| Dairy manure is a by-product of cow raising, thousands of tons of Dairy manure are wasted because there is no good ways to make use of it in China, also, it will pollute environment. The vermicomposting is one of novel ways to manage organic wastes and it is in use in many countries. The manage ways is depend on the ability of earthworm that has a big appetite in rot food, in the process of management, the dairy manure which has proceed a appreciate compost is feed to special earthworm and it become vermicompost and body of earworm by the metabolism of the earworm.Three experiments are conducted in this study to elaborate the economical feasibility of the ways in a industrial scale, and evaluate the advantage between compost and vermicomposting in dairy manure management and the effect of vermicompost on the growth and quality of lettuce, and research the mechanism that vermicompost prompt the growth of plants. 1.The experiment of composting and vermicomposting with dairy manurewe have study the changes of physical, chemical and biochemical properties of the dairy manure before and after composting and vermicomposting. The result implies that content of totle N, totle P, and totle K of dairy manure have increased 31.2%, 123.4%, and 22.7% respectively, and valid N and valid P have significantly increased 149.5%, 128.4% respectively while valid K has increased 12.5% slightly, however, the content of organic C, the ratio of C and N, and bulk density of dairy manure have decreased 24.7%, 42.4%, and 44%. The pH reduced from 8.9 to 7.4 and EC from 4.78 to 3.45; the content of microbial C and microbial N have increased significantly after 15 days composting that followed 45 days vermicomposting. But it is not same changes in composting of dairy manure after 60 days, the result implies that content of totle N, totle P, and totle K of dairy manure have increased 27.7%, 110.8%, and 25% respectively, valid N and valid K have decreased 24.2%... |
PDF Full Text Request