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一、前言 落叶松生长快、材质好、抗性强,是我省山地造林的速生用材树种之一。目前我省营造的落叶松林主要有三个种一个变种:华北落叶松、长白落叶松、朝鲜落叶松、日本落叶松。这几个品种各有不同的特点:日本落叶松生长快,但苗期贪青、顶枝木质化晚,往往发生冻梢、换头现象,树干基部多成弯曲状;长白、朝鲜落叶松干形通直,但在幼年时期容易感染早期落叶病;华北落叶松比较耐干旱,但在辽东地区上山后生长不如其他三个树种快。 目前我省落叶松种源缺乏,种子的数量都远远满足不了林业生产日益发展的需要。
I. Introduction Larch grow fast, good material, strong resistance, is one of the fast-growing timber species afforestation in our province. At present, there are three main species of larch in our province: one species of Larix principis-rupprechtii, Larix olgensis, Korean larch, and Japanese larch. These varieties have different characteristics: Larix kaempferi grow fast, but the seedling greedy, late late lignification, tend to freeze the tip, the phenomenon of head replacement, the trunk base into a more curved; Changbai, North Korea larch dry Shaped straight, but susceptible to early deciduous disease in early childhood; Larix principis-rupprechtii more drought-resistant, but not as good as the other three species in the Liaodong uphill. At present, the lack of Larch resources in our province, the number of seeds far can not meet the growing needs of forestry production.