梁泽丽, 秦佳琪, 何 江, 刘含颖, 王 婷, 覃 林. 南亚热带典型乡土阔叶人工林与天然次生林土壤细菌群落结构和多样性的相异性[J]. 土壤通报, 2024, 55(4): 1060 − 1070. DOI: 10.19336/j.cnki.trtb.2023110703
引用本文: 梁泽丽, 秦佳琪, 何 江, 刘含颖, 王 婷, 覃 林. 南亚热带典型乡土阔叶人工林与天然次生林土壤细菌群落结构和多样性的相异性[J]. 土壤通报, 2024, 55(4): 1060 − 1070. DOI: 10.19336/j.cnki.trtb.2023110703
LIANG Ze-li, QIN Jia-qi, HE Jiang, LIU Han-ying, WANG Ting, QIN Lin. Dissimilarity of Soil Bacterial Community Structure and Diversity between Typical Native Broadleaf Plantation and Primary Secondary Forest in South Subtropical China[J]. Chinese Journal of Soil Science, 2024, 55(4): 1060 − 1070. DOI: 10.19336/j.cnki.trtb.2023110703
Citation: LIANG Ze-li, QIN Jia-qi, HE Jiang, LIU Han-ying, WANG Ting, QIN Lin. Dissimilarity of Soil Bacterial Community Structure and Diversity between Typical Native Broadleaf Plantation and Primary Secondary Forest in South Subtropical China[J]. Chinese Journal of Soil Science, 2024, 55(4): 1060 − 1070. DOI: 10.19336/j.cnki.trtb.2023110703

南亚热带典型乡土阔叶人工林与天然次生林土壤细菌群落结构和多样性的相异性

Dissimilarity of Soil Bacterial Community Structure and Diversity between Typical Native Broadleaf Plantation and Primary Secondary Forest in South Subtropical China

  • 摘要:
    目的 探讨乡土阔叶人工林与天然次生林土壤细菌群落特征的差异及其调控的土壤环境因子,为优化和改造现有人工林向近自然林转换的经营策略提供土壤微生物学方面的科学依据。
    方法 以红锥(Castanopsis hicklii, CHP)、火力楠(Michelia macclurei, MLP)和米老排(Mytilaria laosensis, PSF)等3个南亚热带典型乡土阔叶人工林及天然次生林(Primary secondary forest, PSF)为对象,对各林分0 ~ 20、20 ~ 40和40 ~ 60 cm等3个土壤层次的样品进行高通量测序和土壤理化性质测定,探讨了土壤细菌群落结构、Alpha多样性、分子生态网络结构对不同林分的响应。
    结果 ①天然次生林和乡土阔叶人工林的土壤细菌群落结构差异显著,且天然次生林比乡土阔叶人工林拥有较高的土壤细菌Alpha多样性和网络结构复杂性。②土壤pH、含水量、NO3-N和速效磷是导致乡土阔叶人工林与天然次生林土壤细菌群落结构、Alpha多样性和网络结构复杂性存在差异的主要影响因子。
    结论 基于土壤细菌群落结构和多样性的视角,在保护好现有天然林、天然次生林的同时,提倡营造模仿天然次生林的多阔叶树种混交林,可以提升土壤细菌多样性和网络结构复杂性,从而促使该地区人工林土壤生态功能得到充分和可持续发展。

     

    Abstract:
    Objective Differences in soil bacterial community characteristics between native broadleaf plantation and primary secondary forest and their regulatory soil environmental factors were studied in order to provide a scientific basis of soil microbiology for the management strategy to optimize and transform existing plantations into near-natural forests.
    Method Three native broadleaf plantations (Castanopsis hicklii, Michelia macclurei and Mytilaria laosensis) and primary secondary forest in the south subtropical China were selected as the objects. High-throughput sequencing and soil physicochemical properties were performed on soil samples from 0 - 20 cm, 20 - 40 cm and 40 - 60 cm of each stand, and the responses of soil bacterial community structure, Alpha diversity and molecular ecological network structure to different stands were investigated.
    Result ① Soil bacterial community structure was significantly different between primary secondary forest and native broadleaf plantation, and primary secondary forest had higher soil bacterial Alpha diversity and network structure complexity than native broadleaf plantation. ② The main factors affecting soil bacterial community structure, Alpha diversity and network structure complexity between native broadleaf plantation and primary secondary forest were soil pH, water content, NO3-N and available phosphorus.
    Conclusion From the perspective of soil bacterial community structure and diversity, While protecting existing primary forests and primary secondary forests, advocating the construction of mixed plantations with multiple broadleaf species imitating primary secondary forest can enhance soil bacterial diversity and network structure complexity, which will promote the sustainable development of the ecological functions of the artificial forests in the region.

     

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