土壤学报2025，Vol.62Issue(3)：801-810,10.DOI:10.11766/trxb202312260540
花生/玉米间作增加花生土壤微生物活性促进土壤有机碳固持
Peanut/maize Intercropping Promotes Peanut Soil Organic Carbon Sequestration by Increasing Soil Microbial Activity
摘要
Abstract
[Objective]Intercropping is an effective strategy for increasing soil carbon(C)sequestration by utilizing farmland biodiversity.The aim of this study was to investigate the contribution of peanut rhizosphere microbes adjacent to maize to soil organic C(SOC)sequestration in an intercropping system.[Method]Based on the long-term peanut/maize intercropping experimental platform of Jiangsu Academy of Agricultural Sciences,two rows of peanuts and two rows of maize were planted in strips.Ecological test plate(BIOLOG)and gas chromatography were used to analyze the C metabolic ability of maize to adjacent peanuts rhizosphere microbes and the accumulation of microbial necromass C.[Result]The results showed that compared with peanuts planted far away from maize,peanuts planted adjacent to the maize decreased rhizosphere polyphenol oxidase activity by 19.0%,soil respiration rate by 18.2%,average color change rate(AWCD)by 22%,rhizosphere microbial metabolism of phenolic acids and amino acids by 149.4%and 16.1%,respectively.The total amino sugar(TAS)content of peanut rhizosphere soil adjacent to maize was 6.45%higher than that of peanut planted far away from maize,and the content of bacterial necromass C and fungal necromass C was increased,which eventually led to a 12.9%increase in SOC.[Conclusion]Our study suggests that adjacent maize does not change the soil respiration rate of the peanut rhizosphere,but reduces the activity of SOC decompositiong enzymes in the peanut rhizosphere and enhances the ability of rhizosphere microbes to metabolize a wider range of organic carbon components,thereby increasing SOC by accumulating bacterial and fungal necromass C.关键词
花生/玉米间作/土壤呼吸速率/BIOLOG/氨基糖/微生物残体碳Key words
Peanut/maize intercropping/Soil respiration rate/BIOLOG/Amino sugar/Microbial necromass C分类
农业科技引用本文复制引用
李世文,卢居勐,黄耿,沈一,孙波,张嵚,陈晏..花生/玉米间作增加花生土壤微生物活性促进土壤有机碳固持[J].土壤学报,2025,62(3):801-810,10.基金项目
国家重点研发计划项目(2022YFD1900601)、井冈山农高区省级科技专项"揭榜挂帅"项目(20222-051261)和国家自然科学基金面上项目(41977098)资助 Supported by the National Key R&D Program(No.2022YFD1900601),the Jinggang Shan Agricultural Hitech District Project(No.20222-051261),and the National Natural Science Foundation of China(No.41977098) （2022YFD1900601）
