文档介绍：
咪草烟污染土壤的微生物修复特性研究#
金雷,成明根,黄星**
(南京农业大学生命科学学院)
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摘要:在实验室条件下,研究了降解菌 Bacillus sp. QC-13 对咪草烟污染土壤的生物修复作
用。投加降解菌 QC-13 可显著提高咪草烟在土壤中的降解速率。当咪草烟浓度为 50mg· kg-1
干土,QC-13 的接种量为 108 CFU g -1 干土时,第 21d 土壤中咪草烟的降解率为 %,而
对照土壤中咪草烟的降解率为 %。咪草烟的降解速率和接种量呈正相关,当接种量减少
为 105CFU g -1 干土时,降解率降低为 %。随着土壤中咪草烟浓度升高,降解率则会降
低。土壤中咪草烟浓度达到 100 mg kg-1 时,投加降解菌后土壤中的咪草烟降解率仅为
%。QC-13 降解土壤中咪草烟的最适温度为 30℃,21 d 的降解率可达 %。当土壤含
水量为 40%时,咪草烟的降解率为 %,当含水量增加,降解率则降低。
关键词:环境微生物学;咪草烟;生物修复
中图分类号:
BIOREMEDIATION OF
IMAZETHAPYR-CONTAMINATED SOIL
JIN Lei, CHENG Minggen, HUANGX Xing
(College of Life Sciences,Nanjing Agricultural University)
Abstract: Bioremediation of imazethapyr contaminated soil with QC-13 was studied under
laboratory conditions. Addition of QC-13 could prominently accelerate the degrading of
imazethapyr in soil. When the concentration of imazethapyr was 50mg·kg-1, the inoculation of
QC-13 was 108 CFU·g-1, degradation rate was % after 21 days, whereas the rate was only
% in control group. Degradation rate was related positively to the amount of inoculation.
When the inoculation of QC-13 was 105 CFU·g-1, the degradation rate was %. Low
concentration of imazethapyr in soil was easily for QC-13 to degrade. When the concentration of
imazethapyr increased to 100 mg·kg-1, imazethapyr degradation rate was only %. Soil