Effects of Microbial Agents on Mixed Composting of Pig Manure and Rice Chaff
This study aims to reveal the effects of microbial agents on pig manure composting.Two bacterial strains(Bacillus subtilis and Saccharomyces cerevisiae)with strong organic matter-decomposing capabilities and high temperature tolerance selected in the previous study were used in this study.The composting experiment was conducted with three treatments:no addition of microbial agent(CK),addition of microbial agent 1(T1),and addition of microbial agent 2(T2).The results showed that the addition of two microbial agents accelerated the temperature rising of the compost,and T2 outperformed T1.The addition of the two microbial agents reduced the conductivity of the compost to attenuate the possible soil salinization caused by composting,and T2 outperformed T1.Compared with CK,the addition of microbial agents increased the germination index of seeds and reduced the toxicity to plants,with similar effects between T1 and T2.In addition,adding microbial agents reduced the nitrogen loss of the compost compared with CK,and the effect of T2 was better than that of T1.In conclusion,the two strains can improve the composting efficiency,reduce the nitrogen loss,and help to address the environmental problems caused by composting.
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