地埋滴灌点源入渗土壤水分运动规律实验研究  

A Study on Soil Water Movement Law of Point Source Infiltration under Buried Drip Irrigation

作　　者：张松[1] 李和平[2] 郑和祥[2] 曹雪松[2] 王军[2] ZHANG Song LI He-ping ZHENG He-xiang CAO Xue-song WANG Jun(Inner Mongolia Agricultural University, Huhhot 010010, China Institute of Water Resources Science of Pasturing Area, Ministry of Water Resourees,Huhhot 010020, China)

机构地区：[1]内蒙古农业大学,呼和浩特010010 [2]水利部牧区水利科学研究所,呼和浩特010020

出　　处：《节水灌溉》2017年第1期25-27,32,共4页Water Saving Irrigation

基　　金：水利部科技推广计划项目(TG1401);内蒙古自治区新增"四个千万亩"节水灌溉工程科技支撑项目(20121036);中国水科院科研立项(MK2016J18)

摘　　要：通过室内砂土中进行地埋滴灌的实验,对地埋滴灌在砂土中的适应性进行初步研究,为田间试验布置提供依据。通过分析湿润锋的推移速率、特征点的土壤含水率变化规律,发现湿润锋推移速率先是径向大于垂向,随着灌水时间和灌水量增加,水平方向和垂向的湿润锋和含水率趋于平衡。根据对比滴灌带埋深15和20 cm特征点的含水率变化情况,得出埋深15 cm节水效果更好,更利于作物生长。实验还得出湿润比能作为滴灌灌水参数的指标,由于作物种植的间距和作物根系深度之比基本小于1.0,因此在田间实际灌溉中湿润比应控制在1.0左右。In this study,the adaptability of drip irrigation in sandy soil is preliminarily studied through a buried drip irrigation experiment in indoor sand to provide basis for the field experiment layout. Through the analysis of the transition velocity of wet front and the soil water content variation law of characteristic points,it is found that the transition velocity in radial direction is greater than that in vertical direction;with the increase of irrigation time and irrigation amount,the wetting front and moisture content in the horizontal and vertical direction get balance. The contrast of the moisture content of the characteristic points of 15 cm and 20 cm drip irrigation belt buried depth indicates that the water-saving effect of 15 cm drip irrigation belt buried depth is better and more beneficial for the crop growth. The experiment results also show that wet ratio can be used as an irrigation indicator parameter,and its value should be controlled around 1. 0 since the ratio of crop spacing to crop root depth is usually less than 1. 0.

关 键 词：地埋滴灌 点源入渗 湿润锋 湿润比 滴灌带埋深 

分 类 号：S275.6[农业科学—农业水土工程]