College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China.
College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China.
Sci Total Environ. 2024 Nov 20;952:175953. doi: 10.1016/j.scitotenv.2024.175953. Epub 2024 Sep 1.
Aerobic composting has been used as a mainstream treatment technology for agricultural solid waste resourcing. In the present study, we investigated the effects and potential mechanisms of the addition of a microbial agent (LD) prepared by combining Bacillus subtilis, Bacillus paralicheniformis and Irpex lacteus in improving the efficiency of cattle manure composting. Our results showed that addition of 1.5 % LD significantly accelerated compost humification, i.e., the germination index and lignocellulose degradation rate of the final compost product reached values of 92.20 and 42.29 %, respectively. Metagenomic sequencing results showed that inoculation of cattle manure with LD increased the abundance of functional microorganisms. LD effectively promoted the production of humus precursors, which then underwent reactions through synergistic abiotic and biotic pathways to achieve compost humification. This research provides a theoretical basis for the study of microbial enhancement strategies and humus formation mechanisms in the composting of livestock manure.
好氧堆肥已被用作农业固体废物资源化的主流处理技术。在本研究中，我们研究了添加微生物制剂（LD）对牛粪堆肥效率的影响及其潜在机制。LD 是由枯草芽孢杆菌、地衣芽孢杆菌和栓菌复合制备的。结果表明，添加 1.5%的 LD 可显著加快堆肥腐殖化，即最终堆肥产品的发芽指数和木质纤维素降解率分别达到 92.20%和 42.29%。宏基因组测序结果表明，LD 接种牛粪可增加功能微生物的丰度。LD 有效地促进了腐殖质前体的产生，然后通过协同的非生物和生物途径进行反应，从而实现堆肥腐殖化。这项研究为研究家畜粪便堆肥中微生物强化策略和腐殖质形成机制提供了理论依据。
