【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.更多还原

【Abstract】 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 soil 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.更多还原