飞播造林的五大趋势文／刘道平１９５６年以来，全国有２６个省（区、市）的９３１个县（旗、市、区）进行飞机播种造林，作业面积达２５３３万公顷，成效面积８６７万公顷，占建国以来人工造林保存面积的四分之一，使全国森林覆盖率提高０．９个百分点。４０年来，飞播造... Five major trends in aerial seeding / Liu Daoping Since 1956, 931 counties (banners, cities and districts) of 26 provinces (autonomous regions and municipalities) nationwide have carried out sowing and planting of aircraft with a work area of ​​25.33 million hectares and an effective area of ​​8.67 million hectares , Accounting for one-fourth of the area reserved for afforestation since the founding of the People’s Republic, raising the national forest coverage rate by 0.9 percentage point. Over the past 40 years, the fly sowing ...