干旱地区农业研究2016，Vol.34Issue(6)：97-102,109,7.DOI:10.7606/j.issn.1000-7601.2016.06.15
紫花苜蓿中心支轴式喷灌灌水均匀性试验研究
Experimental research of uniformity in center pivot sprinkler irrigation of alfalfa
摘要
Abstract
In order to increase the uniformity in center pivot sprinkler irrigation of alfalfa and quantatively analyze the main influence factors,carried out the uniformity experiment of center pivot sprinkler irrigation of alfalfa in demonstration area of Angsu Town of Etuoke Banner of Erdos City.Using standard Wilcox-Swailes coefficient method calculated the uniformity coefficients of sprinkler irrigation under different wind condition,and quantitatively researched the influence of sprinkler irrigation to drift losses,the canopy interception losses,total losses of drift and canopy interception and soil water content.The results showed that:The wind speed will be significant influence to uniformity coefficient of sprinkler irrigation.When the average wind speed was 2.57 m· s-1 and 1.53 m· s-1,the uniformity coefficients of sprinkler irrigation were 0.88 and 0.92 respectively,it explained good unifonnity of sprinkler irrigation.When the average wind speed was 3.34 m· s-1,the uniformity coefficients of sprinkler irrigation was 0.72,the uniformity was poor.When the sprinkler irrigation quota was 40 mm in research area,the maximal soil infiltration depth was 80 cm.AfMter irrigation the soil water content in 0 to 40 cm depth was significantly increased,the water distribution in this soil layer by new added irrigation volume was accounted for 85 ％ to 95 ％.The wind speed will be significantly affectetd the drift losses of sprinkler irrigation.The drift loss rate will be significantly increased with wind speed increasing.The impac of wind speed to canopy interception losses was poor than the drift losses,On the contrary the canopy interception loss rate will be lower when the larger wind speed.Even if when the wind speed was rather lower(1.53 m· s-1),the total losses rate of drift and canopy interception of sprinker irrigation was 11.0％ to 15.0％ in Alfalfa branching stage,the losses was too much.关键词
喷灌/均匀系数/漂移损失/冠层截留/紫花苜蓿Key words
sprinkler irrigation/uniformity coefficients/drift losses/canopy interception/alfalfa分类
农业科技引用本文复制引用
郑和祥,李和平,白巴特尔,程满金..紫花苜蓿中心支轴式喷灌灌水均匀性试验研究[J].干旱地区农业研究,2016,34(6):97-102,109,7.基金项目
水利部科技推广计划项目(TG1202和TG1401) （TG1202和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) （20121036）
