土壤与作物2026，Vol.15Issue(2)：223-234,12.DOI:10.11689/sc.2025070401
有机物料深混还田对白浆土微生物群落特征的影响
Effects of deep incorporation of organic materials on microbial community characteristics in albic soil
摘要
Abstract
In order to investigate the effects of deep incorporation of organic materials on microbial community characteristics in the plow layer and subsoil of albic soil,a two-year field experiment was conducted.The experiment included the following treat-ments:deep tillage at 35 cm(DT,no organic material),deep tillage at 35 cm plus straw(DTS),deep tillage at 35 cm plus manure(DTM),deep tillage at 35 cm plus straw and manure(DTSM),with conventional shallow tillage at 15 cm(CT,no organic materials)as the control.The results show that compared to the CT treatment,DTM and DTSM significantly increase the content of AK(avail-able potassium)and pH in the plow layer,while DTSM significantly increases the content of AN(available nitrogen)(P<0.05).In the subsoil,the contents of SOC(soil organic carbon),TN(total nitrogen),AN,and AK are significantly higher in the DT,DTS,DTM,and DTSM treatments compared to CT(P<0.05).Deep incorporation of organic materials significantly influences soil micro-bial community characteristics in both the plow layer and subsoil.The dominant bacterial phyla are Proteobacteria,Actinobacteriota,and Acidobacteriota,while the fungal communities are primarily dominated by Ascomycota and Mortierellomycota.DTSM treat-ment significantly increases the Chao1 and Shannon indices in the plow layer and the Shannon index in the subsoil(P<0.05).Princi-pal coordinate analysis(PCoA)indicates differential effects of the treatments on soil microbial communities.A pronounced shift in bacterial community characteristics is observed in DTSM and DTM treatments,which clearly separate from the clusters of the CT and DT treatments.In contrast,CT and DT treatments maintain highly similar bacterial and fungi community profiles.Redundancy analysis indicates that changes in microbial community in the plow layer are significantly positively correlated with AN,AK,and pH(P<0.05),while in the subsoil,they are significantly positively correlated with SOC and TN(P<0.05).Random forest model analysis showed that pH value and available potassium(AK)were the key factors affecting bacterial and fungal communities,with contribu-tion degrees of 0.25 and 0.28,respectively.In conclusion,the application of organic fertilizer alone or combined with straw(DTSM/DTM)represents the optimal strategy for enhancing nutrient content and microbial community characteristics in albic soil.关键词
白浆土/有机物料/土壤微生物群落/土壤养分Key words
albic soil/organic materials/soil microbial community/soil nutrient分类
农业科技引用本文复制引用
苏粤,严君,韩晓增,陈旭,邹文秀,陆欣春,杨舒纯,高瑞敏..有机物料深混还田对白浆土微生物群落特征的影响[J].土壤与作物,2026,15(2):223-234,12.基金项目
国家重点研发计划项目(2022YFD1500802) （2022YFD1500802）
中国科学院战略性先导科技专项A类(XDA28070000). （XDA28070000）
