College of Life Science, Northeast Agricultural University, Harbin 150030, China; School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Bioresour Technol. 2021 Jul;332:125129. doi: 10.1016/j.biortech.2021.125129. Epub 2021 Apr 7.
This study investigated effects of high-nitrogen source (urea) (R_UR) and protein-like nitrogen source (chicken manure) (R_CM) on humification process during lignocellulose biomass composting. It demonstrated that decreasing ratio of crude fiber (CF), polysaccharide (PS) and amino acids (AAs) in R_CM (29.75%, 53.93% and 73.73%, respectively) was higher than that in R_UR (14.73%, 28.74% and 51.92%, respectively). Humic substance (HS) concentration increased by 7.51% and 73.05% during R_UR and R_CM composting, respectively. The lower total links, more independent modularization and higher proportion of positive correlations between functional bacteria and organic components was observed with R_CM network than R_UR, indicating that protein-like nitrogen source supply may alleviate competition within bacterial community. Moreover, chicken manure supply favorably selects greater special functional bacterial taxa (Pusillimonas, Pedomicrobium, Romboustia and other 24 genus) related to AAs and stimulates the collaborative division of bacterial community. This is significance for strengthening effective transformation of organic components.
本研究考察了高氮源（尿素）（R_UR）和蛋白源（鸡粪）（R_CM）对木质纤维素生物质堆肥腐殖化过程的影响。结果表明，R_CM 中粗纤维素（CF）、多糖（PS）和氨基酸（AA）的比例降低（分别为 29.75%、53.93%和 73.73%）高于 R_UR（分别为 14.73%、28.74%和 51.92%）。R_UR 和 R_CM 堆肥过程中腐殖质（HS）浓度分别增加了 7.51%和 73.05%。与 R_UR 相比，R_CM 网络中功能细菌与有机成分之间的总联系较少，独立性模块化程度更高，正相关比例更高，表明蛋白源氮的供应可能缓解了细菌群落内的竞争。此外，鸡粪的供应有利于选择与 AA 相关的更大的特殊功能细菌类群（如 Pusillimonas、Pedomicrobium、Romboustia 等 24 个属），并刺激细菌群落的协同分工。这对于加强有机成分的有效转化具有重要意义。
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