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[目的]为了比较香根草、苜蓿和三叶草对土壤盐分吸收能力的优劣。[方法]采用不同等级的NaCl溶液或K2CO3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。通过5个月试验研究,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,并比较了香根草、苜蓿和三叶草吸收土壤中盐分的质量和能力。[结果]香根草、苜蓿和三叶草都对土壤中盐分有吸收能力,且苜蓿对土壤盐分吸收能力最强,香根草对土壤盐分吸收能力次之,三叶草对土壤盐分吸收能力最弱。[结论]香根草、苜蓿和三叶草对土壤中盐分的吸收能力与土壤盐度有关,同时对土壤中盐分的吸收是有选择性的。
[Objective] The purpose of this study was to compare the superiority and inferiority of vetiver, alfalfa and clover on soil salinity absorption. [Method] With different grades of NaCl solution or K2CO3 solution, vetiver, alfalfa and clover cultivated on the same soil were regularly and quantitatively irrigated. Through 5-month experimental study, the survival rate, tillering rate and biomass accumulation rate of vetiver, alfalfa and clover as well as the salt content in the plant were analyzed. The contents of salt in the soils absorbed by vetiver, alfalfa and clover The quality and ability. [Result] Vetiver, alfalfa and clover all had the ability of absorbing salinity in the soil, and alfalfa had the strongest ability to absorb salinity of soil, followed by the ability of vetiver to absorb salinity of soil, and clover was the weaker to salinity of soil. [Conclusion] The absorptive capacity of vetiver, alfalfa and clover on soil salinity was related to soil salinity, and at the same time it was selective for the absorption of salinity in soil.