一、飞机播种造林概况涞源县山场辽阔,人口较少,经济基础薄弱,荒山绿化速度落后于生产发展和人民生活的需要。为了改变这一状况,于1975年开始采用飞机播种造林,飞播面积逐年增加,截止1978年,全县飞播达297757亩。飞播的树种主要是油松,同时进行了洋槐、桦树、漆树、臭椿、榆树与油松的混播试验。 First, the overview of aircraft sowing Afforestation Ridge County Ridge is vast, less populous, weak economic base, afforestation speed lags behind production and development and people’s lives. In order to change this situation, the planted afforestation of aircraft began in 1975, with the area of ​​aerial seeding increasing year by year. By 1978, the total number of aerial seeding stations in the county reached 297,757 mu. The main species of aerial seeding is Pinus tabulaeformis, and the mixed sowing experiments of acacia, birch, sumac, Ailanthus altissima and Pinus tabulaeformis were carried out at the same time.