宁夏沙坡头人工植被区土壤真菌种群的动态研究

目的]研究宁夏沙坡头人工植被区不同沙丘土样在不同时间、不同土层真菌的变化情况。方法]以9个沙地土样与1个土壤土样作比较,对不同时间、不同土层真菌的种类、数量和分布进行了比较分析。结果]同一样地环境、不同空间层次以及不同样地环境、相同空间层次草地土壤真菌数量变化均较大,而各土壤类型的真菌数量分布均以翠柳沟(天然荒漠草原)最多、流沙最少;在不同固沙地类型中,翠柳沟真菌种类和数目最多。结论]人工植被区土壤真菌的数量随固沙年代的增加而增加,因此加强沙地的植被建设和人工管理有助于改善沙漠化现状。

Dynamic Study on Soil Fungi Population in Artificial Vegetation Areas of Sha Potou in Ningxia

Objective] The change of fungi in different soil layers and sand dunes of artificial vegetation areas in Ningxia Sha Potou during different times was studied.Method]The number of soil fungi in different soil layers at same plot and in same soil layer at different plots was changed significantly.The quantitative distribution of fungi was the most in Cuiliugou but the fewest in quicksand among all soil types.Result] The quantity of soil fungi in grasslands varied both with the same sample plot in different soil layers and in the same soil layer with different sample plots.The quantity of fungi from different soil types distributed mostly in Cui Liugou,a natural desert steppe,but little in quicksand.The species and quantity of fungi in Cui Liugou was the most in different types of sand-fixing lands.Conclusion] The quantity of soil fungi in artificial vegetation areas raises with the increase of sand-fixing ages,so it is helpful for improving the present trends of desertification to enhance vegetation of construction in sandy land and artificial management practices.