Poyang Lake Eco-economy Research Center, Jiujiang University, Jiujiang 332005, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Bioresour Technol. 2019 Jan;272:10-18. doi: 10.1016/j.biortech.2018.09.135. Epub 2018 Sep 28.
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.
本研究确定了不同类型生物炭添加对水稻秸秆堆肥过程中细菌群落结构及其代谢功能的动态变化。结果表明，小麦和玉米秸秆生物炭的添加均极大地提高了温度和发芽指数。生物炭的添加影响了堆肥中微生物群落结构和代谢特征。厚壁菌门、放线菌门和变形菌门是整个过程中的主要门，生物炭的添加均显著增加了放线菌门的相对丰度，尤其是糖单孢菌属。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随着生物炭的添加而增加。此外，总氮受生物炭添加的强烈影响，对细菌群落结构的影响最大。这些结果表明，生物炭的添加提高了堆肥产品的成熟度和肥力，并且在堆肥过程中显著调节了微生物群落结构和功能。
