猪粪与硅藻土共堆肥过程中氮转化的途径和机制。
Pathways and mechanisms of nitrogen transformation during co-composting of pig manure and diatomite.
机构信息
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
College of Resources and Environmental Sciences, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, 100193 Beijing, China; Organic Recycling Institute (Suzhou) of China Agricultural University and Suzhou ViHong Biotechnology, Wuzhong District, 215128 Jiangsu Province, China.
出版信息
Bioresour Technol. 2021 Jun;329:124914. doi: 10.1016/j.biortech.2021.124914. Epub 2021 Mar 1.
The aim of this study was to investigate the pathways and mechanisms of nitrogen transformation during the composting process, by adding diatomite (0%, 2.5%, 5%, 10%, 15% and 20%) into initial mixtures of pig manure and sawdust. The results revealed that diatomite facilitated the conversion from NH-N to amino acid nitrogen and hydrolysis undefined nitrogen, then reduced NH and NO emission by 8.63-35.29% and 14.34-73.21%, respectively. Moreover, the structure and abundance of nitrogen functional genes provided evidence for nitrogen loss. Furthermore, compared with the control (0.03), the treatment blended with 10% diatomite (T3) had the highest value in composting score (-1.27). Additionally, the ratio of carbon and nitrogen (57.30%) was vital for reducing nitrogen loss among all physio-chemical parameters in this study. In conclusion, adding diatomite was a practical way to enhance nitrogen conservation and increase quality of end products, and the optimum added dosage was at 10%.
本研究旨在通过在猪粪和木屑初始混合物中添加硅藻土（0%、2.5%、5%、10%、15%和 20%），来研究堆肥过程中氮转化的途径和机制。结果表明，硅藻土促进了 NH-N 向氨基酸氮和水解未知氮的转化，然后分别减少了 8.63-35.29%和 14.34-73.21%的 NH 和 NO 排放。此外，氮功能基因的结构和丰度为氮损失提供了证据。此外，与对照组（0.03）相比，添加 10%硅藻土的处理组（T3）在堆肥评分（-1.27）中具有最高值。此外，在本研究的所有理化参数中，碳氮比（57.30%）对于减少氮损失至关重要。总之，添加硅藻土是一种增强氮素保存和提高终产物质量的实用方法，最佳添加剂量为 10%。
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