马尾松黄山松陈种飞播造林技术研究

浙江省以往飞机播种造林均在2～3月份进行。此段时间常因去冬新采种子来不及处理,飞机紧张,加上春季造林紧张而不能按时按计划完成飞播任务。1986年全省开始用马尾松、黄山松贮藏1a的陈种进行飞播造林。飞播后当年调查,结果马尾松陈种飞播平均出苗10500株/hm~2,5年生平均保存8850株/hm~2,黄山松陈种飞播平均出苗11145株/hm~2,5年生平均保存6570株/hm~2.均达到1990年林业部颁标准(成苗数:乔木6000株以上)。飞播成效率由原来的61.5％提高到67.0％,提高了5.5％.到目前止,全省已用马尾松、黄山松陈种飞播造林5.97万hm~2.1990年12月全省又采用马尾松、黄山松陈种首次进行冬季飞播造林,同样取得较好效果,提高了飞机利用率和飞播造林质量。

Planting by Air Seeding Using Masson's Pine and Taiwan Pine Old Seeds

The reasons why the air seeding missions sometimes were not fulfiled during springtime in Zhejiang Province were that there were not enough time to treat the cones collected in the last year, etc. Masson'S pine and Taiwan pine seeds stored for a year began to be used for air seeding in 1986. In the very year after air seeding, the results showed that the average emergence seedlings were 105 000 per hectare for masson'S pine, and 11145 per hectare for taiwan pine; and the average numbers of quinquennial trees were 8850 per hectare for masson'S pine, and 6570 per hectare for Taiwan pine, which both reached the standard made by ministry of forestry, PRC in 1990 (the number of arbors is over 6000). The effect ratio of air seeding was increased by 5.5%. Up to now, masson'S pine and Taiwan pine old seeds have been used for air seeding for 59700 hm2 all over the Zhejiang Province. Planting by air seeding in the winter was first conducted using masson'S pine and Taiwan pine old seeds in 1990, and the effect was good, and the airplan utilization ratio as well.