Effects of sesbania on chlorimuron-ethyl removal and soil microbial community in farmland
Chlorimuron-ethyl is widely used in agricultural production activities.Long-term and heavy usage leads to its residues in the soil,posing potential ecological risks to the ecosystem.In a pot experiment,germination rate and plant growth index of sesbania,a green manure plant,was examined.Soil chlorimuron-ethyl content and micro-bial community structure were analyzed.The tolerance of sesbania to herbicide chlorimuron-ethyl,its remediation effect on chlorimuron-ethyl contaminated soil and influence on soil microbial community were studied.The results showed that sesbania exhibited high tolerance to chlorimuron-ethyl(≤1 mg·L-1)and significantly reduced the residual amount of chlorimuron-ethyl in the soil.Under the 0.4 mg·kg-1 chlorimuron-ethyl treatment,sesbania increased the richness and diversity of soil microbial community.However,their richness and diversity in sesbania rhizosphere soil was decreased under 1 mg·kg-1 chlorimuron-ethyl treatment.Furthermore,sesbania increased the quantity of actinomycetes and acidobacteria in the rhizosphere soil,with the most significant effect being observed in actinomycetes.
phytoremediationchlorimuron-ethylsesbaniamicrobial community
国家科技期刊平台
NSTL
万方数据
