【摘要】 HLZ菌株在液体培养基中能高效降解甲基异柳磷,通过研究菌株HLZ在土壤中的降解特性为该菌株应用于污染土壤的生物修复提供可行性依据。HLZ菌株对土壤中甲基异柳磷的降解进程实验表明,该菌株2d内对200mgkg-1的土样中甲基异柳磷的降解率达83.6%,且24h内的降解速度很快,降解率达75%;通过测定不同深度土层中的HLZ菌体数量发现HLZ菌株在土壤中具有一定的移动性,主要集中在3~9cm的土层,且甲基异柳磷的降解效果与HLZ菌株的分布密度成正相关;施加方法的比较试验表明拌匀比表施的降解效果好;HLZ菌株对菜园土中甲基异柳磷的降解小试表明,该菌株在自然环境下2d内对菜园土中的甲基异柳磷降解率达85%,是有机磷农药污染土壤生物修复的良好材料。更多还原

【Abstract】 Bacterium HLZ could degrade isofenphos- methyl well in liquid medium. Degrading- characterization in soils of HLZ strains was studied in order to use the strains in bioremediation of contaminated soil. The experiment of degradation process showed that strains HLZ could degrade isofenphos- methyl in soils at a rate of 83.6% in 2 days, and the degrading- speed in 24 h was fast at the degradation rate of 75%. By measuring the number of HLZ cells of different depths it was found that HLZ strains had a certain degree of mobility in the soil, and mainly distributed in 3 - 9 cm. The degradation efficiency and the density of strain HLZ distribution were positively correlated. The infliction method test showed that the degradation efficiency of commixing was better than inflicting on the surface. The test of degradation in garden soil showed that by infliction method of commixing HLZ strains could degrade isofenphos- methyl in the garden soil at a rate of 85 in 2 days.更多还原