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亚高山草甸弃耕地恢复演替过程中土壤微生物多样性研究

发表时间:2011-03-15  浏览量:1602  下载量:761
全部作者: 王萍,李金花,寇淑娴,高荣庆
作者单位: 兰州大学干旱与草地生态教育部重点实验室
摘 要: 利用氯仿熏蒸法和BIOLOG-ECO技术,分别研究中国青藏高原东部亚高山草甸弃耕地演替过程中土壤微生物生物量以及微生物功能多样性的变化。结果表明:弃耕时间对土壤微生物多样性有很大影响。在演替过程中,弃耕时间为11年的土壤微生物对全部碳源的利用能力最强,生理代谢活性最高,在0~168 h内,其平均每孔吸光值(average well color development,AWCD)变化最显著;土壤微生物碳的质量分数及有机质的质量分数相对较高;土壤微生物群落的丰富度、均匀度及多样性指数也相对较高,说明弃耕11年对土壤微生物群落结构和功能的多样性影响最大,可有效改变草地的恢复状况。
关 键 词: 生态学;弃耕时间;亚高山草甸;土壤微生物群落;功能多样性
Title: Functional diversity of soil microbial communities during restoration process of abandoned-fields in sub-alpine meadows
Author: WANG Ping, LI Jinhua, KOU Shuxian, GAO Rongqing
Organization: Key Laboratory of Arid and Grassland Ecology of the Ministry of Education, Lanzhou University
Abstract: Using chloroform fumigation and BIOLOG-ECO technology, soil microbial biomass carbon and functional diversity were studied in the abandoned-fields of a sub-alpine meadow in the eastern Tibetan Plateau of China. The results showed that the abandoned time had a great impact on soil microbial diversity. Soil microbes of 11-year abandoned time had the highest utilization ability of carbon source and the physiological metabolic activity. Changes of average well color development (AWCD) were most significant in the 0~168 h; mass content of soil microbial carbon and organic carbon were relatively higher; the richness, evenness, and diversity index of soil microbial community were relatively higher. These indicated that 11-year abandoned time was effective to alter the structure and functional diversity of soil microbial community, which would be helpful for restoration of sub-alpine meadow.
Key words: ecology; abandoned time; sub-alpine meadow; soil microbial community; functional diversity
发表期数: 2011年3月第5期
引用格式: 王萍,李金花,寇淑娴,等. 亚高山草甸弃耕地恢复演替过程中土壤微生物多样性研究[J]. 中国科技论文在线精品论文,2011,4(5):395-402.
 
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