甘肃省早在五十年代末,六十年代初期,就在陇南、陇中天然林区的荒山、河西沙区和中部干旱山区进行过飞机播种造林种草试验,由于技术和管理方面的一些问题没有解决,绝大部分没有成林成草,归于失败。一九七九年以来,又先后在陇南、陇东分别飞播油松、云杉、漆树,华山松,侧柏等计38.2万亩。为了检查其经济效益,总结 As early as the late 1950s and early 1960s, Gansu Province conducted seeding and planting trials in the barren hills, Hexi sandy areas and central arid mountainous areas of Longnan and Longzhong natural forest areas. Due to technical and management problems Did not solve, most did not become a success, attributed to failure. Since 1979, it has also successively planted 382,000 mu of pine, spruce, lacquer tree, Huashan pine and arborvitae in Longnan and Longdong respectively. In order to check its economic benefits, concluded