干旱区生态环境知识资源中心(Arid): Deficit irrigation combined with a high planting density optimizes root and soil water-nitrogen distribution to enhance cotton productivity in arid regions

Arid

DOI	10.1016/j.fcr.2024.109524
	Deficit irrigation combined with a high planting density optimizes root and soil water-nitrogen distribution to enhance cotton productivity in arid regions
	Wu, Fengquan; Tang, Qiuxiang; Cui, Jianping; Tian, Liwen; Guo, Rensong; Wang, Liang; Zheng, Zipiao; Zhang, Na; Zhang, Yanjun; Lin, Tao
通讯作者	Tang, QX
来源期刊	FIELD CROPS RESEARCH
ISSN	0378-4290
EISSN	1872-6852
出版年	2024
卷号	317
英文摘要	Context: Increasing the cotton planting density can reduce irrigation while maintaining the seed cotton yield. However, the underlying physiological and ecological mechanisms remain unclear. We hypothesized that increasing the planting density and reducing irrigation would promote dynamic consistency in the distribution of the roots, soil water, and nitrogen, leading to improved cotton water productivity and ultimately achieving a stable seed cotton yield. Method: To test this hypothesis, a 3-year field experiment (2019-2021) was conducted in Xinjiang, China. The main plots were subjected to 3 irrigation levels based on crop evapotranspiration (ETc): 0.6 (deficit), 0.8 (typical), and 1.0 ETc (adequate). Subplots were planted at 3 densities: 13.5 (low), 18.0 (typical), and 22.5 plants m(-2) (high). Results: Under typical irrigation conditions, the seed cotton yield was significantly higher at a typical planting density than at a low or high planting density. However, with adequate irrigation, a low planting density resulted in a higher yield, while a high planting density combined with adequate irrigation reduced the yield by 14.7% compared with typical conditions (typical irrigation + typical planting density). Under deficit irrigation, the seed cotton yield at a high planting density was 9.2-23.5 % higher than that at a low or typical planting density, achieving yield stability with 20 % water saving. The dry matter accumulation and harvest index showed no significant differences between typical irrigation + typical planting density and deficit irrigation + high planting density. Deficit irrigation combined with a high planting density resulted in a higher overlap rate of the root distribution area, soil water consumption area, and nitrate nitrogen consumption area, leading to higher water productivity than that of other density and irrigation combinations. Conclusion: Deficit irrigation combined with a high planting density can reduce water input by 20 % without sacrificing cotton yield, likely because of increased water productivity through the enhanced dynamic consistency of root distribution and soil water-nitrogen consumption. These findings provide valuable ecological and physiological insights for achieving water savings without compromising yield in arid and water-scarce regions.
英文关键词	Root system Soil water Soil nitrate nitrogen Water productivity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001295122700001
WOS关键词	LIMITED-IRRIGATION ; CANOPY STRUCTURE ; USE EFFICIENCY ; DRIP SYSTEM ; GROWTH ; MAIZE ; YIELD ; IMPROVES ; FIELD ; ACCUMULATION
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403736
推荐引用方式 GB/T 7714	Wu, Fengquan,Tang, Qiuxiang,Cui, Jianping,et al. Deficit irrigation combined with a high planting density optimizes root and soil water-nitrogen distribution to enhance cotton productivity in arid regions[J],2024,317.
APA	Wu, Fengquan.,Tang, Qiuxiang.,Cui, Jianping.,Tian, Liwen.,Guo, Rensong.,...&Lin, Tao.(2024).Deficit irrigation combined with a high planting density optimizes root and soil water-nitrogen distribution to enhance cotton productivity in arid regions.FIELD CROPS RESEARCH,317.
MLA	Wu, Fengquan,et al."Deficit irrigation combined with a high planting density optimizes root and soil water-nitrogen distribution to enhance cotton productivity in arid regions".FIELD CROPS RESEARCH 317(2024).