| 引用本文: | 李继琼, 雷艳婷, 江星玉, 李 瑞, 蓝家程.喀斯特高原峡谷石漠化植被恢复对土壤微生物群落结构和有机碳的影响[J].广西植物,2025,45(6):1019-1033.[点击复制] |
| LI Jiqiong, LEI Yanting, JIANG Xingyu, LI Rui, LAN Jiacheng.Effects of rocky desertification vegetation restoration on soil microbial community structure and organic carbon in karst plateau canyons[J].Guihaia,2025,45(6):1019-1033.[点击复制] |
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| 喀斯特高原峡谷石漠化植被恢复对土壤微生物群落结构和有机碳的影响 |
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李继琼1, 雷艳婷1, 江星玉1, 李 瑞1, 蓝家程1,2*
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1. 贵州师范大学 地理与环境科学学院, 贵阳 550025;2. 贵州师范大学喀斯特研究院/
国家喀斯特石漠化防治工程技术研究中心, 贵阳 550025
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| 摘要: |
| 为探究喀斯特高原峡谷石漠化植被恢复对土壤微生物群落结构、土壤有机碳组分变化的影响以及有机碳与微生物的关系,该文以贵州喀斯特高原峡谷耕地(对照)和典型植被恢复(花椒林和天然次生林)的土壤(0～20 cm)为研究对象,测定土壤有机碳及组分含量、微生物群落组成和多样性,研究了植被恢复后土壤有机碳及组分含量和微生物多样性及群落组成的变化特征,并分析有机碳组分与微生物类群的关系。结果表明:(1)植被恢复显著增加了土壤有机碳及组分含量,并且0～10 cm土层相对10～20 cm土层增加更显著(P<0.05)。(2)植被恢复明显改变了土壤微生物β多样性和物种相对丰度,但α多样性并未发生显著变化。(3)所有样品中土壤的主要优势细菌门为未分类细菌(unclassified_k__norank_d__Bacteria)、放线菌门(Actinobacteriota)、变形菌门(Proteobacteria)和酸杆菌门(Acidobacteriota),主要优势真菌为子囊菌门(Ascomycota)、未分类真菌(unclassified_k__Fungi)、担子菌门(Basidiomycota)和被孢霉门(Mortierellomycota)。(4)与土壤有机碳及组分密切相关的细菌主要为放线菌门中的浅野式菌属、norank_f__67-14、土壤红杆菌属、norank_f__Ilumatobacteraceae、链霉菌属以及子囊菌门中的unclassified_p__Ascomycota、Setophaeosphaeria、unclassified_o__Helotiales、unclassified_o__Pleosporales、枝孢菌属、棘壳孢属、unclassified_o__Sordariales、绿僵菌属、耳孢菌属、外瓶霉属。该研究结果表明,喀斯特石漠化治理植被恢复可以促进土壤有机碳的积累,改变微生物群落,其中放线菌门和子囊菌门是影响有机碳及组分变化的关键物种。 |
| 关键词: 喀斯特土壤, 喀斯特石漠化, 植被恢复, 土壤有机碳, 土壤微生物 |
| DOI：10.11931/guihaia.gxzw202402005 |
| 分类号:Q948 |
| 文章编号:1000-3142(2025)06-1019-15 |
| 基金项目:国家自然科学基金(42177446,41601584); 贵州师范大学2022年大学生创新创业训练项目(s202210663026); 贵州师范大学地理与环境科学学院‘黄大年地理实验班'项目(2023004); 贵州省科学技术基金(黔科合 [2017]1417); 贵州师范大学项目(黔师新苗 [2022]28)。 |
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| Effects of rocky desertification vegetation restoration on soil microbial community structure and organic carbon in karst plateau canyons |
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LI Jiqiong1, LEI Yanting1, JIANG Xingyu1, LI Rui1, LAN Jiacheng1,2*
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1. School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China;2. Karst Research Institute of
Guizhou Normal University/National Karst Rocky Desertification Prevention and Control Engineering
Technology Research Center, Guiyang 550025, China
1. School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China; 2. Karst Research Institute of
Guizhou Normal University/National Karst Rocky Desertification Prevention and Control Engineering
Technology Research Center, Guiyang 550025, China
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| Abstract: |
| To explore the effects of vegetation restoration on the structure of soil microbial communities, the variation in soil organic carbon components, and the interaction between microbes and organic carbon in karst plateau canyons, soils were collected from 0 to 20 cm depth in cropland(control)and under typical vegetation restoration(Zanthoxylum bungeanum and natural secondary forests)in Guizhou karst plateau canyons. The contents of soil organic carbon and its components and the composition and diversity of microbial communities were determined. Changes in soil organic carbon and its components, microbial diversity, and community composition after vegetation restoration were investigated. The relationships between soil organic carbon components and microbial taxa were analyzed. The results were as follows:(1)Vegetation restoration significantly increased the contents of soil organic carbon and its components, particularly in the 0-10 cm soil layer compared with the 10-20 cm layer(P<0.05).(2)Vegetation restoration significantly altered β diversity and relative abundance of soil microbial species, although no significant change was observed in α diversity.(3)The dominant bacterial phyla in all samples were unclassified_k__norank_d__Bacteria, Actinobacteriota, Proteobacteria, and Acidobacteriota, and the main fungal phyla were Ascomycota, unclassified_k__Fungi, Basidiomycota, and Mortierellomycota.(4)Bacteria closely related to soil organic carbon and its components mainly included Asanoa, norank_f__67-14, Solirubrobacter, norank_f__Ilumatobacteraceae, and Streptomyces from Actinobacteriota and unclassified_p__Ascomycota, Setophaeosphaeria, unclassified_o__Helotiales, unclassified_o__Pleosporales, Cladosporium, Setophoma, unclassified_o__Sordariales, Metarhizium, Codinaea, and Exophiala from Ascomycota. The results show that vegetation restoration in karst rocky desertification control can promote the accumulation of soil organic carbon and change the microbial community, among which, Actinobacteriota and Ascomycota are key species affecting changes in soil organic carbon and its components. |
| Key words: karst soil, karst rocky desertification, vegetation restoration, soil organic carbon, soil microorganism |
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