我局地处秦岭山区,地形变化复杂,高低差异悬殊。两河林场秦岭东梁最高海拔2964.6米,而东峪河口最低海拔仅800米,相对高差2164.6米。为了适应海拔2000米以上高寒山区造林树种的需要,扩大森林资源,我们从1973年以来在两河林场、18公里苗圃、菜子坪林场等3单位进行了云杉育苗造林试验,共计育苗12.8亩,每亩产苗20万株,3年生苗高9厘米.最高的12厘米。1976年3月,相继上山造林,1978年6月29日至7月7日采用 Our bureau is located in the Qinling Mountains, terrain changes complicated, high disparities. The highest elevation of the East Ridge Qinling Ridge 2964.6 meters, while the lowest elevation of East Valley estuary only 800 meters, the relative elevation 2164.6 meters. In order to meet the need of afforestation tree species in alpine mountainous areas above 2000 meters above sea level and expand forest resources, we have conducted spruce seedling afforestation experiments in three units of Lianghe Forest Farm, 18 km nursery and Cai Zhiping Forest Farm since 1973, with a total of 12.8 mu nursery plants, 200,000 mu of seedlings per acre, 3-year-old seedling 9 cm high, the highest 12 cm. 1976 March, one after another afforestation, June 29, 1978 to July 7 adopted