科技新发现:猪粪与硅藻土共堆肥中氮转化的途径和机制发表时间:2022-07-21 21:09 西北农林科技大学资源与环境学院张增强教授团队将不同比例硅藻土掺入猪粪和木屑堆肥体系,研究了堆肥过程中氮的转化途径和机制。相关成果发表于Bioresource Technology(IF=7.539)。 •Diatomite (DM) had no obvious negative effect on maturity of composts. •DM promoted the transformation from NH4+-N to AAN and HUN, and thus reduced N loss. •The optimum added dosage of DM in pig manure composting was at 10% among 0–20%. •10% DM reduced the relative abundance of narG, nirS, nirK and nosZ. 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 NH4+-N to amino acid nitrogen and hydrolysis undefined nitrogen, then reduced NH3 and N2O 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%.
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假定每天喝的水都是不纯真的,带有许多杂质的,那么,将会严重影响身体状况,而身体健康又是打开一切活动的前提,假定人类没有一个健康的身体,那么,现如今的这一切社会临蓐安眠将不会顺利的打开。硅藻土助滤剂,它能够有用的点窜水质,然后担保人类的身体健...
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