初步调查了广州市白云山土壤中细菌、放线菌和真菌等微生物．在人为活动频繁的样地土壤微生物的多样性及其生物量均大于森林内的３个样地．土壤微生物的生物量高峰期出现在秋冬季节．用不同污染程度的水处理土壤１５ｄ后，以蒸馏水（ｐＨ７．０）处理为对照，土壤微生物种类多样性的顺序为：蒸馏水＞溪水（ｐＨ５．４）＞雨水（ｐＨ４．８）＞污水（ｐＨ４．２）；而土壤微生物的生物量则无显著变化 Preliminary investigation of the soil in Guangzhou Baiyun Mountain bacteria, actinomycetes and fungi and other microorganisms. The diversity and biomass of soil microorganisms in the plots with high man-made activities were all greater than those in the three plots in the forest. The peak of soil microbial biomass appears in autumn and winter. After treated with different levels of water for 15 days, the order of microbial diversity was as follows: distilled water> stream water (pH5.4)> rain water (pH4.8)> sewage water (pH4) .2), while there was no significant change in soil microbial biomass