摘要
通过接种Penicilliumsp.和模拟小麦根际环境的方法,研究了甲磺隆在Penicilliumsp.和小麦根际分泌物协同作用下的生物降解特性.结果表明,根系分泌物丰富了土著微生物和外源微生物,对甲磺隆的降解具有显著的促进作用.接种Penicilliumsp.的根际土壤中甲磺隆降解半衰期为8.6 d,其降解速率是接种Penicilliumsp.的非根际土壤的1.8倍,是普通根际土壤的2.7倍.继续追加甲磺隆的试验表明,接种菌株Penicilliumsp.对甲磺隆的降解具有可持续性.
Research on the synergistic biodegradation of metsulfuron-methyl in Penicillium sp. inoculated wheat rhizosphere soil was discussed in this paper. Penicillium sp., a high-effective degrading fungi, was inoculated in the soils and root exudates were irrigated during the trial. The degradative characteristics of metsulfuron-methyl and microbial population dynamics of cultivable microorganisms capable of metsulfuron-methyl were investigated in the samples. A larger microbial population is measured in the inoculated rhizosphere soil, which enhances biodegradation of metsulfuron-methyl. The half-life of degradation metsulfuron-methyl in the inoculated wheat-rhizosphere soft is 8.6d, the degradative rate of which is 1.8 times of that in inoculated non-rhizosphere sample, and 2.7 times of that in non-inoculated rhizosphere sample. Add metsulfuron-methyl to the samples again, the soil microorganisms can degrade metsulfuron-methyl sustainably.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第1期199-203,共5页
Environmental Science
基金
国家自然科学基金项目(20077024)
