Study on the Colonization and Fermentation of Bacillus subtilis GX7 in Chicken Manure

Purpose The purpose of this study was researching in the colonization ability of Bacillus subtilis GX7 in chicken feces, and what was the effect of GX7 in the the process of chicken manure fermentation.

Method B. subtilis GX7 was labeled with antibiotics. Some parameters were determined, which were the parameters of no agent, adding GX7 agent and adding compound agent, including water content, total nitrogen, total phosphorus, total potassium and total organic carbon.

Result GX7 had good colonization ability in chicken feces. In the compost fermentation experiment of chicken feces,10 days later, after GX7 return into the chicken feces, the number of viable bacteria could be achieved 1.3×10² CFU/g. The fermentation time of adding compound bacteria agent was shortened by 3-5 days. The water content decreased to 29.0%, 23.2% and 22.1%, respectively. The total phosphorus content increased to 0.98%, 1.02% and 1.12%. Total potassium content increased to 2.53%, 2.55% and 2.65%. The organic carbon content decreased by about 10%.

Conclusion As a bacterial agent of a single strain, GX7 plays a certain role in the high temperature stage of compost fermentation, but its effect was limited.