Study on Isolation and Identification of One Atrazine Degrading Strain and Its Degradation Characteristics

摘要

Under the Outdoors temperature of -13°C, the corn soil (0-10cm) of long-term applying atrazine was collected in Heilongjiang Province. From the collected soil, we isolated a strata which the ability of atrazine degrading was relatively high named Z{sub}9 under the condition of using atrazine as sole carbon and nitrogen source. The configuration photos of Z{sub}9 were observed by using optic microscope and SEM. These photos showed the shape of Z{sub}9 was short bacilliform. Byphysiological and biochemical characteristics testing, the preliminary identifications indicated that Z{sub}9 belongs to Microbacterium sp. Through different experiments, we known that the suitable condition for Atrazine degrading strain Z{sub}9 was: atrazine concentration was 100mg·L{sup}(-1), pH was 7, temperature at 30°C. Under these condition, after 12 days cultivation, the degradation rate of Atrazine can reach 75.4%.