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我省除西北部外,其余均属亚热带地区,气候温和湿润,雨量充沛。全省除威宁和南、北盘江,红水河干热河谷外(解放后也有引种),其余各地均有杉木分布。由于我省自然条件复杂,杉木的生态特性对环境要求较严,各地宜杉程度及生产力差异很大。其中以黔东南清水江、都柳江流域各县分布最为集中,面积、数量、质量为全省之冠,其生产力很高,是我省杉木的主产区;其次是赤水河流域的赤水、习水一带;北部务川、道真及东北部松桃等县有一定数量分布;其余中部、西部、南部地区则分布零星,生产力不如前者。为合理布局我省杉木生产,必须作好杉木产区区划。而杉木气候类型的划分则是区划的主要基础。
In addition to the northwest of our province, the rest are subtropical regions, mild climate, abundant rainfall. The province except Weining and the South, North Pan River, the Red River dry and hot valley (also introduced after the liberation), the remaining parts are fir distribution. Due to the complicated natural conditions in our province, the ecological characteristics of the fir are more stringent on the environment, and the degree and productivity of cedar are quite different. Among them, the counties in Qingliang River and Duliowanjiang River in Qiandongnan are the most concentrated, the area, quantity and quality are the highest in the whole province, and their productivity is high, which is the main producing area of Cunninghamia lanceolata in our province. Chishui, Xi Water area; northern Wuchuan, Daozhen and northeast Songtao counties have a certain number of distribution; the rest of the central, western and southern regions are sporadic, productivity is not as good as the former. In order to rationally layout the production of fir in our province, we must make the division of fir-producing areas. The division of climatic types of fir is the main basis for zoning.