中国烟草科学2025，Vol.46Issue(6)：23-30,8.DOI:10.13496/j.issn.1007-5119.2025.06.004
不同连作年限烟田的土壤线虫群落结构特征
Characteristics of Soil Nematode Community Structure in Tobacco Fields with Different Continuous Cropping Years
摘要
Abstract
To clarify the relationship between tobacco continuous cropping duration and soil nematode community characteristics,35 tobacco fields were sampled in the western Hubei tobacco-growing region,which were categorized into five continuous cropping duration groups:2 years,5-10 years,11-20 years,21-30 years,and>30 years.High-throughput sequencing was employed to investigate the effects of different continuous cropping durations on soil nematode community structure and trophic groups.The results showed that the increase in tobacco field continuous cropping duration enhanced soil nematode diversity and altered the nematode community structure.Among the 36 identified nematode genera,11 showed significant differences among different continuous cropping durations.Specifically,the relative abundance of Caenorhabditis increased after 10 years of continuous cropping,while the opposite trend was observed for Aphelenchus,Mononchus and Panagrolaimus.With the extension of continuous cropping duration,the nematode maturity index first increased and then decreased;the relative abundance of bacterivorous nematodes(bacterivores)first decreased and then increased,while that of fungivorous nematodes(fungivores)significantly declined.Both the enrichment index and structural index were higher under long-term continuous cropping(over 10 years).Further nematode faunal analysis indicated that the nematode communities in short-term continuous cropping(under 10 years)and long-term continuous cropping(over 10 years)were significantly separated.Comprehensive analysis revealed that long-term continuous cropping(over 10 years)increases soil nematode community diversity,alters the structure of trophic groups,enriches soil nutrients,and reduces environmental disturbance intensity.Additionally,this study elucidates the dynamic process of the soil microhabitat from initial environmental stress to long-term stability.关键词
烟草/连作年限/线虫群落/营养类群Key words
tobacco/continuous cropping years/nematode communities/trophic groups分类
农业科技引用本文复制引用
LI Yunxia,REN Xiaohong,GUO Li,SHU Zhaohe,HU Gongjun,LI Xiaogang,DONG Yuanhua..不同连作年限烟田的土壤线虫群落结构特征[J].中国烟草科学,2025,46(6):23-30,8.基金项目
湖北省烟草公司科技项目(027Y2022-001) （027Y2022-001）
