Screening and application effect of microbial strains for duck manure fermentation

Eight deodorizing strains and two fecal thermophilic strains were isolated from fresh duck feces samples. Among the 8 deodorizing strains, 3 strains with good deodorizing effect were selected and combined with 2 strains with high temperature, which were used to prepare compound microbial inoculum, and the composting effect was tested. In the composting experiment, natural composting was set as control, and there were two treatments with compound microbial inoculum. The duck manure was fermented and stacked. The results showed that the microbial inoculum treatment could obviously promote the temperature rise of duck manure fermentation, and the high temperature stage lasted for a long time. The C/N value of microbial inoculum treatment was 2.6 lower than that of natural stacking control, and the degree of maturity was higher. Compared with the control, the germination index reached the harmless standard five days earlier, the total nitrogen content increased by 4.08% compared with the natural composting, and the loss rate of nitrogen nutrient content was the lowest. Therefore, the strain composed of microbial inoculum 2 has certain application value in the treatment of duck manure waste.