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中国农学通报

中国农学通报 ›› 2024, Vol. 40 ›› Issue (33): 93-101.doi: 10.11924/j.issn.1000-6850.casb2024-0347

• 资源·环境·生态·土壤 • 上一篇    下一篇

气生小球藻附着对3种凋落叶分解过程的影响

蒋钰玲1(), 钱书蕊1, 章晨露1, 王钰莹1, 王鹏1, 陶建平1,2()   

  1. 1 三峡库区生态环境教育部重点实验室/三峡库区植物生态与资源重庆市高校重点实验室/西南大学生命科学学院，重庆 400715
    2 重庆金佛山喀斯特生态系统国家野外科学观测研究站，西南大学，重庆 400715
  • 收稿日期:2024-05-20 修回日期:2024-09-06 出版日期:2024-11-25 发布日期:2024-11-23
  • 通讯作者:
    陶建平，男，1971年出生，四川南部人，教授，博士，博士生导师，研究方向：森林生态系统功能及稳定性、退化生态系统恢复重建、陆生植物物种多样性。通信地址：400715 重庆市北碚区天生路2号，西南大学生命科学学院29教219，Tel：0086-23-68252246，E-mail：。
  • 作者简介:

    蒋钰玲，女，2002年出生，江苏无锡人，本科，研究方向：森林生态学。通信地址：400715 重庆市北碚区天生路2号，E-mail：。

  • 基金资助:
    国家级大学生创新创业训练计划资助项目“气生藻类通过凋落叶分解影响土壤养分循环”(202310635095)

The Influences of Aerial Chlorella Attachment on Decomposition of Three Kinds of Apoptotic Leaves

JIANG Yuling1(), QIAN Shurui1, ZHANG Chenlu1, WANG Yuying1, WANG Peng1, TAO Jianping1,2()   

  1. 1 Key Laboratory of Eco-environment in Three Gorges Reservoir Region (Ministry of Education)/Chongqing Key Laboratory of Plant Ecology and Resources in Three Gorges Reservoir Region/ School of Life Sciences, Southwest University, Chongqing 400715
    2 Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station, Southwest University, Chongqing 400715
  • Received:2024-05-20 Revised:2024-09-06 Published:2024-11-25 Online:2024-11-23

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摘要：

本研究探究了气生藻类在森林生态系统凋落叶分解过程中所起的作用及内在机理。以雷公鹅耳枥(Carpinus viminea)、小叶青冈(Quercus myrsinifolia)和光亮山矾(Symplocos lucida)凋落叶为研究对象，分别接种2种浓度的气生小球藻进行叶片分解控制试验，探究气生小球藻附着对凋落叶分解过程的影响。结果表明：（1）不同浓度附生小球藻添加对凋落叶质量损失无显著影响，但不同树种凋落叶的质量损失有显著差异，两者间无交互作用；（2）不同树种凋落叶的分解速率对藻浓度处理的反应不同；（3）凋落叶自身性状对其质量损失影响强烈；（4）附生小球藻添加对土壤分解者细菌和真菌丰富度、多样性无显著影响，但不同树种凋落叶对细菌和真菌多样性的影响显著。研究结果表明，微生物分解者的丰富度和多样性主要受控于凋落叶自身性状，而气生藻类附着对分解体系中微生物无显著影响，因而，局域环境中凋落叶的分解主要受到叶片自身性状的影响，气生藻类附着对凋落叶的分解过程无显著影响。

关键词: 附生小球藻, 凋落叶分解, 室内试验, 叶片性状, 土壤微生物, 气生藻类, 微生物丰富度, 微生物多样性

Abstract:

To explore the role and internal mechanisms of aerial algae in the decomposition process of forest ecosystem and the effect of aerial Chlorella attachment on the decomposition process of leaf litters, we conducted leaf decomposition control experiments by inoculating leaf litters of Carpinus viminea, Quercus myrsinifolia and Symplocos lucida with two concentrations of aerial Chlorella. The results showed that: (1) the addition of Chlorella at different concentrations had no significant effect on the mass loss of leaf litters. However, there were significant differences in mass loss among the leaf litters of different tree species, with no interaction between them. (2) The decomposition rates of leaf litters from different tree species responded differently to the algal concentration treatment. (3) The intrinsic attributes of the leaf litters strongly influenced mass loss. (4) The addition of attached Chlorella had no significant effect on the abundance and diversity of bacteria and fungi in the soil. However, the type of leaf litters significantly affected the abundance and diversity of bacteria and fungi in the soil. The study indicated that the abundance and diversity of microbial decomposers were primarily controlled by the attributes of the leaf litters themselves, and the attachment of aerial algae had no significant impact on the microorganisms in the decomposition system. Therefore, the decomposition of leaf litters in the local environment is mainly influenced by the leaf's own attributes, and the impact of aerial algae attachment on the decomposition process of leaf litters was not significant.

Key words: epiphytic Chlorella, litter decomposition, laboratory experiment, leaf traits, soil microorganisms, aerial algae, microbial abundance, microbial diversity