,the poultry excrement disperses into in the environment without effec- tive processing,and causes water resource poisoned,atmosphere pollution,the dissemina- tion germ,the harm of farmland and so on.

By applying the circular economic theory,poultry excrement can be converted into resources to reduce environment pollution and enhance the efficiency of resources utilization,which has great economic and ecological benefits.

Through the comparative trials adding or not adding the humic acid into the poultry excrement fermentative process,we surveyed and evaluated the C/N,the pH value,the temperature,the water content and so on.

Dynamic changes of organic nitrogen forms during the composting of different manures;

Rapid and timely information on manure nutrient content offers potential benefits in reducing environment contamination from over-use nutrients and better matching of manure nutrient with fertilizer.

Aiming at making good use of the manures of cows, hogs and hens, this study firstscreened out the phosphate-solubilizating bacteria and potassium bacteria from differentoriginal samples, and then carried out the physiological biochemistry and the molecularidentification on them.

Dynamic changes of nitrogen forms in livestock manure during composting and relevant evaluation indices of compost maturity;

NH_3 volatilization and the control methods during aerobic thermophilic composting treatment of livestock manure;

A simple, quick and low-cost method for treatment of livestock manure.;

The characteristic and feasible analysis of animal manure utilization by thermo-chemical conversion technology;

Pollution and utilization of animal manure as natural resources in Erhai flat shore zone;

Effectively develop the resource of recycling animal manure to prepare bio-organic fertilizer;