| The feasibility of chicken dung as microbial fertilizer carrier was explored in this study. After the irradiation treatment, the dried or fermented chicken dung was used as carrier. Then, Bacillus azotofixans, Bacillus megaterium, Bacillus mucilaginosus and Bacillus subtilis were severally inoculated on the carrier to produce microbial fertilizer. By comparing with the coal cinder support, the treatment condition of chicken dung was optimized by determining the number of living bacteria and the rate of mixed bacteria. The effects of preservation time, temperature, irradiation and pH value on the stability of the microbial fertilizer were discussed. After composting and irradiating treatment, the chicken dung support exhibited the better performance. The preservation time of Bacillus azotofixans and Bacillus mucilaginosus microbial fertilizer was 6 months, while the preservation time of Bacillus megaterium and Bacillus subtilis microbial fertilizers could reach 9 months. It was found that the number of living bacteria was small and the rate of mixed bacteria was high when these microbial fertilizers were under solar irradiation for 3 months. In contrast, the number of living bacteria was large and the rate of mixed bacteria was low when these microbial fertilizers were stored in the dark. In addition,if the microbial fertilizers were kept over 30℃, the number of living bacteria sharply decreased and the rate of mixed bacteria remarkably increased. Adjusting the pH of microbial fertilizersto 7 was helpful to increase the number of living bacteria. Chicken dung can act as a support of microbial fertilizer. Keeping the microbial fertilizer in the dark and dry air can increase the number of living bacteria and thus prolong the preservative time. |
