Abstract：The effect of extracellular enzymes of Phanerochaete Chrysosporium on the lignocellulose degradation and the succession of microbial community in agricultural waste composts were studied. Extracellular enzymes had negative effect on total quinone content in the initial stage of composting, but this inhibitory effect decreased gradually along with the composting process. At the end of composting, the extracellular enzymes improved the diversity and evenness of the microbial community, and significantly increased the degradation amount of lignin and hemicellulose. The quinone profile showed that the bacteria indicated by MK-7 as major quinone were predominant after the mesophilic phase, and there was no new dominant microbe found in the composting with the enzyme additive. But extracellular enzymes had great positive effects on menaquinones and promoted the amount of long-chain menaquinones during the final phase of composting. The principal component analysis indicated that the greater effects of extracellular enzymes on the microbial community were observed on 3 d and 40 d than other days, which was consistented with the dissimilarities analysis result. In addition, the extracellular enzymes enhanced the effect of fungi in the whole system.
