Xinjiang Agricultural Sciences ›› 2018, Vol. 55 ›› Issue (4): 726-736.DOI: 10.6048/j.issn.1001-4330.2018.04.017

Previous Articles     Next Articles

Effects of Reclamation on the Composition and Structure of Soil Bacterial Communities in Abandoned Salinized Farmland

YANG Lei, ZHANG Yu-long, JIANG Tong-xuan, ZHANG Feng-hua   

  1. Key Laboratory of Oasis Eco-agriculture of Xinjiang Production and Construction Corps, College of Agronomy, Shihezi University, Shihezi Xinjiang 832003, China
  • Received:2018-01-26 Online:2018-04-20 Published:2018-07-18
  • Correspondence author: ZHANG Feng-hua (1970- ), female, professor, doctoral supervisor, research field: arid land resources and environment. (E-mail) zfh2000@126.com
  • Supported by:
    The National Natural Science Foundation of China (31560359) and Special Research Fund for Public Nonprofit Industries (201503120)

开垦对盐渍化弃耕地土壤细菌群落组成和结构的影响

杨磊,张玉龙,姜同轩,张凤华   

  1. 石河子大学/新疆生产建设兵团绿洲生态农业重点实验室,新疆石河子 832003
  • 通讯作者: 张凤华(1970-),女,教授,博士生导师,研究方向为干旱区资源与环境,(E-mail)zfh2000@126.com
  • 作者简介:杨磊(1992-),男,新疆伊犁人,硕士研究生,研究方向为土壤环境与生态安全,(E-mail)lei.yang1224@qq.com
  • 基金资助:
    国家自然科学基金项目(31560359);公益性行业科研专项(201503120)

Abstract: 【Objective】 Abandoned salinized land in Xinjiang of China is being reclaimed for cotton production. The effect of reclamation on soil quality and function was obtained by comparing the changes of soil bacterial communities before and after reclamation.【Method】The specific objectives of this field study were: (1) to compare bacterial composition and diversity in unfarmed (i.e., unreclaimed) and cropped soils and (2) to explore the specific functions of the flora identified by Illumina MiSeq sequencing.【Result】Reclamation significantly reduced soil EC and available K, and significantly increased SOM, available N, and available P. Bacterial species richness and diversity increased when abandoned farmland was reclaimed for cotton production. Proteobacteria and Firmicutes were the dominant phyla in unfarmed soil. Reclamation reduced the relative abundance of Firmicutes, but increased the contents of Chloroflexi, Acidobacteria, and Actinobacteria. Cluster analyses showed that there was a significant difference in the bacterial community between the abandoned farmland and the cultivated land after the reclamation.【Conclusion】In general, cotton production after reclamation improved soil physical and chemical properties and changed the structure and composition of soil bacterial communities compared with unfarmed soil.

Key words: reclamation; soil bacterial community; MiSeq sequencing; bacterial diversity

摘要: 【目的】新疆盐碱弃耕地开垦后用于棉花的种植,研究比较开垦前后土壤细菌群落的变化,分析开垦对土壤质量和功能的影响。【方法】通过Illumina MiSeq测序,比较弃耕地与开垦后种植棉花的土壤细菌群落的组成和多样性;探索菌群所具有的特定功能。【结果】开垦显著地降低了土壤电导率和速效钾含量,显著地增加了土壤有机质、碱解氮和速效磷含量。弃耕地开垦为棉田后增加了细菌物种的丰富度和多样性。Proteobacteria和Firmicutes是弃耕地土壤中主要的细菌门。开垦降低了Firmicutes的相对丰度,但是增加了Chloroflexi, Acidobacteria和Actinobacteria的相对丰度。聚类分析显示弃耕地与开垦后农田的细菌群落有明显的差异性。【结论】开垦后进行棉花生产提高了土壤理化特性,改变了土壤细菌群落组成和结构。

关键词: 开垦, 土壤细菌群落, MiSeq测序, 细菌多样性

CLC Number: