棉花学报2025，Vol.37Issue(1)：25-37,13.DOI:10.11963/cs20240064
氮肥追施次数对膜下滴灌棉田供氮能力和棉花产量的影响
Effects of nitrogen top dressing frequency on soil nitrogen supply capacity and yield in cotton field under drip irrigation with plastic-film mulching
摘要
Abstract
[Objective]This study aims to investigate the effects of nitrogen(N)fertilizer top dressing frequency under drip irrigation on soil N content and cotton yield in southern Xinjiang,and to provide references for the rational N application.[Methods]Field experiments were conducted in Xayar County,Aksu Prefecture,Xinjiang,from 2021 to 2022.With the same total amount of pure N applied(300 kg·hm-2,20％basal application,and 80％top dressing with water),four treatments of N fertilizer top dressing frequency were set up(4,6,8,and 10;recorded as N4,N6,N8,and N10,respectively).The effects of different treatments on soil total N content and alkali-hydrolyzable N content in the cotton field,cotton dry matter mass and N content,cotton yield,and N partial productivity were analyzed.[Results]The effects of different treatments on soil N content in cotton field changed with cotton growth process.The soil total N and alkali-hydrolyzable N supply under N10 were relatively sufficient at the seedling stage,peak boll-setting stage,and boll opening stage,but was unfavorable to N supply at the squaring stage and peak flowering stage.Whereas soil total N and alkali-hydrolyzable N content were maintained at a higher level during the whole growth stage of cotton under N8.Also under N8,the maximum accumulation rate of dry matter and nitrogen in cotton plants,vegetative organs,and reproductive organs were the highest in 2022;the maximum accumulation rate of N in reproductive organs was the highest in 2021;the dry matter mass and N content of cotton plants,vegetative organs,and reproductive organs were relatively higher in 2021 and 2022.With the increase of N fertilizer top dressing frequency,seed cotton yield and N partial productivity increased firstly and then decreased,and all the highest ones were under N8.Compared with other treatments,seed cotton yield under N8 increased by 3.3％-39.2％and 13.3％-72.8％in 2021 and 2022,respectively;N partial productivity showed the same change range.[Conclusion]Under the water and fertilizer integration mode in the cotton field in southern Xinjiang,top dressing N fertilizer applied with irrigation for 8 times is beneficial to ensure the N supply of the cotton field,and to promote the accumulation of the dry matter and nitrogen in cotton,thus improving cotton yield and N partial productivity.关键词
棉花/氮肥/追施次数/干物质积累/氮素积累/产量/氮肥偏生产力Key words
cotton/nitrogen fertilizer/top dressing frequency/dry matter accumulation/nitrogen accumulation/yield/nitrogen partial productivity引用本文复制引用
吴晓芊,马悦,陈波浪,殷昊,张宸,罗宇,周乐儒,吴玉雯,张俊,王娟红,车庆轩..氮肥追施次数对膜下滴灌棉田供氮能力和棉花产量的影响[J].棉花学报,2025,37(1):25-37,13.基金项目
国家重点研发计划(2022YFD190010202) （2022YFD190010202）
新疆维吾尔自治区"天山英才"青年科技拔尖人才项目(2022TSYCCX0085) （2022TSYCCX0085）
新疆维吾尔自治区重点研发专项(2022B02033-1) （2022B02033-1）
新疆维吾尔自治区杰出青年项目"供磷强度和根系空间协同调控根际过程提高棉花磷效率的机制" （）
国家自然科学基金(32360793,31960629) （32360793,31960629）
新疆维吾尔自治区重大科技专项(2022A02007) （2022A02007）
