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四川西部高山地区地域辽阔,森林资源丰富,是我省主要林业生产基地.但由于长期的过量采伐,森林资源的消耗量大大超过生长量,有些地区的森林资源因急剧减少而近于枯竭.生态环境日益恶化,高山森林的上限下降,下限上升,干旱河谷不断扩展,严重影响着川西的经济发展和群众的生产生活.为了加快植被恢复步伐,协调生态平衡,在省林业厅的统一部署下,由省营林调查队、阿坝州林业局及茂汶、红原、黑水、松潘等县林业局联合组成的四川西部高山飞播试验组,从1986年开始,对川西的飞播树种、播种期等因子进行了连继的试验研究.试验选用了云杉、冷杉、桦木、落叶松及油松等树种.可是,这些树种多数是体积小,质量轻的小粒种子,不利于空中飞播作业,为了克服这一障碍,提高小粒种子飞
The mountainous area in the western part of Sichuan Province has a vast territory and abundant forest resources, and is a major forestry production base in our province, but due to the long-term over-harvesting, the consumption of forest resources greatly exceeds the growth and the forest resources in some areas are nearly depleted due to the drastic reduction. The environment is deteriorating, the upper limit of alpine forests is declining, the lower limit is rising, and the arid valleys are expanding continuously, seriously affecting the economic development and the masses’ production and life in western Sichuan.In order to accelerate the pace of vegetation restoration and coordinate the ecological balance, under the unified deployment of the Provincial Forestry Department, The experimental group of alpine fly sowing in western Sichuan, jointly composed of the Provincial Forestry Investigation Team, Aba Prefecture Forestry Bureau, and the Maowen, Hongyuan, Heishui and Songpan County Forestry Bureau, started to study the seeding and sowing dates, etc. in western Sichuan since 1986 Factors such as spruce, fir, birch, larch and pine etc. However, most of these species are small size and light weight of small seeds, which is not conducive to airborne operations, in order to overcome This obstacle increases the flying of small seeds