沙漠与绿洲气象2025，Vol.19Issue(6)：63-70,8.DOI:10.12057/j.issn.1002-0799.2406.26004
膜下滴灌棉花花铃盛期茎流变化及其对气象因子的响应
Changes in Sap Flow and Its Response to Meteorological Factors during the Flowering and Boll Setting Stage of Drip Irrigation Cotton
摘要
Abstract
The flowering and boll setting stage is a critical period for water demand in cotton cultivation,as water deficit significantly impacts yield.Understanding sap flow variation characteristics during this stage in cotton grown in northern Xinjiang is essential for revealing transpiration and water consumption patterns and optimizing field water management.In this study,cotton sap flow velocity during the flowering and boll setting stage under conventional cultivation mode in the oasis of northern Xinjiang was continuously monitored by using stem flow meters.Methods such as the Pearson correlation coefficient are employed to investigate transpiration rates and water consumption of cotton under drip irrigation and their relationships with meteorological factors.The results indicate that under various typical weather conditions,sap flow velocity ranked from highest to lowest as follows:sunny>cloudy>rainy.Additionally,sap velocity exhibited a significant diurnal rhythm,showing a positively correlation with wind speed,temperature,total radiation irradiance,and saturated vapor pressure deficit,and a negative correlation with relative humidity.Notably,there was a time lag between changes in sap flow velocity and meteorological factors.The peak sap flow velocity occurred slightly before or after peak temperature.Furthermore,the decline in sap flow velocity lagged behind total radiation decline by approximately 1.0-1.5 hours,while reaching its peak 1.0-2.0 hours earlier than the maximum value of saturated vapor pressure dificit.During the flowering and boll-setting stage,the daily transpiration rates of cotton ranged from 2.2 to 6.6 mm·d-1 across different years,exhibiting significant interannual variability.Considering the mechanisms by which meteorological factors influence sap flow,it is recommended to incorporate transpiration patterns and sap flow characteristics into irrigation strategies to improve water use efficiency.关键词
棉花/花铃盛期/茎流/气象因子Key words
cotton/flower and boll-setting stage/sap flow velocity/meteorological factors分类
农业科技引用本文复制引用
李顺澳,王雪姣,黄彬香,孙帅,黄健,张钰曈,马色力麦..膜下滴灌棉花花铃盛期茎流变化及其对气象因子的响应[J].沙漠与绿洲气象,2025,19(6):63-70,8.基金项目
国家自然科学基金项目(42105172) （42105172）
新疆维吾尔自治区"天山英才"-"三农"骨干人才项目(2023SNGGGCC023,SNGGGCC2022014) （2023SNGGGCC023,SNGGGCC2022014）
新疆维吾尔自治区重点研发计划课题(2022B02001-1) （2022B02001-1）
