红树林土壤微生物对甲胺磷的降解

连续３年（ａ）的试验结果表明：红树林土壤微生物对农药甲胺磷有较强的降解能力,其降解率是同潮带无红树林土壤微生物的２－３倍;红树林土壤中存在着降解甲胺 磷的优势细菌类群,从中筛选得一株高效降解菌,其降解率可达７０％以上（１２ｄ后）;混合菌的降解能力优于单株菌;优势降解菌在一定浓度的甲胺磷、适宜的通气、温度和光照等条件下,可发挥更佳的降解作用;在降解过程中,降解优势细菌类群有着明显菌群变化,那种一直占

DEGRADATION OF METHAMIDOPHOS BY MANGROVE SOIL MICROBES

Degradation of methamidophos by mangrove soil microbes was studied for successive three years. The results indicated ① Mangrove soil microbes had a better ability of methamidophos degradation, and their degradation rate is 2～3 times higher than that of non-mangrove soil microbes. ② There were some dominant populations in mangrove soil, from which a high efficient strain was isolated; the degradation rate of the strain might be as high as 70% (after 12 days), however, the rate of mixed bacteria was higher than that of single strain. ③ The dominant bacteria had stronger degradation ability under a certain concentration of methamidophos, adaptive ventilation, temperature, and light . ④ The obvious changes of strains in dominant populations could be observed during the course of degradation, of which the "engineering strain” can be sifted out of the dominant strains from beginning to end. ⑤　Multiple environmental effects and economic benefits could be further verified in mangrove soil microbes as well. Fig 5, Tab 5, Ref 4