干旱区生态环境知识资源中心(Arid): Optimal drip irrigation leaching amount and times enhance seed cotton yield and its stability by improving soil chemical environment and source-sink relationship

Arid

DOI	10.1016/j.fcr.2024.109531
	Optimal drip irrigation leaching amount and times enhance seed cotton yield and its stability by improving soil chemical environment and source-sink relationship
	Xiao, Chao; Zhang, Fucang; Li, Yi; Fan, Junliang; Xu, Xintong; Liu, Xiaoqiang
通讯作者	Zhang, FC ; Li, Y ; Fan, JL
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: The arid and semi-arid regions of northwest China play a pivotal role in the national cotton production. However, soil salinization poses a severe constraint on seed cotton yield in this region. Salt leaching by drip irrigation has become increasingly popular for ameliorating saline-alkali soils. Yet, the most effective approach for utilizing drip irrigation leaching to maximize cotton productivity remains uncertain. Methods: Over a three-year period, field experiments were performed to explore the effects of four leaching amounts (75, 150, 225, and 300 mm) and four leaching times (seedling stage, budding stage, flowering stage, and boll-setting stage as one, two, three and four times) on soil-water dynamics, ion composition, source-sink relationships, seed cotton yield and its stability in saline-alkali cotton fields under drip irrigation. Results: The study revealed that soil moisture significantly fluctuated during the cotton growing seasons. Timely irrigation significantly boosted soil moisture content by 11.3 %-23.5 %. Soil salinity was lower at the early growth stages of cotton, but it gradually increased over time, peaking at the flowering and boll-setting stages. Appropriate leaching effectively mitigated soil salinity, particularly at the flowering stage, resulting in a reduction of salt accumulation by 13.9 %-32.7 %. As leaching amount increased, the relative content of Ca2+ increased, while K+ and Na+ contents gradually decreased, thereby reducing the relative content of harmful ions and leading to a decrease in SAR by 7.07 %-34.3 %. In terms of biomass, the W3 treatment exhibited the highest level, whih was 1.68 %-25.4 % greater than that of the other treatments. Among the three years, the S3 and S4 treatments consistently produced the highest biomass, with increases of 12.66 %-35.25 % and a slight 0.85 % difference, respectively. Significance: The optimal leaching strategy, combining the W3 irrigation amount with the S3 leaching times achieved the highest seed cotton yield with the lowest yield variability. This underscored the critical importance of suitable irrigation and management practices for enhancing seed cotton yield and mitigating the adverse effects of soil salinity on cotton production. Soil salinity indicators, such as sodium adsorption ratio and exchangeable sodium percentage, played a pivotal role in biomass accumulation and yield stability. A total leaching amount of 300 mm applied at the seedling, budding, flowering, and boll-setting stages was recommended to maximize cotton productivity.
英文关键词	Source-sink relationships SAR SYI Ion composition Cotton yield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001293082800001
WOS关键词	GROWTH-PROMOTING RHIZOBACTERIA ; SALT STRESS ; LARGE-SCALE ; PLANT ; SALINITY ; FIELD ; RECLAMATION ; TOLERANCE ; DENSITY ; BENEATH
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/2XILL650/403737
推荐引用方式 GB/T 7714	Xiao, Chao,Zhang, Fucang,Li, Yi,et al. Optimal drip irrigation leaching amount and times enhance seed cotton yield and its stability by improving soil chemical environment and source-sink relationship[J],2024,317.
APA	Xiao, Chao,Zhang, Fucang,Li, Yi,Fan, Junliang,Xu, Xintong,&Liu, Xiaoqiang.(2024).Optimal drip irrigation leaching amount and times enhance seed cotton yield and its stability by improving soil chemical environment and source-sink relationship.FIELD CROPS RESEARCH,317.
MLA	Xiao, Chao,et al."Optimal drip irrigation leaching amount and times enhance seed cotton yield and its stability by improving soil chemical environment and source-sink relationship".FIELD CROPS RESEARCH 317(2024).