香根草·苜蓿和三叶草对土壤盐分降解试验研究

目的]为比较香根草、苜蓿和三叶草对土壤盐分的降解能力。方法]用不同等级的NaCl溶液或K2SO4溶液定期、定量浇灌栽培在同质地土壤上的香根草、苜蓿和三叶草,分析香根草的成活率、分蘖率和香根草、苜蓿和三叶草的生物量积累率及植株体内的盐分含量及土壤盐分的减少量,并进一步比较香根草、苜蓿和三叶草吸收土壤中盐分的质量、能力和降解盐分的量、能力。结果]香根草、苜蓿和三叶草都对土壤中盐分都有一定的降解能力,且苜蓿能力最强,香根草能力次之,三叶草能力最弱。结论]香根草、苜蓿和三叶草对土壤中盐分的降解能力与土壤中盐度有关,同时它们对土壤中盐分的吸收是选择性的。

Study on Ablity of Soil Saliniazation Degradation of Veliveria zizanioides ,Alfalfa and Clover

Objective] The research aimed to study the ability of soil saliniazation degratlation of Veliveria zizanioides,alfalfa and clover.Method] The different rank NaCl solution or K2SO4 solution was irrigated to cultivate Veliveria zizanioides,alfalfa and clover that had grown in the same soil.The statistical analysis was made on Veliveria zizanioides survival rate and minute tiller rate and the biomass accumulates rate and salt content in adult plant of Veliveria zizanioides,alfalfa,clover,and the salt’s reduction of the soil.And the quality and ability of the introduction cultivated Veliveria zizanioides,alfalfa and clover absorbing and degrading the salt in the soil were determined.Result] The salinity degradation of Veliveria zizanioides,alfalfa from the soil was strong,and that of alfalfa was stronger than that of Veliveria zizanioides,but the salinity degradation of clover from the soil was weak.Conclusion] The salinity degradation of Veliveria zizanioides,alfalfa and clover from soil was related with the salt content of soil,and the salinity degradation of Veliveria zizanioides,alfalfa and clover was selective.