| 引用本文： |
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付玉萱,卢永鹏,周博艺,周晓果,王磊,李晓琼.不同植食性生物次序取食对土壤线虫群落的影响[J].广西科学,2026,33(3):667-675. [点击复制]
- FU Yuxuan,LU Yongpeng,ZHOU Boyi,ZHOU Xiaoguo,WANG Lei,LI Xiaoqiong.Effects of Sequential Feeding by Different Herbivorous Organisms on Soil Nematode Communities[J].Guangxi Sciences,2026,33(3):667-675. [点击复制]
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| 摘要: |
| 土壤线虫作为根际生态系统的重要指示生物，其数量和群落结构的变化能直接反映植物—土壤互作状态。本研究以乌桕(Triadica sebifera)的地上食叶昆虫癞皮夜蛾(Gadirtha fusca)和地下寄生线虫南方根结线虫(Meloidogyne incongnita)为研究对象，设立4种不同生物互作处理，探究地上—地下植食性生物次序取食对植物根际土壤线虫群落的影响。结果表明：癞皮夜蛾、南方根结线虫的次序取食显著改变了土壤线虫的类群结构及优势类群。地上—地下次序取食处理(ABseq)的土壤线虫以c-p4类群为主，其相对多度、成熟度指数(MI)和功能群多样性指数(TD)显著高于无取食处理(CK)；地上—地下同时取食处理(ABsim)、单南方根结线虫取食处理(BG)的食真菌线虫与食细菌线虫比例(F/B)均显著低于CK，线虫通路指数(NCR)则均显著高于CK。此外，ABseq的N、物种丰富度(S)、Margalef丰富度指数(Ma)、MI、F/B、TD均显著高于BG，而Simpson优势度指数(λ)、NCR显著低于BG。研究结果可为植物—土壤互作关系研究积累本底资料，为减轻南方根结线虫侵染提供新思路。 |
| 关键词: 地上-地下互作 土壤线虫 植食性生物 次序取食 南方根结线虫 |
| DOI：10.13656/j.cnki.gxkx.20260708.019 |
| 投稿时间：2025-12-09修订日期：2026-01-07 |
| 基金项目:国家自然科学基金项目(32360391)，广西自然科学基金项目(2024GXNSFAA010457)，广西科技基地和人才专项(桂科AD25069066)，广西农业科学院科技发展基金项目(桂农科2026YT170,桂农科2021YT119)，大学生创新创业训练计划项目(S202510593484)资助。 |
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| Effects of Sequential Feeding by Different Herbivorous Organisms on Soil Nematode Communities |
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FU Yuxuan1, LU Yongpeng1, ZHOU Boyi1, ZHOU Xiaoguo2, WANG Lei1, LI Xiaoqiong1
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| (1.Guangxi Key Laboratory of Forest Ecology and Conservation, School of Forestry, Guangxi University, Nanning, Guangxi, 530004, China;2.Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China) |
| Abstract: |
| Soil nematodes are key bioindicators of rhizosphere ecosystems,and changes in the abundance and community structure of soil nematodes provide direct insights into plant—soil interactions.In this study,the aboveground herbivorous insect Gadirtha fusca and the belowground parasitic nematode Meloidogyne incongnita on Triadica sebifera were used as research objects.Four different biological interaction treatments were set up to explore the effects of sequential feeding by aboveground and belowground herbivorous organisms on the soil nematode community in the plant rhizosphere.The results showed that the sequential feeding of the aboveground and belowground herbivores significantly changed the community structure and dominant species of soil nematodes.The soil nematodes in the treatment of sequential feeding by G.fusca followed by M.incognita (ABseq) were mainly of the c-p4 group,and their abundance (N),maturity index (MI),and trophic diversity index (TD) were significantly higher than those in the no-feeding treatment (CK).The soil nematodes in the treatments of simultaneous feeding by both herbivores (ABsim) and feeding by M.incognita alone (BG) had significantly lower fungivore to bacterivore (F/B) ratios and significantly higher nematode channel ratios (NCR) than CK.In addition,the ABseq treatment had significantly higher N,species richness (S),Margalef richness index (Ma),MI,F/B ratio, and TD but significantly lower Simpson's dominance index (λ) and NCR than BG.The research results can accumulate background data for the study of plant—soil interaction relationships and provide new ideas for reducing the infection of M.incongnita. |
| Key words: aboveground-belowground interactions soil nematodes herbivorous organisms sequential feeding Meloidogyne incongnita |
