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1975年,根据国家下达的任务,我们在延安地区开展了飞播造林种草试验。飞播造林作业的特点是将种子直接撒播在播区,依赖天然降水发芽出苗。如播后降水不及时,种子则易遭受地表高温和鸟兽的危害,影响出苗效果。因此,飞播后种子发芽的快慢、出苗的迟早会直接影响飞播造林成效。据国内外试验资料,用 Co~(60)γ射线处理林木种子有提高发芽和促进生长的作用。为此,我们从1976～1979年对飞播种子进行了试验,以
In 1975, according to the tasks assigned by the state, we conducted aerial seeding and afforestation trials in Yan’an. Aerial seeding afforestation is characterized by direct sowing of seeds in the broadcast area, relying on natural precipitation germination. Such as sowing after the rain is not timely, the seeds are vulnerable to surface heat and the dangers of birds and animals, affecting the emergence effect. Therefore, after sowing, the speed of seed germination, emergence sooner or later will have a direct impact on the effectiveness of aerial sowing and afforestation. According to the domestic and foreign experimental data, the treatment of tree seed with Co ~ (60) γ ray has the effect of promoting germination and promoting growth. For this reason, we conducted experiments on airborne seeds from 1976 to 1979