在科尔沁沙地西南部的流动沙丘上固沙造林,不同造林时间和不同造林树种的沙丘土壤中细菌、放线菌和真菌等类群和生理群的微生物生长情况不同、林地土壤中微生物都比流动沙丘中繁殖旺盛。造林时间长的沙丘又比造林时间短的沙丘土壤微生物增殖量大。有林木生长的沙丘上层土壤也比下层土壤微生物的数量大,沙丘结皮层中尤为明显。 In the sandy dune in the southwest of Horqin sandy land, the growth of microorganisms such as bacteria, actinomycetes and fungi in the sand dunes with different afforestation time and different afforestation species was different from those in the physiology group. In the strong reproduction. Sand dunes with long afforestation time and soil dunes with shorter afforestation time had more soil microbial proliferation. The top layer of soils with forest growth was also larger than that of the lower layer of soil microbes, especially in the dune cortex.