小麦渗灌的节水和增产效果研究

Research on Water-saving and Increase Production Effect of Subirrigation for Wheat

为了探究小麦的节水和增产效果,1996年、1997年进行了两年的小麦渗灌试验,1996年设置了1.0m,1.2m两种管距和地面灌三种处理,1997年增设了旱地对比处理。试验中观测和测试结果表明:与地面灌相比,1.0m管距渗灌产量基本与地面灌相同或略有增加,1.2m管距减产;与旱地比较,两种管距的增产幅度都比较大。1.0m管距渗灌耗水量节水9%～21.9%,灌水量节水29%～35%,节水期主要在孕穗到灌浆期。

In order to research on water-saving and inc rease production effect of su birrigation for wheat,the subir-rigation tests f or wheat had proceed ed in 1996and 1997,In 1996,three tre atment t ests were arranged,they are subirrigation with pipe interval of1.0m and 1. 2m,and gravity irrigatio n.In 1997,treatment of no irrigatio n was added as treatment contrasted with i rrigation treatment.Arming at wheat growing sit uation,yield,irrigation water use and dynamic state in every treatment ,the o bservation and test were proceeded.Test results indicated that compare d with t he yield of gravity irrigatio n,the yield of subirrigation with pi pe in-terva l of 1.0m was basically identic al or had a small increment,and the yield of subirrigation with pipe interval of1.2m decreased.Compared with the yield o f not irrigated field,the yield of subirrigation had a big increment .Water co nsumption of subirrigation with p ipe imterval of 1.0m had decreased by9%～ 21.9%and irrigation water use had decreased by 29%～35%,compared wit h gravity irrigation.Water-saving mainly occurred from ear bearing t o milkin g period.