蒙古沙冬青根围土壤微生物分布及与土壤因子相关性研究

发布时间：2018-05-25 02:30

本文选题：土壤微生物 + 土壤因子　；参考：《干旱区资源与环境》2016年04期

【摘要】：为了探明蒙古沙冬青(Ammopiptanthus monglicus)根围土壤微生物分布和土壤因子生态作用,2012年6月选取内蒙古磴口、阿拉善左旗和乌拉特后旗3个样地,按0-10、10-20、20-30、30-40、40-50cm5个土层采集根围土壤样品,系统研究了土壤微生物数量和生态分布。结果表明:五大类土壤微生物数量及分布与蒙古沙冬青及样地生态条件有关,不同样地不同土层微生物数量差异显著,垂直动态分布明显。3样地均是细菌芽孢菌放线菌固氮菌真菌。0-20cm土层显著高于其它土层,最大值均在10-20cm,并随土层加深,数量有减少趋势。同一土层,磴口的土壤细菌、芽孢菌、固氮菌、放线菌显著高于乌拉特后旗和阿拉善左旗;乌拉特后旗的真菌显著高于磴口和阿拉善左旗。相关性分析表明:土壤细菌、真菌和放线菌均与土壤有机C、碱解N和碱性磷酸酶极显著正相关。
[Abstract]:In order to find out the distribution of soil microbes and the ecological effects of soil factors in the root environs of Ammopiptanthus monglicus, in June 2012, three soil samples were collected from Dengkou, Alashan and Houqi, Inner Mongolia. The samples were collected from 0 ~ 1010 ~ 10 ~ 20 ~ 20 ~ 20 ~ 30 ~ 30 ~ 30 ~ 40 ~ 40 ~ 50 cm ~ (-1) soil layers. The quantity and ecological distribution of soil microorganisms were studied systematically. The results showed that the number and distribution of five kinds of soil microbes were related to the ecological conditions of Holly mongolica and sample plots, and there were significant differences in the number of microbes in different soil layers. The vertical dynamic distribution of bacteria, actinomycetes, nitrogen-fixing fungi, fungi in the soil layer of 0-20 cm was significantly higher than that in other soil layers, the maximum value was 10-20 cm, and with the deepening of soil layer, the number of the soil decreased. In the same soil layer, soil bacteria, spores, nitrogen-fixing bacteria, actinomycetes in Dengkou were significantly higher than those in Houqi and Alashan, and fungi in the latter were significantly higher than those in Dengkou and Alashanzuo. Correlation analysis showed that soil bacteria, fungi and actinomycetes were significantly positively correlated with soil organic C, alkaline N and alkaline phosphatase.
【作者单位】：河北大学生命科学学院;河北大学药学院;
【基金】：国家自然科学基金项目(31170488)资助
【分类号】：S154.3

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