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冰川冻土 ›› 2014, Vol. 36 ›› Issue (1): 207-213.doi: 10.7522/j.issn.1000-0240.2014.0026

• 寒旱区生物学 • 上一篇    下一篇

青藏公路对其邻近土壤细菌丰度影响的研究

龙昊知1, 孙丽坤1, 刘光琇1, 伍修锟1, 台喜生1, 王艺霖2, 刘永俊3, 冯虎元3   

  1. 1. 中国科学院 寒区旱区环境与工程研究所 沙漠与沙漠化重点实验室, 甘肃 兰州 730000;
    2. 兰州交通大学 化学与生物工程学院, 甘肃 兰州 730070;
    3. 兰州大学 生命科学学院, 甘肃 兰州 730000
  • 收稿日期:2013-08-12 修回日期:2013-12-19 出版日期:2014-02-25 发布日期:2014-03-18
  • 通讯作者: 刘光琇,E-mail:liugx@lzb.ac.cn E-mail:liugx@lzb.ac.cn
  • 作者简介:龙昊知(1987-),男,江西南昌人,2011年毕业于江西农业大学,现为中国科学院寒区旱区环境与工程研究所在读博士研究生,主要从事环境微生物研究. E-mail:longhaozhi1987@126.com
  • 基金资助:

    国家自然科学基础人才培养基金冰川学冻土学特殊学科点项目(J1210003/J0109);国家重点基础研究发展计划(973计划)项目(2012CB026105);国家自然科学基金项目(41271265)资助

Effect of the Qinghai-Tibet Highway on surrounding soil bacterial abundance

LONG Haozhi1, SUN Likun1, LIU Guangxiu1, WU Xiukun1, TAI Xisheng1, WANG Yilin2, LIU Yongjun3, FENG Huyuan3   

  1. 1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    3. School of Life Sciences, Lanzhou University, Lanzhou 730000, China
  • Received:2013-08-12 Revised:2013-12-19 Online:2014-02-25 Published:2014-03-18

摘要:

以垂直青藏公路不同距离样带土壤为研究样本,研究了距青藏公路10~500 m范围内土壤细菌丰度的变化及其影响因素. 结果表明:青藏公路沿线土壤细菌丰度为2.71×107~7.20×108copies·g-1dw;距公路10~500 m土壤细菌丰度呈现出递增趋势,且以50 m为界限,50~500 m细菌丰度没有显著差异. 土壤细菌丰度与环境因子的相关性表明:青藏公路沿线土壤细菌丰度主要受土壤总氮、总有机碳以和植被盖度的影响,表现为细菌丰度与土壤总氮极显著正相关,与总有机碳显著正相关,与植被盖度极显著正相关. 上述结果说明,青藏公路对土壤细菌丰度的影响范围在50 m左右.

关键词: 青藏公路, 土壤细菌丰度, 土壤理化性质, 环境因子

Abstract:

In this study, the change trends of bacterial abundances and the affecting factors in soils of various belts (ranging from 10 m to 500 m) parallel to the Qinghai-Tibet Highway were investigated. Along the highway, the abundances of bacteria in the soils range from 2.71×107 copies·g-1dw to 7.20×108 copies·g-1dw. Perpendicular to the highway, the abundances of bacteria in the soils increase from 10 m to 500 m and then turn to stationary, with a significant boundary at the distance of 50 m. Correlation analyses between the environmental factors and the abundances of bacteria in the soils indicate that the soil bacterial abundance have significant positive correlation with the total nitrogen, the total organic carbon and the vegetation coverage. The study results indicate that the distance of the Qinghai-Tibet Highway influencing the soil bacterial abundance is approximately 50 m.

Key words: Qinghai-Tibet Highway, soil bacterial abundance, soil physicochemical properties, environmental factors

中图分类号: 

  • Q939.1