The present study determined the dynamic changes of bacterial community structures and its metabolism functions in rice straw composting process with different types of biochar addition. Results showed that both wheat and maize straw biochar addition greatly increased the temperatures and germination index. Biochar addition influenced microbial community structure and metabolic characteristics of the compost. Firmicutes, Actinobacteria and Proteobacteria were the dominant phyla throughout the process, and both biochar addition significantly increased the relative abundance of Actinobacteria phylum, especially genus Saccharomonospora. The abundance of bacterial genes related to amino acid metabolism, carbohydrate metabolism and energy metabolism were also increased with biochar addition. Moreover, total nitrogen was strongly affected by biochar addition and had the greatest influence on the bacterial community structure. These results indicated that biochar addition improved the maturity and fertility of the compost product as well as significantly regulated the microbial community structure and functions during composting process.

本研究确定了添加不同类型生物炭的稻草堆肥过程中细菌群落结构的动态变化及其代谢功能。结果表明，小麦和玉米秸秆生物炭的添加大大提高了温度和发芽指数。添加生物炭会影响堆肥的微生物群落结构和代谢特性。在整个过程中，硬毛菌，放线菌和变形杆菌是主要的门，并且两种生物炭的添加均显着增加了门放线菌的相对丰度，尤其是糖单孢菌属。。随着生物炭的添加，与氨基酸代谢，碳水化合物代谢和能量代谢相关的细菌基因的丰度也增加了。此外，总氮受生物炭添加的强烈影响，并且对细菌群落结构的影响最大。这些结果表明，添加生物炭改善了堆肥产品的成熟度和肥力，并显着调节了堆肥过程中的微生物群落结构和功能。