中文摘要：

贵州省喀斯特地区石漠化严重。该研究以贵州省普定县石漠化治理示范基地为例，通过在基地取样进行室内实验，分析不同种植模式土壤有机质含量与微生物数量的关系。结果显示通过近几年对研究区的石漠化生态治理，以耕地为对照，不同种植模式土壤微生物数量都有提高，其中杉树模式微生物总数极显著高于其它模式；所有种植模式中除杉树的有机质含量小于耕地及外，其它种植模式除花椒外有机质含量都极显著高于耕地，其中竹子＋家禽有机质含量最高。不同种植模式两两之间的土壤有机质含量、微生物数量在治理过程中大多产生了显著差异甚至极显著差异。通过对不同种植模式土壤有机质含量与微生物数量变化分析，随着有机质含量的下降微生物总数总体也呈现下降趋势。通过计算显示有机质含量与细菌、真菌呈现负相关，相关系数分别为-0．301，-0．101；与放线菌、微生物总数呈现正相关，相关系数分别为0．795、0．141。由于在冬末春初采样，虽然有机质含量处于高峰期，但由于受低温、干燥等自然因素的影响，不利于细菌、真菌生长繁殖，两者数量处于低水平。即使冬季是放线菌生长旺盛期，但微生物群落中细菌所占比例最大，占有绝对优势，微生物总数变化与细菌数量变化一致，所以有机质对微生物数量的影响较小，相关性不是很明显。

英文摘要：

Rocky desertification is serious in karst areas of Guizhou Province. Taking the rocky desertification control demonstration base in Puding County, Guizhou Province as an example, by sampling from the base for laboratory experiment, relationship between soil organic matter content and number of microorganism of different cropping patterns was analyzed. Results showed that through ecological control of rocky desertification in the study area in recent years, the quantity of mi- croorganism in different cropping patterns has improved compared with arable land, with total microbial number of cedar mode significantly higher than other modes. For all cropping patterns, in addition to organic matter content of cedar less than arable land, organic matter contents of other cropping patterns were significantly higher than arable land except pepper, and organic matter contents,of bamboo ＋ poultry were the highest. Soil organic matter content and number of microorganism be- tween any two different planting patterns were mostly produced significant differences in the governance process even very significant difference. Total number of microorganism also showed a downward trend with decline in the organic matter con- tent through analysis of change between soil organic matter content and microbial quantity of different planting patterns. Shown by calculating that organic matter content was negatively correlated with bacterial, fungal, with correlation coefficientsas -0.301, -0.101, while positively correlated with actinomycetes and total number of microorganisms, with correlation coeffi- cients as 0.795, 0.141. As samples collected in late winter and early spring, although organic matter content was at its peak, but due to low temperature and dry natural factors, was not conducive to bacterial and fungal growth and reproduction, and both the numbers were low. Even if actinomycetes was growing in winter, but the proportion of bacteria was the largest and had-an absolute advantage in microbial community, changes in total numbe