll loading of fine root system and seed cotton yield. However, compared with conventional drip irrigation, over irrigation led to excessive vegetative growth of cotton under excessive drip irrigation, which resulted in the decrease of boll opening rate and seed cotton yield by 8.71 %-17.19 % and 14.14 %-24.27 %, respectively. Moreover, the smaller R/S at the late growth stage enabled conventional drip irrigation to achieve the maximum water use efficiency (WUE). Therefore, mulched drip irrigation promoted the root growth of cotton and inhibited the vigorous vegetative growth of shoot before the prophase full boll stage, and then reduced the growth redundancy of root and increased the productive capacity of the fine root system after the prophase full boll stage, which increased boll number per plant and yield. However, only under the appropriate irrigation amount (390 mm), mulched drip irrigation can increase both yield and WUE, thus achieving the goal of water-saving and high-yield cultivation.
关键词	Mulched drip irrigation Cotton Root growth Root-shoot ratio Growth redundancy
学科领域	Agronomy ; Water Resources
DOI	10.1016/j.agwat.2020.106120
收录类别	SCI
语种	英语
WOS关键词	WATER-USE EFFICIENCY ; DRIP IRRIGATION ; SOIL-MOISTURE ; GRAIN-YIELD ; MAIZE ; LENGTH ; CROPS ; FIELD ; RESPONSES ; BIOMASS
WOS研究方向	Agriculture ; Water Resources
WOS记录号	WOS:000525293700018
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1873-2283
资助机构	National Key Research and Development Program of China [2018YFD1000907]
作者邮箱	zhwf_agr@shzu.edu.cn
引用统计	被引频次：45[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21820
专题	中科院北方资源植物重点实验室
作者单位	1.Shihezi Univ, Coll Agr, Key Lab Oasis Ecoagr, Xinjiang Prod & Construct Corps, Shihezi 832003, Xinjiang, Peoples R China 2.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China 3.Shihezi Univ, Coll Agr, Shihezi 832003, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jiangtao,Du, Gangfeng,Tian, Jingshan,et al. Effect of irrigation methods on root growth, root-shoot ratio and yield components of cotton by regulating the growth redundancy of root and shoot[J]. AGRICULTURAL WATER MANAGEMENT,2020,234.
APA	Wang, Jiangtao,Du, Gangfeng,Tian, Jingshan,Zhang, Yali,Jiang, Chuangdao,&Zhang, Wangfeng.(2020).Effect of irrigation methods on root growth, root-shoot ratio and yield components of cotton by regulating the growth redundancy of root and shoot.AGRICULTURAL WATER MANAGEMENT,234.
MLA	Wang, Jiangtao,et al."Effect of irrigation methods on root growth, root-shoot ratio and yield components of cotton by regulating the growth redundancy of root and shoot".AGRICULTURAL WATER MANAGEMENT 234(2020).

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