生物炭添加对猪粪堆肥过程碳素转化与损失的影响

发布时间：2019-03-07 19:57

【摘要】：堆肥是最合适的处理农业废弃物的技术之一,但在堆肥过程中,碳素的损失及温室气体的大量排放引起越来越多的关注.因此,如何减少堆肥过程中碳素损失成为堆肥面临的重要问题.本研究以猪粪等为原料,利用强制通风反应箱研究了生物炭添加对堆肥过程中碳素转化及碳素损失的影响.结果表明,在堆肥过程中总有机碳呈下降趋势,添加生物炭处理的总有机碳含量提高了6.69%~20.60%;可溶性有机碳的变化规律与总有机碳相似.腐殖质碳含量呈先下降后上升的变化趋势,添加生物炭处理的腐殖质碳含量下降了0.39%~14.97%;腐殖化系数(胡敏酸/富里酸)与生物炭添加量成正比,说明生物炭添加有利于堆肥的腐熟.至堆肥结束,堆料干物质失重率为23.51%~30.91%,碳素损失率为20.71%~28.85%,添加3%生物炭的处理干物质失重率与碳损失率均最高,添加9%生物炭处理均最低.
[Abstract]:Composting is one of the most suitable technologies for treating agricultural waste, but in the composting process, more and more attention has been paid to the loss of carbon and the emission of greenhouse gases. Therefore, how to reduce the carbon loss in the composting process has become an important problem for composting. The effect of biocarbon addition on carbon conversion and carbon loss during composting was studied in a forced ventilation reactor using pig dung as raw material. The results showed that the content of total organic carbon increased by 6.69% and 20.60%, and the variation of soluble organic carbon was similar to that of total organic carbon. The carbon content of humus decreased at first and then increased. The carbon content of humus decreased by 0.39% and 14.97% when biochar was added. The humification coefficient (humic acid / fulvic acid) is proportional to the addition of biochar, which indicates that biochar addition is beneficial to composting maturity. By the end of composting, the weight loss rate and carbon loss rate were 23.51% / 30.91% and 20.71% / 28.85%, respectively. The treatment with 3% biochar had the highest dry matter loss rate and carbon loss rate, and the addition of 9% biochar treatment had the lowest dry matter loss rate and carbon loss rate.
【作者单位】：福建省农业科学院农业生态研究所福建省红壤山地农业生态过程重点实验室;
【基金】：国家重点研发计划课题(No.2016YFD0501404-3) 福建省自然科学基金项目(No.2015J01102) 福建省发改委“五新”项目~~
【分类号】：S141.4;X713

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