| 接种Penicilliumsp.和根际分泌物对土壤甲磺隆的协同降解研究 |
| 摘要点击 1642 全文点击 1393 投稿时间：2006-01-14 修订日期：2006-03-28 |
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| 中文关键词 甲磺隆 生物降解 Penicillium sp. 根际分泌物 |
| 英文关键词 metsulfron-methyl bioremediation Penicillium sp. root exudates |
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| 中文摘要 |
| 通过接种Penicillium sp.和模拟小麦根际环境的方法，研究了甲磺隆在Penicillium sp.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Penicillium sp.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Penicillium sp.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Penicillium sp.对甲磺隆的降解具有可持续性. |
| 英文摘要 |
| 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. |
