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我场现有油松人工林1.9万亩,其中0.668万亩已进行了抚育间伐。从现有的油松人工林来看,林龄参差不齐,最大的22年,最小的3年。按林分龄组划分,可分为幼龄林和中龄林两类。前者1.432万亩,占总面积的75%;后者0.468万亩,占总面积的25%。从生长状况来看,98%以上的油松人工林生长良好,植株健壮,林地卫生条件较好,从未发生过0.1公顷以上的大面积病虫害,其中1.1万亩已郁闭成林。根据1957年国家颁布的“森林抚育采伐规程”中的各项规定,我场对油松人工林,
I field existing pine plantation 1.9 million mu, of which 0.668 million mu have been tending thinning. From the existing Pinus tabulaeformis plantation, uneven age, the largest 22 years, the youngest 3 years. By forest age group divided into two categories: young and middle-aged forest. The former is 1.432 million mu, accounting for 75% of the total area; the latter is 0.468 million mu, accounting for 25% of the total area. From the growth point of view, more than 98% of the Pinus tabulaeformis plantation grow well, plant robust, better woodland health conditions, has never occurred in more than 0.1 hectares of large area pests and diseases, of which 1.1 million mu have closed forest. According to the regulations promulgated by the State in 1957, “Forestry Tending and Cutting Regulations” in the provisions of my field of Pinus tabulaeformis plantation,