College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Shaanxi Engineering Research Center of Utilization of Agricultural Waste Resources, Northwest A&F University, Yangling, Shaanxi, 712100, China.
J Environ Manage. 2022 Aug 15;316:115308. doi: 10.1016/j.jenvman.2022.115308. Epub 2022 May 21.
Additives can play important roles in effectively inhibiting nitrogen losses during livestock manure composting due to the activities of microbes. This study investigated the effects of adding nanocellulose at 300 mg/kg, 600 mg/kg, and 900 mg/kg (NC900) on nitrogen conversion, nitrogen conversion functional genes, and related microorganisms during composting. The results showed that compared with the control, nanocellulose hindered the ammoniation reaction. In addition, NC900 promoted nitrification, interfered with the denitrification process, and reduced the abundance of the nirK gene, thereby increasing the nitrate nitrogen content and decreasing ammonia spillover. NC900 promoted nitrogen fixation by increasing the abundance of members of Rhizobiales, which play important roles in nitrogen fixation. In general, compared with the control, NC900 improved the retention of nitrogen by controlling ammonia emissions. The results obtained in this study demonstrate that nanocellulose can be applied in the treatment of organic solid waste and agricultural production.
添加剂可以通过微生物的活动在有效抑制畜禽粪便堆肥过程中的氮素损失方面发挥重要作用。本研究探讨了添加纳米纤维素（NC900）300mg/kg、600mg/kg 和 900mg/kg 对堆肥过程中氮转化、氮转化功能基因和相关微生物的影响。结果表明，与对照相比，纳米纤维素抑制了氨化反应。此外，NC900 促进了硝化作用，干扰了反硝化过程，降低了 nirK 基因的丰度，从而增加了硝态氮含量并减少了氨溢出。NC900 通过增加在固氮中起重要作用的根瘤菌目成员的丰度来促进固氮。总的来说，与对照相比，NC900 通过控制氨排放来提高氮素的保持。本研究的结果表明，纳米纤维素可应用于有机固体废物处理和农业生产中。
