摘要
植物修复是重金属污染土壤修复治理的重要方法。菌草生物产量高,是土壤重金属植物修复研究与应用的重要对象之一。本试验引进菌草品种四个,选用高Cd (2.16 mg/kg)背景土壤,旨在研究不同品种对不同重金属的吸收积累特性,以期筛选出针对不同重金属污染土壤的修复植物。结果表明:1) 菌草品种地上部生物量,巨菌草最高,其次是巨菌草J1,莱牧1号最低。地上部鲜重,巨菌草和巨菌草J1极显著高于莱牧1号(P 巨菌草J1 】紫菌草 】莱牧1号,其中:巨菌草Cd积累量极显著高于莱牧1号、显著高于紫菌草,巨菌草J1的Cd积累量显著高于莱牧1号;Pb、Cr、As、Hg积累量品种间均无显著差异。可见,巨菌草和巨菌草J1对Cd具有很强的富集能力,而紫菌草对Cr污染治理、莱牧1号对Hg污染治理具有良好的应用潜力。
Phytoremediation is an important method for remediation of heavy metal contaminated soil. The biomass of JUNCAO is high, which is one of the important objects of phytoremediation of heavy metals in soil. Four kinds of JUNCAO were introduced in this experiment, and high CD (2.16 mg/kg) background soil was selected to study the absorption and accumulation characteristics of different varieties of heavy metals, so as to screen out remediation plants for different heavy metal contaminated soil. The results showed that: 1) The aboveground biomass of Giant JUNCAO was the highest, followed by Giant JUNCAO J1, and Laimu No. 1 was the lowest. The aboveground fresh weight of Giant JUNCAO and Giant JUNCAO J1 was significantly higher than that of Laimu No.1 (P Giant JUNCAO J1 >Zijuncao >Laimu No. 1, among which, the Cd accumulation of Giant JUNCAO was significantly higher than that of Laimu No. 1 and was significantly higher than that of Zijuncao 1, and the Cd accumulation of Giant JUNCAO J1 was significantly higher than that of Laimu No. 1;there was no significant difference in Pb, Cr, As and Hg among varieties. It can be seen that Giant JUNCAO and Giant JUNCAO J1 have strong ability to enrich Cd, while Zijuncao and Laimu No.1 have good application potential for Cr pollution control and Hg pollution control.
出处
《农业科学》
2020年第10期771-780,共10页
Hans Journal of Agricultural Sciences
关键词
重金属染污
植物修复
菌草
品种筛选
Heavy Metal Pollution
Phytoremediation
Giant JUNCAO
Variety Screening
