农业环境科学学报2025，Vol.44Issue(1)：194-203,10.DOI:10.11654/jaes.2024-0480
绿肥稻田土壤甲烷减排材料筛选及减排机制研究
Screening of methane abatement materials and reduction mechanisms in green manure paddy soils
摘要
Abstract
Green manure plays an important role in cultivating healthy soil and ensuring high yield and quality of rice.However,it may trigger the increase of CH4 emission from green manure paddy soil for the return of high amount of organic matter to the field,and corresponding control pathways need to be developed.In this study,we investigated the CH4 emission reduction effects of five CH4 abatement materials,including sesbania biochar,calcium peroxide,sulfur,2-chloroethanesulfonate,and goethite,after green manure returned to the paddy soils through simulation experiments,and carried out the mechanism studies for the materials with better abatement effects.The results showed that green manure returned to paddy field increased CH4 emission compared with no green manure(CK),and CH4 emission was reduced by the addition of abatement materials.Among them,the cumulative CH4 emission reduction was smaller with the addition of the sesbania biochar(GM+C)and sulfur(GM+S)compared to green manure alone(GM)19.5%and 23.8%,respectively.And 2-chloroethanesulfonate(GM+CES)showed the best CH4 emission reduction compared to GM,with 66.7%reduction in cumulative CH4 emission and 52.5%reduction in global warming potential(GWP).At the end of the incubation(90 d),compared to GM,the addition of 2-chloroethanesulfonate decreased soil pH by 0.4 units and methanogenic archaea by 29.9%.Random forest modeling and correlation analyses revealed that the abundance of the mcrA gene of methanogenic archaea was significantly and positively correlated with CH4 emission,and this result suggests that methanogenic archaea is an important factor in driving CH4 emission from paddy soil.In summary,CH4 emission can be reduced through the addition of emission-reduction materials to green manure paddy field soils.Among these,2-chloroethanesulfonate demonstrates the best performance in this study,specifically and efficiently inhibiting the methanogenic archaeal community,making it a promising material for future exploration in reducing CH4 emissions.关键词
绿肥/CH4/减排材料/产甲烷古菌/2-氯乙烷磺酸钠Key words
green manure/methane/emission reduction material/methanogenic archaea/2-chloroethanesulfonate分类
资源环境引用本文复制引用
孙晋鑫,周国朋,马正波,梁婷,常单娜,刘佳,刘晗,曹卫东..绿肥稻田土壤甲烷减排材料筛选及减排机制研究[J].农业环境科学学报,2025,44(1):194-203,10.基金项目
国家重点研发计划项目(2021YFD1700200) （2021YFD1700200）
国家自然科学基金项目(32072678,32202609) （32072678,32202609）
国家绿肥产业技术体系项目(CARS-22) National Key Research and Development Program of China(2021YFD1700200) （CARS-22）
National Natural Science Foundation of China(32072678,32202609) （32072678,32202609）
Earmarked Fund for CARS-Green Manure(CARS-22) （CARS-22）
