华山松是贵州省西部地区主要造林树种之一。根据1974—75年森林资源清查结果,毕节地区九个县计有华山松林地19,181公顷(即28万7千7百余亩)其中90％以上均属中、幼龄林。因此,黔西地区各国营林场和社队林场,自70年代中期以来,抚育间伐工作是营林工作中的主要任务。但是,在间伐中如何确定保留株数,一般都缺乏经验。 Huashan pine is one of the main afforestation species in the western region of Guizhou Province. According to the inventory results of forest resources in 1974-75, 19,181 hectares (or 287,700 acres) of Huashan pine forests were counted in nine counties in Bijie Prefecture, of which over 90% were middle and young-aged forests. Therefore, the forest farms and the social forestry farms in various countries in Qianxi Prefecture have been the major tasks in silviculture since the mid-1970s. However, there is generally a lack of experience on how to determine the number of stocks retained during thinning.