沈阳大学学报（自然科学版）2025，Vol.37Issue(2)：107-114,8.
Meta分析保护性耕作对东北地区农田土壤有机碳含量和温室气体排放的影响
Meta-Analysis of Effects of Conservation Tillage on Soil Organic Carbon Content and Greenhouse Gas Emissions in Cropland of Northeast China
摘要
Abstract
An integrated analysis was conducted using 635 pairs of observations from 93 relevant studies to comprehensively evaluate the effects of conservation tillage practices(no-tillage,reduced tillage,and straw return)on soil organic carbon content(SOC),greenhouse gas emissions(carbon dioxide(CO2),methane(CH4),nitrous oxide(N2O)),and crop yield in farmland soils of Northeast China,as well as their regulatory factors.For the Northeast region as a whole,compared to conventional tillage,conservation tillage significantly increased soil SOC content,soil organic matter content(SOM),total nitrogen content(TN),nitrate nitrogen content(NO3--N),microbial biomass carbon(MBC),microbial biomass nitrogen(MBN),and crop yield,with increases of 15.1％,9.7％,1.1％,1.1％,56.6％,31.9％and 3.8％,respectively.In contrast,conservation tillage significantly reduced soil N2O emission flux by 1.3％,while its effects on soil CH4 and CO2 emission fluxes were negligible.Significant differences were observed in the effects of experimental duration,straw return practices,and annual average rainfall on SOC content and crop yield.Under straw return,the carbon sequestration potential and yield-increasing effects of no-till practices were enhanced,while reduced tillage had little impact on soil carbon sequestration potential and yield improvement.As the experimental duration increased,the increase in SOC content showed an upward trend.Similarly,as the annual average rainfall increased,the increase in crop yield also showed an upward trend.The above results indicate that the implementation of no-till combined with straw return as conservation tillage practices in farmland soils of Northeast China is beneficial for soil SOC sequestration and the reduction of N2O emissions,making it a suitable conservation tillage strategy for achieving carbon sequestration and emission reduction in the black soil region of Northeast China.关键词
东北地区/免耕/秸秆还田/Meta分析/有机碳/温室气体排放Key words
Northeast China/no-tillage/straw return/Meta-analysis/organic carbon/greenhouse gas emissions分类
农业科学引用本文复制引用
尹明远,高思宇,张雪雁,李雨欣,于晓雨,程全国..Meta分析保护性耕作对东北地区农田土壤有机碳含量和温室气体排放的影响[J].沈阳大学学报（自然科学版）,2025,37(2):107-114,8.基金项目
国家自然科学基金资助项目(42307433) （42307433）
辽宁省教育厅基本科研项目(JYTMS20231166) （JYTMS20231166）
省级大学生创新创业训练计划项目(S202311035082). （S202311035082）
