基于两种不同质地土壤浅沟排盐效果分析  

Shallow Ditches Salt Drainage Effect of Two Different Soil Textures

作　　者：虎胆·吐马尔白 胡钜鑫[2] 米力夏提·米那多拉 杨未静 Hudan·Tumarbay;HU Ju-xin;Minaduola Milixiati;YANG Wei-Jing(Key Laboratory of Water Science and Engineering,Ministry of Water Resources,Nanjing 210029,China;College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]南京水利科学研究院水文水资源与水利工程重点实验室,南京210029 [2]新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处：《节水灌溉》2021年第11期61-64,70,共5页Water Saving Irrigation

基　　金：南京水利科学研究院水文水资源与水利工程科学国家重点实验室项目“干旱绿洲连作滴灌棉田根系层盐分累积效应与控盐模式研究”(2018nkms02)。

摘　　要：通过田间及室内试验和数值模拟,对比研究土壤浅沟排盐对不同类型土壤的排盐效果。以土壤颗粒分析、水分运动参数及土壤盐分弥散系数为基础,通过建立的数值模型,探讨膜下滴灌棉田设置浅沟排盐时生育期内土壤水盐运动规律。通过模型对比两组土壤在设置排盐浅沟的情况下土壤水分及盐分的分布规律,分析土壤类型对膜下滴灌棉田土壤水分、盐分分布情况的影响。结果表明粉壤土对土壤的持水效果明显优于壤土;相对于壤土,排盐浅沟在粉壤土中的排盐效果更佳,且盐分主要集中于排盐浅沟坡面处。In this study,the salt drainage effects of shallow ditch on different types of soil were comparatively studied by field and laboratory experiments and numerical simulation.Based on soil particle analysis,water movement parameters and soil salt dispersion coefficient,a numerical model was established to study the soil water and salt movement during the growth period of cotton field under drip irrigation with salt drainage shallow ditches.The model was used to compare the distribution of soil water and salt of two different groups of soil under the condition of salt drainage shallow ditches,and to analyze the influence of soil type on the distribution of soil water and salt of cotton field under mulched drip irrigation.The results showed that the water holding effect of silty loam was better than that of loam.Compared with loam,salt drainage shallow ditches have better salt-removal effect in silt loam,and the salt is mainly concentrated on the slope of salt drainage shallow ditches.

关 键 词：土壤 浅沟排盐 HYDRUS-2D 效果分析 

分 类 号：S156.4[农业科学—土壤学] S562[农业科学—农业基础科学]