生态环境学报 ›› 2022, Vol. 31 ›› Issue (5): 909-917.DOI: 10.16258/j.cnki.1674-5906.2022.05.006

• 研究论文 • 上一篇    下一篇

不同土地整治类型新增耕地土壤微生物群落特征研究

朱奕豪1(), 李青梅2, 刘晓丽3, 李娜2, 宋凤玲4, 陈为峰1,*()   

  1. 1.山东农业大学资源与环境学院,山东 泰安 271018
    2.山东省土地发展集团有限公司,山东 济南 250014
    3.山东省国土空间生态修复中心,山东 济南 250014
    4.泰安市国土空间生态修复中心,山东 泰安 271099
  • 收稿日期:2022-02-18 出版日期:2022-05-18 发布日期:2022-07-12
  • 通讯作者: * 陈为峰(1970年生),男,教授,博士研究生导师,主要研究方向为退化土壤生态治理和土地生态整治。E-mail: chwf@sdau.edu.cn
    * 陈为峰(1970年生),男,教授,博士研究生导师,主要研究方向为退化土壤生态治理和土地生态整治。E-mail: chwf@sdau.edu.cn
  • 作者简介:朱奕豪(1992年生),男,博士研究生,主要从事退化土壤生态治理研究。E-mail: yihao3344lin@163.com
  • 基金资助:
    山东省重点研发计划项目(2021CXGC010704);山东省土地发展集团科研基金项目(202107-YJYJS-016);泰安市国土空间生态修复中心科研项目

Characteristics of Soil Microbial Community in Newly Cultivated Land under Different Land Consolidation Types

ZHU Yihao1(), LI Qingmei2, LIU Xiaoli3, LI Na2, SONG Fengling4, CHEN Weifeng1,*()   

  1. 1. College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, P. R. China
    2. Shandong Land Development Group Co., Ltd, Ji'nan 250014, P. R. China
    3. Shandong Provincial Land Space and Ecological Restoration Center, Ji'nan 250014, P. R. China
    4. Tai'an Land Space and Ecological Restoration Center, Tai'an 271099, P. R. China
  • Received:2022-02-18 Online:2022-05-18 Published:2022-07-12

摘要:

为了揭示不同土地整治类型新增耕地土壤微生物群落特征,以山东省泰安市34个土地整治项目(工矿复垦,GK;占补平衡,ZB)作为研究对象,就近选取非土地整治形成的农田作为对照,采用微生物平板计数法和高通量测序技术研究两类新增耕地与对照耕地的土壤微生物数量、多样性及群落组成等土壤微生物群落特征。结果表明,(1)与对照耕地相比,两类新增耕地土壤容重变大,有机质及氮磷钾含量降低,其中全氮和有效磷含量变化规律明显,均表现为GK<ZB<CK;两类新增耕地土壤容重最大值均出现在宁阳县,工矿复垦和占补平衡新增耕地分别比对照耕地变大了22.96%和25.19%。(2)两类新增耕地土壤细菌、放线菌数量低于对照耕地,真菌数量高于对照耕地;两类新增耕地土壤细菌数量最大值均出现在东平县,分别达到了11.89×105 cfu∙g-1和26.22×105 cfu∙g-1。(3)两类新增耕地土壤细菌Shannon指数、Ace指数和Chao1指数小于对照耕地;两类新增耕地及对照耕地的优势菌群均为放线菌门、厚壁菌门、变形菌门、绿弯菌门、酸杆菌门等;冗余分析(RDA)显示土壤有机质(SOM)是驱动土壤微生物群落变化的主要因子,该文选定的7个土壤理化性状累计解释量为82.40%,SOM单独解释量达52.00%,因此,土壤有机质成为了两类新增耕地重点调控的指标,有机质含量直接关系到新增耕地的土壤质量。该项结果将为土地整治新增耕地土壤改良指明方向。

关键词: 土地整治, 新增耕地, 微生物数量, 微生物群落组成, 高通量测序

Abstract:

To reveal the characteristics of soil microbial communities in new cultivated land of different land consolidation types, 34 land consolidation projects (industrial and mining reclamation, GK; balancing occupation and reclamation, ZB) in Tai'an city of Shandong province were studied, and nearby farmland (not formed by land consolidation) was the CK. Microbial plate counting method and high-throughput sequencing technology were utilized to study the quantity, diversity, and community composition of soil microorganisms in two types of new cultivated land and CK. The results showed that (1) compared with CK, the soil bulk density (BD) of the two types of new cultivated land increased, and the contents of soil organic matter (SOM), total nitrogen (TN), available phosphorus (AP), and available potassium (AK) decreased, among which the contents of TN and AP changed significantly, showing GK<ZB<CK; the maximum BD value in the two types of newly cultivated land was found in Ningyang county, and GK and ZB were 22.96% and 25.19%, respectively, larger than those of the CK. (2) The quantities of soil bacteria and actinomycetes in the two types of newly land were lower than that in CK, while the quantity of fungi was higher than that in CK. The maximum value of soil bacteria in the two types of new cultivated land appeared in Dongping county, reaching 11.89×105 cfu∙g-1 and 26.22×105 cfu∙g-1, respectively. (3) The soil microbial indexes, such as Shannon, Ace, and Chao1, in the two types of newly cultivated land were lower than those of CK. Actinobacteriota, Firmicutes, Proteobacteria, Chloroflexi, and Acidobacteriota were the dominant flora of the two types of newly cultivated land and CK. Redundancy analysis (RDA) showed that SOM was the main factor driving the change of soil microbial communities, the cumulative interpretation of seven soil physical-chemical properties selected in this paper was 82.40%, and the independent interpretation of SOM was 52.00%. Therefore, SOM has become the key regulation index of two types of new cultivated land; the content of SOM is directly related to the soil quality of new cultivated land. These results shed light on the improvement of soil quality of new cultivated land.

Key words: land consolidation, newly cultivated land, microbial quantity, microbial community composition, high-throughput sequencing

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