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华北落叶松是我省主要用材树种之一,具有速生、丰产、优质、抗性强等特点。但由于其种子颗粒小,顶土力弱,播种育苗比较困难。目前不少地区和单位育苗技术尚未完全过关,为了取得育苗的成功,用加大播种量的方法,提高幼苗出土率,增加苗木株数。用种量有的每亩多达30多斤。而随之出现了育苗成本过高,苗木过稠,影响苗木健康生长,苗木质量降低,造林成活率不高。针对这种情况,我们于1981年～1982年进行了落叶松育苗播种量试验。试图确定适宜的播种量,降低育苗成本,提高苗木质量。
Larix principis-rupprechtii is one of the main timber species in our province, with the characteristics of fast growing, high yield, high quality and strong resistance. However, due to its small seed particles, top soil weak, more difficult to sow seedlings. At present, many areas and units of seedling technology has not yet been fully passed, in order to obtain the success of nursery, with increased sowing methods to increase the rate of seedlings and increase the number of seedlings. Some species used up to 30 kilos per acre. The attendant emergence of high cost of nursery stock, too thick seedlings, affecting the healthy growth of nursery stock, seedling quality, afforestation survival rate is not high. In view of this situation, we carried out larch seedling seeding rate test from 1981 to 1982. Trying to determine the appropriate sowing, reduce seedling costs, improve seedling quality.