Biochar combined with gypsum reduces both nitrogen and carbon losses during agricultural waste composting and enhances overall compost quality by regulating microbial activities and functions
文献类型： 外文期刊
作者： Qu, Jisong 1 ; Zhang, Lijuan 2 ; Zhang, Xu 1 ; Gao, Lihong 1 ; Tian, Yongqiang 1 ;
作者机构： 1.China Agr Univ, Coll Hort, Beijing Key Lab Growth & Dev Regulat Protected Ve, Yuanmingyuan West Rd 2, Beijing 100193, Peoples R China
2.Ningxia Acad Agr & Forestry Sci, Inst Germplasm Resources, Huanghe East Rd 590, Yinchuan 750002, Ningxia, Peoples R China
关键词： Biochar; Flue gas desulfurization gypsum; Composting performance; Potential ecological risk; Overall compost quality; Agronomic value
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）
ISSN： 0960-8524
年卷期： 2020 年 314 卷
页码：
收录情况： SCI
摘要： Composting is an efficient method for treating agricultural wastes. This study investigated the effects of the addition of biochar (B) and gypsum (G) to straw mixed with chicken manure (SC) (i.e. SC, SC + B, SC + G and SC + B + G) on composting performance at different initial C/N ratios (20, 25 and 30). In general, biochar combined with gypsum (BCG) efficiently shortened composting time and reduced N loss, C loss and potential ecological risk. It also enhanced lignocellulose decomposition, nutrient retention and the overall compost quality expressed by a compost quality index (CQI), and increased the biomass of four different test crops. The BCG-induced increase in CQI was closely associated with microbial enzyme activities and C catabolic profiles. These results indicated that the combination of biochar and gypsum is more effective than each single additive during composting, and emphasized that microbial activities and functions play pivotal roles in determining compost quality and thereby agronomic performance.
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