紫花苜蓿对次生盐渍化土壤的改良效果研究  

Effects of salinized soil improvement using Medicago sativa

作　　者：郭晔红[1] 张晓琴[2] 胡明贵[2] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070 [2]甘肃省治沙研究所,甘肃武威733000

出　　处：《甘肃农业大学学报》2004年第2期173-176,共4页Journal of Gansu Agricultural University

基　　金：国家科技攻关西部专项(编号:2001BA901A33)

摘　　要：该试验地点设在甘肃临泽小泉子试验站。试验选用牧草紫花苜蓿 (Medicago sativa),进行盐渍化土壤的改良及苜蓿的耐盐性研究,实验地分别对荒滩、3年生(97苜蓿)和6年生苜蓿(94苜蓿)地进行取样比较,取样土层分0～30 cm,30～60 cm,分析土壤的可溶性盐分含量、SO42-、Cl-、Mg2+、K++Na+、HCO3-和Ca2+及有机质含量。结果表明苜蓿种植地的可溶性盐分含量及各种盐分离子含量与荒滩地相比均有所降低,有机质含量有明显升高趋势。6年生苜蓿(94苜蓿)较3年生苜蓿(97苜蓿)地的可溶性盐分含量及各种盐分离子含量也少有降低。The test site was located in Xiaoquanzi Experiment Station, Linze County, Gansu. Alfafa was chosed as the experimental material, to improve the salinized land. We chosed barren land , three year-old alfafa farmland (97 alfafa) and six year-old alfafa (94 alfafa) farmland to select the soil, taking soil samples from two layer of 0～30 cm and 30～60 cm to measure tatal soil soluable salt content, SO42-, CL-, Mg2+, K+, Na+, HCO3- and Ca2+ and the organism content. The results showed the total soluable salt content in alfafa land obviously decreased in comparison with baren land, and the organism content obviously went up.

关 键 词：紫花苜蓿 盐渍化 生物防盐 盐碱滩 

分 类 号：S156.4[农业科学—土壤学]