我局地处暖温带森林植物生长区,雨量充沛,湿度大,土壤肥沃。从1960年起共营造杉林4万余亩,已成林的2万余亩,一般生长良好。据观测,9.5年生的Ⅰ类林分,年增粗1.5厘米,材积年生长量2米~3/亩左右;16年生的Ⅱ类林分,材积年生长量近1米~3/亩;13-15年生Ⅲ类林分,材积年生量0.5米~3/亩。目前,迫切需要进行间伐抚育。为 Our bureau is located in warm temperate forest plant growth area, abundant rainfall, humidity, fertile soil. Since 1960, a total of more than 40,000 mu of cedar forest have been planted and more than 20,000 mu of forest have been planted, generally growing well. According to the observation, the Ⅰ type forest stands of 9.5 years old have an annual increase of 1.5 cm and an annual volume of growth of 2m ~ 3 / mu. For the 16-year-old type Ⅱ forest, the annual growth of the timber volume is nearly 1m ~ 3 / mu; - Class 15 stands of Class III stands with annual yield of 0.5 m ~ 3 / mu. At present, there is an urgent need for thinning and tending. for