Effects of different organic materials and their composting levels on soil microbial community
有机物料种类及腐熟水平对土壤微生物群落的影响

In this paper,a pot experiment with tomato and different organic material amendment was installed in a greenhouse,and the diversity of soil microbial communities and their utilization pattern of amine,amino acid,carbohydrate,carboxylic acid,polymer and miscellaneous were assessed by Biolog method at 60 days after amendment.The results showed that organic material amendment could improve soil microbial community diversity.Fresh distiller grain amendment was a little bit better than its 10 days composting,and the composting level of cow manure had a significant positive or negative effect on the microbial diversity.Among the six carbon sources,the utilization of carbohydrate by soil microbial communities was the highest,and the microbial communities in soils amended with distiller grain had a significantly higher utilization of polymer,relative to those in soils amended with cow manure.