中国生态农业学报（中英文）2025，Vol.33Issue(7)：1289-1300,12.DOI:10.12357/cjea.20240742
有机替代对砂姜黑土小麦季温室气体排放及净增温潜势的影响
Impact of organic substitution on greenhouse gas emissions and net warming potential during the winter wheat season in Shajiang black soil
摘要
Abstract
Organic substitution has strong potential for carbon sequestration and sink enhancement.However,the cooling effect of or-ganic substitution is significantly influenced by soil type and climatic conditions.Despite this,there remains a lack of targeted studies on how high substitution ratios can account for crop yield and emission reduction in typical soil areas.In this study,Shajiang black soil was used as the research object.Treatments included no fertilizer(CK),pure fertilizer(OPT),and varying levels of organic(chicken manure)substitution(1/4M,1/2M,3/4M and M).A two-year soil enrichment experiment was conducted,and greenhouse gas(GHGs)emissions were monitored during two fertilization periods in the wheat season of the second year.The results showed that soil organic carbon increased significantly with an increase in the organic replacement ratio,but the annual carbon sequestration effi-ciency(SOCSR)declined.The N2O emissions initially increased and then decreased with an increase in the substitution amount.In particular,the 1/4M treatment produced the highest N2O emissions,followed by the OPT and 1/2M treatments,whereas the CK and M treatments showed the lowest emissions.Among the cumulative emissions of CH4,except for the 1/4M treatment which was the lowest and the OPT treatment which was the highest,the differences in the other treatments were not significant,and the overall level was not high.By combining the N2O,CH4,and soil carbon sequestration efficiency(SOCSR),the net warming potential(Net-GWP)of farmland under high organic substitution(M)treatment was-5 097.6 kg(CO2-eq)·hm-2,which was significantly lower than that of other treatments.This was followed by 3/4M and 1/2M treatments,with Net-GWP values of-3 523.1 and-2 541.7 kg(CO2-eq)·hm-2 respectively.In contrast,the Net-GWP of OPT and 1/4M treatment was relatively high,at-879.1 and-501.1 kg(CO2-eq)·hm-2,which was significantly higher than that of other treatments(except CK).The Net-GWP initially increased and then decreased with organic substitution from zero to full substitution.In addition,N2O emissions and CH4 absorption in the wheat base fertilizer period were significantly higher than those in the topdressing period.N2O emissions during the base fertilizer period accounted for 58.1％-66.7％of the total emissions,and CH4 absorption in the base fertilizer period accounted for 55.3％-60.0％of the total absorp-tion.Among the different treatments,the wheat yield of the 1/2M treatment was the highest,followed by that of the 1/4M treatment,3/4M,and OPT treatments,whereas the total substitution(M)and CK treatments had the lowest yield.This study concludes that the short-term application of 50％chicken manure substitution not only maintains wheat yield in Shajiang black soil,but also enhances carbon sequestration and reduces emissions.Therefore,it is the optimal replacement ratio for achieving comprehensive economic and ecological benefits in Shajiang black soil wheat fields.关键词
有机替代/温室气体/土壤固碳效率/砂姜黑土/田间增温潜势/产量效益Key words
organic substitution/greenhouse gases/soil carbon sequestration efficiency/Shajiang black soil/field global warming potential/yield benefits分类
农业科技引用本文复制引用
吕金岭,李太魁,骆晓声,乔璐,纪朝凤,肖强,张辉..有机替代对砂姜黑土小麦季温室气体排放及净增温潜势的影响[J].中国生态农业学报（中英文）,2025,33(7):1289-1300,12.基金项目
河南省重点研发专项(241111320300)、河南省重大科技专项(221100110700)、河南省科技攻关项目(232102110016)、河南省自然科学基金面上项目(242300421366)和河南省农业科学院杰出青年基金项目(2023JQ04)资助 This study was supported by the Key Research and Development Program of Henan Province(241111320300),Henan Province Major Science and Technology Project(221100110700),Science and Technology Innovation Project of Henan Province(232102110016),Henan Provincial Natural Sci-ence Foundation Project(242300421366),and the Outstanding Youth Fund Project of Henan Academy of Agricultural Sciences(2023JQ04). （241111320300）
