农业资源与环境学报2024，Vol.41Issue(6)：1472-1481,10.DOI:10.13254/j.jare.2024.0720
不同地下水埋深冬灌淋洗排盐特征及数值模拟
Characteristics and numerical simulation of irrigation leaching and salt discharge in winter with different groundwater depth
摘要
Abstract
In order to explore the distribution characteristic of winter irrigation leaching salt and the law of salt discharge under different groundwater depths in saline soil,winter irrigation leaching experiments with different groundwater depths were carried out in Korla,southern Xinjiang,from 2022 to 2023.The groundwater depths were set at 2.0 m and 3.0 m,and the winter irrigation was the alternate year winter irrigation and continuous use of winter irrigation.The HYDRUS-2D water salt movement simulation model was established,and the salt discharge characteristics and appropriate leaching quota under different groundwater depths and winter irrigation leaching conditions in saline soil were analyzed.The results showed that the average desalination rate of 0～60cm soil layer under continuous use of winter irrigation with different groundwater depths was significantly higher than that of the alternate year winter irrigation(P<0.05),and the groundwater depth was negatively correlated with the leaching salt discharge of winter irrigation.The cumulative salt discharge of the treatment with groundwater depth of 2.0 m was 1.5～2.0 times higher than that of the treatment with groundwater depth of 3.0 m under different winter irrigation.The determination coefficient of drainage and salt discharge of the HYDRUS-2D water salt movement simulation model was 0.914～0.987,and the measured value of soil is in good agreement with the simulated value;the soil desalination rate per cubic meter of water gradually increased with the increase of irrigation amount under different groundwater levels,and the deeper the groundwater depth,the smaller the impact on the soil salt in the rhizosphere layer before the next spring sowing.It was more suitable for moderately salinized soil with groundwater depth less than 1.5 m and winter irrigation quota of 270 mm.The research results provided references for the formulation of groundwater table burial depth and winter irrigation leaching scheme under different salinization conditions in northwest arid area in China.关键词
脱盐率/排盐量/冬灌/地下水埋深/HYDRUS-2DKey words
desalination rate/salt discharge/winter irrigation/groundwater depth/HYDRUS-2D分类
农业科技引用本文复制引用
盛统民,张胜江,李志鹏,张江辉,麦尔丹·加帕尔..不同地下水埋深冬灌淋洗排盐特征及数值模拟[J].农业资源与环境学报,2024,41(6):1472-1481,10.基金项目
国家重点研发计划项目(2021YFD1900805) （2021YFD1900805）
新疆维吾尔自治区自然基金项目(2024D01A98) （2024D01A98）
"天山英才"领军人才项目(2022TSYCLJ0069)National Key Research and Development Program of China(2021YFD1900805) （2022TSYCLJ0069）
Xinjiang Uygur Autonomous Region Natural Fund Project(2024D01A98) （2024D01A98）
Leading Talent Project of"Tianshan Talents"(2022TSYCLJ0069) （2022TSYCLJ0069）
