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[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。
[Objective] The research aimed to compare the degradation of soil salinity by vetiver, alfalfa and clover. [Method] The vetiver, alfalfa and clover cultivated in the same soil were regularly and quantitatively irrigated with different grades of NaCl solution or K2SO4 solution. The survival rate, the tillering rate and the biomass of vetiver, alfalfa and clover Volume accumulation rate and the amount of salt content in plants and soil salinity reduction, and further compared the quality of salinity, alfalfa and clover soil absorption capacity and ability to degrade the amount of salt. [Result] Vetiver, alfalfa and clover all had certain ability to degrade salinity in soil, and alfalfa had the strongest ability, followed by vetiver and clover. [Conclusion] The ability of vetiver, alfalfa and clover to degrade salinity in soil was related to the salinity in the soil. At the same time, their absorption of salinity in the soil was selective.