中文摘要：

以从西南岩溶地区土壤中筛选出来的典型细菌、真菌和放线菌为材料，进行了微生物对石灰岩的溶蚀动态模拟实验，比较了3种不同种类微生物的溶蚀作用效果．结果表明，各实验体系的pH值、钙离子浓度均发生有规律的变化．3种典型微生物试验组对石灰岩试片的溶蚀效果均较对照组好，其中，真菌的溶蚀效果最显著，石灰岩试片失重最大，达到5．15％，实验体系中钙离子浓度最高达233mg／L．扫描电镜结果亦显示，经3种典型微生物作用后试片表面的微观形貌均发生了较大的变化，其中真菌试验组的试片形貌变化最大，溶蚀效果最好．图4参21

英文摘要：

In order to study the corrosion effect of microbes on limestone, a simulative experiment was carried out in lab by using three kinds of microbes （bacteria, fungi and actinomycetes ）, which were separated from soil in karst areas of southwestern China. The results showed that the corrosion ability of those microbes was different. In the experiment, the values of pH and Ca^2＋ concentration changed regularly with time. The corrosion effect of those microbes was greater than that of CK at the end of experiment. The weight-losing proportions caused by fungi, actinomycete and bacteria were 4.41, 1.46 and 1.51 times higher than that of CK. The corrosion ability of fungi was the strongest, with the weight-losing of limestone about 5.15% and the concentration of Ca^2 ＋ 233 mg/L. Moreover, the scanning electron microscopy （SEM） analysis showed that the surface shape of cubes was different at the end of the experiment and the change in surface shape caused by fungi was the greatest, which suggested that the corrosion ability of fungi was the greatest. The results would provide a scientific basis for evaluating the roles and status of different kinds of microbes in biokarst. Fig 4, Ref 21