整合分析施用食用菌菌渣对土壤有机碳及其组分的影响OA

To investigate the effects of applying edible mushroom residues on soil organic carbon(SOC)and its components,46 literatures related to the application of edible mushroom residues around the world were searched,and the effects of edible mushroom residues application on SOC and its components were quantified by Meta-analysis.The findings demonstrated that mushroom residue application significantly increased SOC and its components content.Specifically,SOC increased by 32.2％,while dissolved organic carbon(DOC),microbial biomass carbon(MBC),particulate organic carbon(POC)and permanganate oxidative organic carbon(POXC)increased by 113.4％,46.8％ and 33.9％,respectively.MBC had the most notable effect,which indicated that soil microorganisms were pivotal in the decomposition and transformation of SOC.The SOC level was positively correlated with DOC,MBC and POXC,but showed a negative correlation with MBC.Compared with no fertilizing,the SOC in the area with average temperature≤15℃and average annual precipitation>1 000 mm increased significantly.Among different land use types,sandy soils had the highest carbon sequestration potential.Additionally,SOC and its components showed substantial increases in 0 to 20 cm soil layer.Direct application of edible mushroom residues resulted in greater increases in SOC and its components compared to indirect application.However,the increase range of SOC and its components decreased over time with application time.Overall,soil with sufficient nutrient supply had a low SOC retention potential,and the increase of SOC and its components decreases with the higher nutrient content of edible mushroom residues.It indicated that the higher initial nutrient content of soil and edible mushroom residues did not mean a higher carbon sequestration effect,which might also depend on other influencing factors.