宁夏灌溉回归水对土壤的影响及改良措施  

Impact of Irrigational Recovery Water on Soil and Measures for Melioration in Ningxia

作　　者：马云瑞[1] 苗济文[1] 张益民[1] 王杰[1] 

机构地区：[1]宁夏农林科学院土壤肥料研究所

出　　处：《宁夏农林科技》1998年第2期18-22,共5页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：国家自然科学基金

摘　　要：在排水较差条件下灌溉矿化度为１．３～１．６８ｇ／Ｌ的微咸水，土壤含盐量、ＳＡＲ、ＳＤＲ、ＳＳＰ、ＫＭｇ随灌溉年限延长而增高。表明土壤盐碱化加重，使旱作物减产，不能用纯回归水灌溉中轻度盐碱化土壤。采用混灌、咸淡输灌不会对土壤和作物产生危害。小麦生长全程覆盖地膜有明显的防返盐作用，但产量降低。覆盖秸秆降低早春地温，出苗迟，无防返盐效果。施有机肥、糠醛渣有良好的改良效果，有利于开发利用回归水。It was found that under the condition of relatively poor drainage if it was irrigated with light salt water with a mineralizatiom degree of 1.3～1.6g/L the saline concentration,SAR,SDR,SSP,KMg of the soil increased with the lengthening of years of irrigation. It indicates that the salinization of the soil was aggravating resulting in decline of yield of dryland crops.So it is not feasible to irrigate soil of middle and light salinization with pure recovery water.It would not produce harm to soil and crops if mixed irrigation and totation irrigation of salt water and fresh water were adopted.If the soil was mulched for the whole growth period of wheat salinization would be controlled but the yield of wheat would decline.Covering the soil with straw would reduce land temperature on early spring and delay emergence of seedlings and had no effect on control of salinization.Applicatiion of organic manure and furfural residue had fairly good effect on melioration of soil and was benificial to exploitation of recovery water.

关 键 词：灌溉回归水 土壤盐碱化 改良措施 农业技术措施 

分 类 号：S156.49[农业科学—土壤学]