芬兰的造林事业,在最近几年来发展很快,对种苗的需要量也不断增长。1956年造林2万5千公顷,用种子3万公斤。今后数十年,人工更新的森林面积将要达到280万公顷。芬兰在1947年成立了林木繁殖委员会,其目的是将林木繁殖的科学研究成果应用到造林上去。其任务之一县选择与记载优良生态型植株作为繁殖的原始材料.经对全国森林进行调查后,选择了1700株杂交植株。这个数量足以满 Finnish afforestation has developed rapidly in recent years and the demand for seedlings has also been on the rise. 1956 Afforestation 25,000 hectares, with seeds 30,000 kg. In the decades to come, artificially renewed forests will have to reach 2.8 million hectares. Finland established the Tree Breeding Committee in 1947 with the aim of applying the scientific findings of tree breeding to afforestation. One of its tasks is to select and record excellent eco-friendly plants as raw materials for breeding. After surveying the national forest, 1700 hybrid plants were selected. This amount is sufficient