摘要
合理使用外源添加剂可减少畜禽粪污堆肥中温室气体排放并提高堆肥品质.以玄武岩和闪长岩尾矿残渣为研究对象,探究其对堆肥品质及堆肥过程中二氧化碳和甲烷排放以及碳素转化固存的影响.结果表明,与对照一致,10%玄武岩和闪长岩尾矿残渣处理堆肥产物的堆温、pH、有机质和总养分含量等均满足NY/T 525-2021有机肥标准,且尾矿添加有助于降低堆体湿度,提高堆肥产物种子发芽指数,促进有机质和氮磷钾总养分累积.其中,玄武岩处理堆肥有机质损失率相比对照处理从15.6%降低至2.6%,总养分累积率从101%提高至114.6%,并有助于猪粪堆肥中的碳素固定.相比对照处理,玄武岩尾矿残渣处理总有机碳损失率从15.6%下降至2.9%,非可溶性有机碳累积,堆肥二氧化碳和甲烷累计排放量分别降低了23.5%和24.4%,堆肥产物的腐殖化系数提高了56.3%.核磁共振碳谱分析进一步指出,尾矿残渣添加促进猪粪堆体中木质纤维素类组分分解,并向更为稳定的芳香族碳转变.研究可为尾矿残渣和畜禽粪便高效低碳的协同资源化利用提供重要理论和技术支撑.
The appropriate use of external additives can reduce greenhouse gas emissions from livestock manure composting and improve compost quality.Using basalt and diorite tailings as subjects,this study investigates the effects of these tailings residues on compost quality,carbon transformation,and retention,as well as CO_(2) and CH4 emissions during the composting process.The results showed that,similar to the control compost,the compost products with 10%basalt and diorite tailings residue treatments met the NY/T 525-2021 organic fertilizer standards in terms of heap temperature,pH,organic matter,and total nutrient content.This addition also reduced moisture,improved the seed germination index,and supported organic matter and total nutrient(N,P,and K)accumulation.Notably,in the basalt treatment,organic matter loss rate decreased from 15.6%to 2.6%compared to that in the control,and total nutrient accumulation increased from 101%to 114.6%.The addition of basalt tailings aided in carbon stabilization within pig manure compost.Compared to that in the control treatment,the total organic carbon loss rate in the basalt tailings residue treatment decreased from 15.6%to 2.9%.Non-soluble organic carbon accumulated,CO_(2) and CH4 cumulative emissions from composting were reduced by 23.5%and 24.4%,respectively,and the humification coefficient of the compost product increased by 56.3%.Nuclear magnetic resonance carbon spectroscopy further indicated that the addition of tailings residues promoted the decomposition of lignocellulosic components in the pig manure heap,facilitating their transformation into more stable aromatic carbon.The study provides important theoretical and technical support for the efficient,low-carbon,and synergistic recycling of tailings and livestock manure.
作者
吕少康
黄欣悦
叶静
孙万春
史非凡
成琪璐
马军伟
郑华宝
林辉
LÜ Shao-kang;HUANG Xin-yue;YE Jing;SUN Wan-chun;SHI Fei-fan;CHENG Qi-lu;MA Jun-wei;ZHENG Hua-bao;LIN Hu(School of Environment&Resource Sciences,Zhejiang A&F University,Hangzhou 311300,China;Institute of Environment,Resource,Soil&Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China)
出处
《环境科学》
北大核心
2025年第12期8122-8132,共11页
Environmental Science
基金
浙江省重点研发计划项目(2022C02045)。
关键词
尾矿残渣
好氧堆肥
腐熟度
碳转化
固碳减排
tailings residues
aerobic compost
maturity
carbon conversion
carbon sequestration and emission reduction
