排灌机械工程学报2025，Vol.43Issue(9)：938-951,14.DOI:10.3969/j.issn.1674-8530.24.0070
膜下滴灌灌水下限对北疆棉田水盐热运移和作物生长的影响
Influence of lower limit of irrigation water under mulched drip irrigation on water-salt-heat transport and crop growth in cotton fields of northern Xinjiang Province
摘要
Abstract
For cotton drip irrigation in the typical area of northern Xinjiang,two irrigation limits were established at the budding stage:60％-65％and 70％-75％of the field water holding capacity.Three irrigation limits were set at the bolling stage:55％-60％,60％-65％,and 70％-75％of field water holding capacity.A total of six treatments with different irrigation limits were designed by completely random design.The effects of different treatments on water and salt distribution,yield and its compo-nents and water use efficiency at different fertility stages of cotton were analyzed by using local conven-tional drip irrigation as the control.The results show that the salinity of the 0-50 cm soil layer increa-ses the fastest after irrigation,and the higher irrigation lower limit has a better salt washing effect due to the reduction of the irrigation interval and the increase of the irrigation frequency during the cotton fertility period,which leads to better salt leaching effects.The desalination rate of the 0-80 cm soil layer ranges from 11.67％to 46.99％during the whole reproductive period,and the desalination rate first decreases and then increases as the increase of the irrigation limit.The desalination effect is opti-mal when the irrigation threshold is 70％-75％of the field water retention rate at both the bud and bolling stages.The average soil temperature in the 0-50 cm soil layer of all treatments increases by 0.06％-3.89％compared to that of CK,and there is a linear relationship between soil temperature and water content and salinity in the 0-50 cm soil layers.Increasing the lower limit of irrigation can help to enhance the diffusion of water and downward seepage of salts.The treatment that controls the lower limit of irrigation,compared with CK,increases yield and water use efficiency by 4.32％to 26.46％and 50.60％to 89.16％,respectively,which is beneficial for improving cotton water use efficiency and yield.A comprehensive analysis show that when the lower limit of irrigation is set to 70％-75％,field water holding rate at both bud and boll stage,the seed cotton yield is the highest at 6 946.65 kg/hm2,which is 26.46％higher than that of the CK treatment,and the water use efficiency is 62.65％higher than that of the CK,achieving better water conservation,salt suppression and yield enhancement effects.关键词
棉花/膜下滴灌/水盐运移/脱盐率/产量/北疆Key words
cotton/mulched drip irrigation/water-salt transport/desalination rate/yield/northern Xinjiang分类
农业科技引用本文复制引用
齐文婷,王政钧,王航,薛皓文,马晓鹏,王建东,肖娟..膜下滴灌灌水下限对北疆棉田水盐热运移和作物生长的影响[J].排灌机械工程学报,2025,43(9):938-951,14.基金项目
新疆维吾尔自治区重点研发计划项目(2023B02014-3,2023B02024-1) （2023B02014-3,2023B02024-1）
中国农业科学院科技创新工程项目(2021-2025) （2021-2025）
新疆维吾尔自治区"天池英才"引进计划项目 （）
