College of Life Science, Northeast Agricultural University, Harbin 150030, China.
College of Life Science, Heilongjiang University, Harbin 150080, China.
Bioresour Technol. 2018 Aug;262:221-228. doi: 10.1016/j.biortech.2018.04.088. Epub 2018 Apr 24.
This study aimed to investigate different transformation mechanisms of organic nitrogen (N) fractions during composting with different raw materials, and the contributions of bacterial communities and environmental factors to organic N fractions transformation. The results showed that high molecular weight organic N was first degraded to low molecular weight organic N and then turned into NH during chicken manure composting. In comparison, organic N fractions were stored in composts rather than mineralization during garden waste and municipal solid waste composting. Meanwhile, bacterial communities, environmental factors and the combination of them were the main drivers of N transformation during chicken manure, municipal solid waste and garden waste composting, respectively. In conclusion, the proposed organic N transformation mechanisms in this study provided a theoretical basis for improving the quality of compost products.
本研究旨在探讨不同原料堆肥过程中有机氮（N）形态转化的不同机制，以及细菌群落和环境因素对有机 N 形态转化的贡献。结果表明，鸡粪堆肥过程中，高分子量有机 N 首先降解为低分子量有机 N，然后转化为 NH。相比之下，在花园废物和城市固体废物堆肥过程中，有机 N 形态被储存在堆肥中而不是矿化。同时，细菌群落、环境因素及其组合分别是鸡粪、城市固体废物和花园废物堆肥中 N 转化的主要驱动因素。总之，本研究提出的有机 N 转化机制为提高堆肥产品质量提供了理论依据。
