| To find out the suitable microbial agents to the local manure composting condition, the effects of three kinds of exogenous microbial agents on the cow manure composting were studied. Variations of temperature and humic acid during composting process were investigated in this study. The results showed that all three kinds of exogenous microbial agents increased temperature quickly and prolonged the high temperature period; Agent 2 and Agent 3, which are effective of accelerating transformation and synthesis of total humic acid and the water soluble humic acid, had no obvious effects on the free from humic acid. The humic acid and humification index of Agent 3 treatments were higher than those of the other treatments. There were significant differences between the control and Agent 3 treatments. The content of fulvic acid in all treatments was fundamentally the same at the end of composting, indicating that the exogenous microbial agents had no effects on it. |
