采用菌剂处理Cr(Ⅵ)污染土壤和坪草幼苗的方式,考察了菌剂对Cr(Ⅵ)污染土壤中坪草幼苗生理生化的影响,结果表明,在植物幼苗生长期辅以菌剂处理,对减少Cr在根中的蓄积有明显效果,而且可提高Cr在坪草叶中生物富集量,同时降低了Cr(Ⅵ)污染土壤中坪草幼苗细胞膜透性和丙二醛(MDA)含量,提高了POD(除高羊茅外)、SOD和CAT保护酶活性。且进一步表明,菌剂可降低Cr(Ⅵ)污染土壤中的Cr(Ⅵ)含量,对Cr(Ⅵ)污染土壤具有一定的改良效果。
Cr(Ⅵ)polluted soil treated with a particular species of microorganism during the growing period was used in pot cultures of seedlings of Festuca arundinacea and Lolium perenne to investigate the effects on physiological and biochemical characteristics of the seedlings in Cr(Ⅵ)polluted soil.Treatment with the microbe during the grass seedling growing period significantly reduced Cr accumulation in the root,but increased it in the leaves.At the same time,the damage to cell membrane permeability and the malondialdehyde(MDA)content as well as the enzyme activities of POD,SOD and CAT were improved.In addition,the microorganism agent reduced Cr(Ⅵ)content in Cr(Ⅵ)polluted soil.Addition of the agent to Cr(Ⅵ)contaminated soil had an improvement effect on the soil.