河北农业大学学报2025，Vol.48Issue(2)：17-25,9.DOI:10.13320/j.cnki.jauh.2025.0020
规模化羊场粪便堆肥碳氮比优化研究
The optimization of carbon/nitrogen ratio for sheep manure composting on large-scale farm
摘要
Abstract
To improve the efficiency and reduce the nutrient losses of manure composting process for large-scale sheep farms in China,this study employed an outdoor simulation composting method to investigate the impact of optimizing carbon/nitrogen ratio(C/N)of sheep manure feedstock on compost quality and losses of carbon and nitrogen,such as emissions of ammonia(NH3),nitrous oxide(N2O),methane(CH4),and carbon dioxide(CO2).Four treatments were setted as T0(C/N 12:1,direct sheep manure composting),and 3 different C/N ratios of T1(C/N 19:1),T2(C/N 25:1),T3(C/N 30:1)in which pine sawdust was used for C/N adjustment.The results showed that the thermophilic period of the T1,T2,and T3 treatment occurred faster and lasted longer than that of the T0 treatment during the composting process,indicating an improved sheep manure composting efficiency.Comparing with T0,the T1,T2 and T3 treatments reduced the NH3 emissions by 17.9%,45.8%and 58.2%,N2O emissions by 21.1%,27.7%and 44.9%,and CH4 emissions by 51.4%,93.3%,and 83.8%,respectively.Meanwhile,the cumulative CO2 emissions of T1,T2,and T3 treatments were 64.1%,55.3%,and 51.5%higher than that of the T0,respectively,which might correspond to their longer thermophilic periods and the resultant higher material degradation rate.Additionally,the T1,T2,and T3 treatments significantly increased the seed germination index of sheep manure compost and reduced the conductivity(EC)of the compost compared to T0.In conclusion,optimization of the C/N ratio for large-scale sheep manure composting can not only improve the composting efficiency and quality of sheep manure,also significantly reduce N loss and greenhouse gas emissions during the composting process,and the T2 appeared to be the better treatment for the reductions of nitrogen loss and greenhouse gas emissions.关键词
羊粪堆肥/氮损失/氨气/温室气体/碳氮比Key words
sheep manure composting/nitrogen loss/ammonia/greenhouse gas/carbon-nitrogen ratio分类
农业科技引用本文复制引用
吴迪,廖文华,耿仕呈,白贻超,景悦杨,刘春敬,高志岭..规模化羊场粪便堆肥碳氮比优化研究[J].河北农业大学学报,2025,48(2):17-25,9.基金项目
河北省重点研发项目(21327303D) （21327303D）
国家自然科学基金项目(42375170). （42375170）
