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1 商洛地区人工油松林现状目前全区有以油松为主的用材林53万ha,中幼龄林约占85%。其中人工油松中幼龄林18.6万 ha,占全区中幼龄林面积的41.29%。大面积油松林的形成,大体有4个部分:一是国营林场营造起来的油松林。本区六县一市先后办起了以造林为主的林场9个,共造油松林4.83万 ha,保存3.31万ha,已郁闭成林进入间伐抚育阶段的2.44万ha。二是集体和个人造的油松林。全区约
1 Status of Artificial Pinus tabulaeformis in Shangluo Region At present, there are 530,000 ha of timber forests dominated by pine woods and about 85% of young and middle-aged forests. Among them, 18.6 million ha were young and medium-aged artificial pine forests, accounting for 41.29% of the total area of young and middle-aged forest areas. The formation of large-scale pine forest, generally has four parts: First, the state-owned forest farm to create a pine forest. There are 9 forest farms with afforestation in the six counties and one city in the district, with a total of 48,300 ha of pine forests and 33,100 ha of haned pine forests, and 24,400 ha have been planted into the thinning and tending stage. Second, the collective and individual made of pine forest. The whole area about