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一、选用优良种子。据试验证明,Ⅰ级种子飞播成效是Ⅱ级种子的2倍;Ⅲ级以下的种子用于飞播,严重影响飞播成苗效果。因此飞播造林必须选用新鲜饱满、充分成熟、发芽率高的Ⅰ、Ⅱ级种子,Ⅲ级种子不准上机。并且经过筛选和种子检验,净度、发芽率、千粒重均符合技术规程要求。若任务大、雨量偏少,种子供不应求,可将任务结转下年,决不能用劣质种子滥竽充数去搞飞播造林。二、合理选择播区。选择播区要按照飞播造林《细则》规定要求,提前组织专业队伍,对播区内的土壤植被、阴阳坡比例及社会经济条件等进行全面调查。播区面积要因地制宜,宜大则大,宜小则小。条件复杂的地区要相应的多选些小播区,组成小播区群。阴阳坡比例都要达到《细则》要求。实践证明,凡是按《细则》要求,选择在阴坡、半阴坡面积比例较
First, the selection of good seeds. According to the test, the grade Ⅰ seeds are 2 times as effective as the grade Ⅱ seeds. The seeds below the grade Ⅲ are used for aerial seeding, which seriously affects the effect of aerial seeding. Therefore, aerial seeding afforestation must use fresh full, fully mature, high germination rate Ⅰ, Ⅱ seeds, Ⅲ grade seeds are not allowed on the machine. And after screening and seed testing, clarity, germination rate, grain weight are in line with the technical requirements. If the task is large, the rainfall is too small, the seeds are in short supply, the task can be carried over to the next year, and no inferior seed should be used to engage in aerial sowing and afforestation. Second, a reasonable choice of broadcast area. In accordance with the requirements of the “rules and regulations” for aerial seeding and afforestation, the selection of seeding areas should be organized in advance to conduct a thorough investigation of the soil vegetation, proportions of yin-yang slopes and socio-economic conditions in the seeding area. Broadcast area should be adapted to local conditions, should be large, should be small. The conditions of the complex area to the corresponding multiple broadcast area, composed of a small broadcast area group. Both yin and yang slope must meet the “rules” requirements. Practice has proved that those who “rule” requirements, choose the shady, half shady area ratio