湖北农业科学 ›› 2023, Vol. 62 ›› Issue (9): 44-50.doi: 10.14088/j.cnki.issn0439-8114.2023.09.008

• 资源·环境 • 上一篇    下一篇

不同植被类型下黑河湿地土壤养分、酶活性、微生物数量的变化特征

彭轶楠1, 祁宏山1, 裴延礼2, 席鹏1, 季彬1   

  1. 1.甘肃科学院生物研究所/甘肃省微生物资源开发利用重点实验室,兰州 730000;
    2.高台县黑河湿地国家级自然保护区管理局,甘肃 高台 734300
  • 收稿日期:2022-08-05 出版日期:2023-09-25 发布日期:2023-10-24
  • 通讯作者: 季 彬(1983-),男,副研究员,主要从事功能性微生物筛选及其相关综合利用技术的研发、推广应用。
  • 作者简介:彭轶楠(1988-),女,甘肃兰州人,副研究员,硕士,主要从事微生物育种及应用,(电话)13919333465(电子信箱)pyn0926@sina.com。
  • 基金资助:
    甘肃省科学院产业化项目(2021CY-02); 甘肃省科学院2015年院列产业化项目

The variation characteristics of soil nutrient, enzyme activity and microbial count under different vegetation types of Heihe wetland

PENG Yi-nan1, QI Hong-shan1, PEI Yan-li2, XI Peng1, JI Bin1   

  1. 1. Institute of Biology, Gansu Academy of Sciences/Key Laboratory of Microbial Resources Exploitation and Application of Gansu Province, Lanzhou 730000, China;
    2. Heihe Wetland National Nature Reserve Administration of Gaotai County, Gaotai 734300, Gansu, China
  • Received:2022-08-05 Online:2023-09-25 Published:2023-10-24

摘要: 研究了栽种不同植被对湿地生态系统的恢复成效,以期为完善黑河湿地恢复策略提供科学依据。于2016年开展植被恢复工程,在黑河北岸红军纪念林以西分别栽种2年生的沙枣(Elaeagnus angustifolia)、红柳(Tamarix chinensis) 和胡杨(Populus euphratica),2020年12月采集各植被的根际土壤,同时以不栽种植被自然恢复方式为对照,研究栽种不同植被后土壤养分、酶活性和微生物数量间的差异及相关性。结果表明,植被恢复改善了黑河湿地生态环境,缓解了湿地盐碱化;栽种沙枣对降低土壤盐分含量、提高土壤有机质和碱解氮含量效果最明显;栽种胡杨对提高土壤速效磷、速效钾含量及土壤脲酶和碱性磷酸酶活性效果最明显;栽种红柳对提高土壤微生物总量效果最明显;土壤养分含量、酶活性和微生物数量间具有密切相关性。总体来看,植被恢复工程降低了黑河湿地土壤盐分,提高了土壤养分含量、酶活性和微生物数量,对黑河湿地的生态系统恢复行之有效。

关键词: 植被恢复, 土壤养分, 土壤酶活性, 微生物数量, 黑河湿地

Abstract: To provide a scientific basis for improving the restoration strategy of the Heihe wetlands, the effectiveness of planting different vegetation on the restoration of wetland ecosystems was studied. In 2016, a vegetation restoration project was carried out to plant 2-year-old Elaeagnus angustifolia, Tamarix chinensis and Populus euphratica respectively in the west of the Red Army Memorial Forest on the northern bank of the Heihe, and the rhizosphere soil of each vegetation was collected in December 2020, while the natural restoration without vegetation was used as a control to study the differences and correlations of soil nutrients, enzyme activities and microbial quantity among planting different vegetations. The results showed that vegetation restoration improved the ecological environment and alleviated the salinization of Heihe wetland; planting Elaeagnus angustifolia had the most significant effect on reducing soil salinity, and increasing the content of soil organic matter and alkali-hydrolyzale nitrogen; planting Populus euphratica had the most significant effect on increasing the content of available phosphorus and available potassium, as well as the activity of urease and alkaline phosphatase in soil; planting Tamarix chinensis had the most significant effect on increasing the total soil microbial quantity; there was a close correlation between soil nutrients content, enzyme activity and microbial quantity. In total, the vegetation restoration project reduced soil salinity in the wetland, and increased the nutrients content, enzyme activity and microbial quantity of soil, and the vegetation restoration was effective for ecosystem restoration in the Heihe wetland.

Key words: vegetation restoration, soil nutrient, soil enzyme activity, microbial quantity, Heihe wetland

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