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应用生态学报 ›› 2022, Vol. 33 ›› Issue (4): 1091-1098.doi: 10.13287/j.1001-9332.202204.030

• 研究论文 • 上一篇    下一篇

毛竹扩张对常绿阔叶林土壤微生物群落的影响

马鑫茹1,2, 郑旭理3, 郑春颖3, 胡玉婷1, 秦华1,2, 陈俊辉1,2, 徐秋芳1,2, 梁辰飞1,2*   

  1. 1浙江农林大学环境与资源学院, 杭州 311300;
    2浙江省森林生态系统碳循环与固碳减排重点实验室, 杭州 311300;
    3浙江省湖州市安吉县灵峰寺林场, 浙江湖州 313300
  • 收稿日期:2021-04-14 接受日期:2021-11-30 出版日期:2022-04-15 发布日期:2022-05-07
  • 通讯作者: * E-mail: Liangchenfei@zafu.edu.cn
  • 作者简介:马鑫茹, 女, 1996年生, 硕士研究生。主要从事土壤生物与生物化学研究。E-mail: mxr2020123@163.com
  • 基金资助:
    浙江省自然科学基金项目(LY20C160003,LZ22C160001)和浙江农林大学科研发展基金项目(W20180061)资助。

Effects of moso bamboo (Phyllostachys edulis) expansion on soil microbial community in evergreen broad-leaved forest

MA Xin-ru1,2, ZHENG Xu-li3, ZHENG Chun-ying3, HU Yu-ting1, QIN Hua1,2, CHEN Jun-hui1,2, XU Qiu-fang1,2, LIANG Chen-fei1,2*   

  1. 1School of Environment and Resource Sciences, Zhejiang A&F University, Hangzhou 311300, China;
    2Zhejiang Provincal Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Hangzhou 311300, China;
    3Lingfeng Temple Forest Farm, Huzhou 313300, Zhejiang, China
  • Received:2021-04-14 Accepted:2021-11-30 Online:2022-04-15 Published:2022-05-07

摘要: 毛竹具有独特的生理生态学特征,会不断地向邻近的生态系统扩张。这一现象会造成生态系统退化、土壤理化性质和微生物群落结构改变等问题,引起了人们的高度关注。然而,目前关于毛竹扩张对微生物群落结构的影响研究甚少。以安吉灵峰寺林场的长期定位试验为平台,在4条毛竹扩张样带上依次设置常绿阔叶林(BLF)、竹-阔混交林(MEF)和毛竹林(PEF)样地,测定不同林型的土壤理化性质以及微生物群落特征。结果表明: 随着毛竹的扩张,土壤pH值显著上升,毛竹林土壤pH值分别比竹-阔混交林和常绿阔叶林高0.37和0.32,而有机碳、铵态氮、硝态氮含量显著降低;除丛枝菌根真菌外,其他主要微生物类群都有下降的趋势,且微生物多样性和丰富度显著降低。毛竹扩张对土壤碳输入及养分的改变是影响地下微生物群落生物量及结构的重要因素,其中土壤有机碳、铵态氮含量是影响土壤微生物群落变化的主要因子。

关键词: 毛竹扩张, 磷脂脂肪酸, 土壤微生物群落, 微生物多样性

Abstract: The special eco-physiological characteristics of moso bamboo (Phyllostachys edulis) facilitate their fast invasion in nature ecosystems. The widespread expansion of moso bamboo causes degradation of adjacent forest ecosystem and change of landscape, as well as soil properties and microbial community composition. However, how moso bamboo expansion affects soil microbial composition is far from fully understood. Herein, we selected four moso bamboo expansion transects with three forest types at the Anji Lingfeng temple forest farm, Zhejiang Province, including evergreen broadleaved forest (BLF), mixed P. edulis and broadleaved forest (MEF) and P. edulis forest (PEF). We examined the effects of moso bamboo expansion on soil properties and soil microbial phospholipid fatty acids (PLFAs). Our results showed that soil pH was higher in moso bamboo forest than in MEF and BLF by 0.37 and 0.32 unit. In contrast, soil organic carbon, ammonium, and nitrate contents significantly decreased. Biomass of soil microbial groups displayed a decreasing trend except arbuscular mycorrhizal fungi, and the microbial richness index (SR) and diversity index (H) decreased significantly. In summary, moso bamboo expansion affected soil nutrient and carbon inputs, which was an important factor affecting soil microbial community structure. Results of redundancy analysis showed that changes of soil organic carbon and ammonium content were the main factors driving soil microbial community.

Key words: moso bamboo expansion, phospholipid fatty acids, soil microbial community, microbial diversity