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抗生素菌渣堆肥进程中微生物群落的变化

Keywords: 抗生素菌渣,堆肥,微生物群落

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Abstract:

将青霉素菌渣、林可霉素菌渣与牛粪等原料分别进行好氧堆肥实验,以考察堆肥过程中不同菌渣对微生物群落的影响。在堆制的41d里,根据温度变化分阶段采集堆肥样品,采用稀释倒平板法测定细菌、放线菌和真菌的数量。结果表明,菌渣不同,其堆肥中的微生物群落变化趋势不同。青霉素菌渣堆肥中细菌数量变化趋势为高-低,真菌数量变化趋势为高-低-高,放线菌数量为逐渐增加;林可霉素菌渣堆肥过程中细菌数量变化趋势为低-高-低,放线菌和真菌数量变化趋势为高-低-高。依据真菌菌落形态观察,菌渣堆肥中的真菌种类比对照牛粪堆肥单一,表明两种菌渣对堆肥中的微生物多样性均产生了不利影响。林可霉素菌渣堆肥初始时的细菌数量比对照低1个数量级,放线菌数量在整个堆肥进程中都明显低于对照,堆肥结束时,随着菌渣含量的增加,放线菌数量逐渐下降,高温期真菌数量下降幅度随着菌渣含量增加而加大,表明林可霉素菌渣对细菌、放线菌和真菌均有不同程度的抑制。堆肥化后菌渣中林可霉素残留量的减少表明,在一定条件下堆肥处理可以将抗生素菌渣无害化和资源化。

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