Arid
项目编号41371505
科尔沁沙地植被重建区土壤氮转化菌群结构形成演变及环境驱动效应
曹成有
主持机构东北大学
开始日期2014
结束日期2017
资助经费750000(CNY)
项目类别面上项目
资助机构CN-NSFC(国家自然科学基金)
语种中文
国家中国
英文简介Soil nitrogen is one of the most crucial limiting factors for the growth of plants in sandy land, and soil microbes play core roles in the processes of transformation and utilization of nitrogen. The diversity and community structure evolvement of nitrogen-cycling microbes due to re-vegetation on moving sand land have not been widely studied in most former researches. In this project, the representative sand-fixation plantations in the Horqin Sandy Land will be selected as study objects. Based on purposeful considerations of the key microbiological processes and the involved functional genes encoding corresponding enzymes in soil nitrogen cycle, the diversities and their temporal and spatial variations of soil nitrogen-fixing, nitrifying and denitrifying microbes in the re-vegetation areas will be studied by the techniques of modern molecular biology and bioinformatics. The purposes of this study are to discover the population fluctuations and structure evolvement of soil nitrogen-cycling microflora during the plantation development, and the temporal and spatial heterogenities of sand-fixation community structure, soil environment and nitrogen-transforming function. Furthermore, the coupling relationship among soil environment, vegetation, microflora structure and nitrogen-transforming function, the effect of environmental drive on the evolvement of soil microflora structure, and the biological mechanism of soil nitrogen variation will be revealed on the basis of above studies. The results submitted by this project will enrich the basic data of soil microbial diversity and its function in the semi-arid sandy area, and will provide some scientific fundamentals for the practices of biodiversity conservation, ecological restoration and soil quality evaluation, and sand-fixing vegetation management of sandy land.
中文关键词环境效应 ; 生物多样性 ; 群落结构 ; 氮循环 ; 荒漠生态系统
来源机构东北大学
资源类型项目
条目标识符http://119.78.100.177/qdio/handle/2XILL650/345642
推荐引用方式
GB/T 7714
曹成有.科尔沁沙地植被重建区土壤氮转化菌群结构形成演变及环境驱动效应.2014.
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