摘要
内蒙古鄂尔多斯皇甫川流域恢复草地和退化草地土壤微生物类群数量分布特征的研究结果表明:恢复草地和退化草地土壤微生物各类群数量是,好气性细菌>放线菌>芽孢型细菌>真菌;0～10cm的微生物总数超过其他土层,其垂直分布的基本趋势是0～10cm>10～20cm>20～30cm>30～40cm>40～50cm;微生物各类群中,细菌是最多的一个类群,这一结果取决于好气性细菌的数量;恢复草地各土层中的土壤微生物类群数量均高于退化草地;在恢复草地的土壤微生物数量中,好气性细菌,芽孢型细菌,放线菌,真菌为秋季大于夏季;土壤微生物数量与土壤肥力有着密切的关系,恢复草地是防止皇甫川流域草地退化,提高土壤质量,保护生态环境的重要措施。
The distribution characteristics of soil microbial have been investigated for the recovered grassland and degenerated grassland of Huang Fu-chuan Watershed, Inner Mongolia, China. Soil microbial numbers in both recovered grassland and degenerated grassland are all followed the order: aerobacteria>actinomyces>spore-forming bacteria>fungi; Total microbial numbers in 0～10 cm was more than that in the other soil layers, the vertical distribution of total microbial number was: 0～10 cm > 10～20 cm>20～30 cm>30～40 cm>40～50 cm, which decreased along with soil depths. Microfauna was various in different plots. Bacteria's number was the most in all groups, and its variation trend rests with the amount of aerobacteria.;Compared with the degenerated grassland the number of soil microbial groups was higher in the recovered grassland. The number of soil microbial in recovered grassland, such as aerobacteria, spore-forming bacteria, actinomyces and fungi, was higher in autumn than in summer. The distribution characteristics of microbial number in natural grassland related to soil fertility factors, the status of recovered grassland exceeded that of degenerate grassland, so the recovering of grassland is the key measure for improving soil quality and protecting the ecological environment of Huang Fu-chuan Watershed.
出处
《中国沙漠》
CSCD
北大核心
2004年第2期223-226,共4页
Journal of Desert Research
基金
国家自然科学基金(30060018)
内蒙古自然科学基金(20010905 01)资助
关键词
生态环境建设
恢复草地
退化草地
土壤微生物
土壤肥力
Inner Mongolia
Huang Fu-chuan Watershed
recovered grassland
degenerated grassland
soil microbial
distribution characteristics
