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中国沙漠 ›› 2022, Vol. 42 ›› Issue (2): 207-214.DOI: 10.7522/j.issn.1000-694X.2021.00131

• • 上一篇    

乌拉特天然梭梭( Haloxylon ammodendron )林土壤微生物多样性及其与土壤性质的关系

陈峰1(), 张静2, 韩二牛1, 温苏雅拉图null3, 李盛林1, 王国林3, 王磊4, 王少昆5()   

  1. 1.巴彦淖尔市乌拉特国家级自然保护区管理局,内蒙古 巴彦淖尔 015000
    2.内蒙古林业和草原保护总站,内蒙古 呼和浩特 010020
    3.乌拉特梭梭林蒙古野驴国家级自然保护区乌拉特后旗管理站,内蒙古 巴彦淖尔 015000
    4.巴彦淖尔市乌拉山林业管护中心,内蒙古 巴彦淖尔 015000
    5.中国科学院西北生态环境资源研究院 乌拉特荒漠草原研究站,甘肃 兰州 730000
  • 收稿日期:2021-08-16 修回日期:2021-10-19 出版日期:2022-03-20 发布日期:2022-03-30
  • 通讯作者: 王少昆
  • 作者简介:王少昆(E-mail: wangsk@lzb.ac.cn
    陈峰(1971—),男,内蒙古固阳人,工程师,研究方向为林学。E-mail: 814611411@qq.com
  • 基金资助:
    国家自然科学基金项目(41771117);国家科技基础资源调查专项(2017FY100200);内蒙古乌拉特梭梭林-蒙古野驴国家级自然保护区生态监测项目(E1900504)

Soil microbial diversity and its relationship with soil physicochemical properties in Urat natural Haloxylon ammodendron forest

Feng Chen1(), Jing Zhang2, Erniu Han1, Wensuyalatu3, Shenglin Li1, Guolin Wang3, Lei Wang4, Shaokun Wang5()   

  1. 1.Bureau of Urat National Nature Reserve in Bayan Nur City,Bayan Nur 015000,Inner Mongolia,China
    2.Master Station of Forestry and Grassland Protection in Inner Mongolia,Hohhot 010020,China
    3.Urat Rear Banner Station of Urat Haloxylon ammodendron and Equus hemionus National Nature Reserve,Bayan Nur 015000,Inner Mongolia,China
    4.Bayan Nur Wulashan Forestry Management and Protection Center,Bayan Nur 015000,Inner Mongolia,China
    5.Urat Desert-grassland Research Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2021-08-16 Revised:2021-10-19 Online:2022-03-20 Published:2022-03-30
  • Contact: Shaokun Wang

摘要:

梭梭(Haloxylon ammodendron)是优良的固沙树种,在干旱区生态建设和经济创收中起着重要的作用。本研究以内蒙古乌拉特后旗天然梭梭林为研究对象,对梭梭林下(Ha)和林外裸露沙地(BS)中土壤微生物多样性和土壤理化性质进行测定,并分析了微生物多样性与土壤性质的相关关系。结果表明:天然梭梭林土壤细菌和真菌的香浓多样性指数(Shannon)、物种丰富度指数(Chao1)和系统发育多样性指数(PD)均显著高于裸露土壤;梭梭林下土壤全碳和全氮比裸沙对照分别高1.73倍和2.12倍,土壤黏粉粒含量比裸沙土壤高2.6倍,林下土壤含水量显著低于裸沙对照。梭梭林改善了土壤养分和土壤质地,从而对土壤微生物多样性产生影响。土壤细菌和真菌多样性指数均与土壤全碳、全氮、pH值、电导率呈显著正相关,与碳氮比、含水量和细砂含量呈显著负相关。结构方程模型分析结果表明,地表植物和土壤pH值直接影响了土壤细菌多样性,土壤全碳和含水量直接影响了土壤真菌多样性,梭梭林的生长通过改变土壤全碳和含水量对土壤真菌多样性产生间接影响。

关键词: 梭梭(Haloxylon ammodendron)林, 微生物多样性, 土壤特征, 高通量测序

Abstract:

Haloxylon ammodendron is a widely used plant species for sand stabilization. It plays an important role in arid land development ecologically and economically. We chose natural H. ammodendron forest (Ha) to measure the soil microbial diversity and soil physicochemical properties, and analyze their relationships in Urat Rear Banner of Inner Mongolia. Bare sand (BS) was set as control. The results showed that both the soil bacterial and fungal diversities, including Shannon diversity index, Chao1 richness index and Phylogenetic diversity index were significantly higher in Ha than those in BS. Soil total carbon and nitrogen content were 1.73 and 2.21 times higher in Ha than those in BS. Soil silt and clay content was 2.6 times higher in Ha than that in BS. Soil water content was significantly lower in Ha than that in BS. H. ammodendron improved soil nutrients and soil texture, and consequently impact on soil microbial diversity. Soil bacterial and fungal diversities were positively correlated with soil total carbon and nitrogen contents, pH and electrical conductivity, while negatively correlated with soil C∶N, soil water content and fine sand content. Structural equation models (SEM) revealed that vegetation and soil pH directly influenced soil bacterial diversity. Soil fungal diversity was directly influenced by soil total carbon and soil water content, and indirectly influenced by vegetation.

Key words: Haloxylon ammodendron, microbial diversity, soil property, high throughout sequencing

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