节水灌溉Issue(5)：17-23,31,8.DOI:10.12396/jsgg.2025421
干湿循环老化生物炭对稻田温室气体排放及产量的影响
Effects of Biochar Aged Under Dry-Wet Cycles on Greenhouse Gas Emissions and Rice Yield in Paddy Fields
摘要
Abstract
The carbon sequestration and emission reduction effects of biochar in paddy fields are influenced by its aging process.To this end,a two-year pot experiment was conducted in Nanjing,Jiangsu Province,to investigate the impacts of biochar aged by dry-wet cycles on greenhouse gas(CH4 and N2O)emissions,rice yield,and greenhouse gas intensity(GHGI).Through an indoor incubation experiment(2023),the natural dry-wet cycles of paddy fields(one cycle every 3 days,10 cycles in total)were simulated to pre-age the biochar.Four treatments were established:fresh biochar(C0),3-cycle aged biochar(C3),6-cycle aged biochar(C6),and 10-cycle aged biochar(C10).Gas emissions were measured using the in-situ static chamber method,and GHGI was calculated based on yield data.The results showed that the C6 treatment yielded the optimal carbon sequestration and emission reduction effects.Compared with C0,the C6 treatment significantly reduced the fluxes and cumulative emissions of soil CH4 and N2O(p<0.05):cumulative CH4 emissions decreased by 18.33%and 23.86%in 2023 and 2024,respectively,while cumulative N2O emissions decreased by 11.03%and 15.19%,respectively.Simultaneously,the C6 treatment significantly increased rice yield(p<0.05)by 11.17%and 14.66%in the two years,respectively,and minimized GHGI,showing significant reductions of 25.40%and 32.26%compared to C0(p<0.05).These findings indicate that biochar moderately aged through dry-wet cycles(6 cycles)can optimally achieve the synergistic goals of mitigating greenhouse gas emissions and increasing crop yield in paddy fields.This study provides new strategies and a theoretical basis for the precise application of biochar in agricultural production.关键词
干湿循环/生物炭老化/温室气体排放/水稻产量/排放强度Key words
dry-wet cycles/biochar aging/greenhouse gas emissions/rice yield/emission intensity分类
农业科技引用本文复制引用
杨钦博,江赜伟,王洁,许伊,宋喜山,杨士红,许怡..干湿循环老化生物炭对稻田温室气体排放及产量的影响[J].节水灌溉,2026,(5):17-23,31,8.基金项目
国家自然科学基金项目(52379038) （52379038）
国家重点研发计划青年科学家项目(2024YFC3213600) （2024YFC3213600）
江苏省自然科学基金青年基金(BK20251474) （BK20251474）
中国博士后科学基金(2025M782463) （2025M782463）
常州市科技项目(CJ20250100) （CJ20250100）
中央高校业务费项目(B250201073). （B250201073）
