植物–微生物联合修复镍污染土壤研究进展

Research Progress of Plant-microbe Remediation of

土壤健康是粮食安全的保障,人类活动给土壤造成的污染亟待治理。镍是人体必需微量元素,但过量的镍具有较大的毒性。目前我国土壤中镍污染比较严峻,应尽快响应《土壤污染防治行动计划》来改善土壤中镍污染状况。本文综述了植物–微生物联合修复技术的基本原理,微生物在镍污染土壤中对植物生长状况、有效态镍含量以及植物吸收镍的影响,对寻找合适的植物和微生物修复镍污染土壤具有重要意义;最后,提出将有机酸运用到植物–微生物联合修复镍污染土壤中、建立PGPB库和寻找我国超富集植物等下一步研究的重点。

Soil health is the guarantee of food security, and soil pollution caused by human activities needs urgent treatment. Ni is an essential trace element in human beings, but excessive amount of Ni is toxic. At present, Ni pollution in soil is serious in China. The Action Plan for Soil Pollution Control should be responded as soon as possible to improve Ni contamination in soil. This paper summarized the basic principle of the microbe-assisted phytoremediation, and the effects of adding microorganisms in Ni contaminated soil on plant growth conditions, soil available Ni content and plant absorption of Ni, which is of great significance to find suitable plants and microorganisms for remediation of Ni contaminated soil. Meanwhile, this paper also expected the focuses in future research, such as the effect of organic acids on plant-microbe combined remediation,establishment of the PGPB Library and searching for super accumulation plants.