Abstract: Through three years experiment about improvement of discarded salkaline land by biomeasures in Chaidamu Basin from 1998 to 2000, the results showed the effect was very notalbe. Total salt content decreased with plant growth. In 0～30cm soil layer the total salt content decreased from 1.518% to 0.126%, mean desalinization rate was 91.7%. The salt did not gather in top layer of soil notably. The seasonal change of total salt content was keep in "U" carve. Primary productivity increased highly by rehabilitation. The number of species, diversity and evenness in experimental field were higher than those in CK field.

Key words: Chaidamu Basin, Biomeasures, Discarded salkaline land, Effect analysis

摘要： 利用生物技术改良柴达木盆地弃耕盐碱地,3年结果表明,全盐量随着苜蓿种植年限的增加而降低.0～30cm耕作层全盐量由试验前的1.518%下降到0.12%,脱盐率达91.7%,盐分表聚现象已不明显.土壤盐分季节变化呈U型曲线,建植人工草地后,初级生产力明显提高.试验区植物群落的物种数、多样性指数、均匀度均高于对照区.

关键词: 柴达木盆地, 生物措施, 弃耕盐碱地, 效应分析