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25～ 35年生兴安落叶松母树林丰产结构是密度为 30 0株 /hm2 ,Ⅰ级木占 75%、Ⅱ级木占 2 5%;偏雌、中间型、偏雄母树比例为 6∶0∶4,其球果产量为 2 0 3kg/hm2 ,种子品质也较好 .在促进开花结实措施中 ,以环状砍皮方法效果较好 ,结实率为 90 %、单株产量提高 60 %;施肥中磷肥的效果显著 ,其施肥量为 60 g/m2 .
25 ~ 35-year-old Larix gmelinii rich tree structure is the density of 30 0 plants / hm2, Ⅰ grade wood accounted for 75%, Ⅱ grade wood accounted for 25%; partial estrus, intermediate, partial male tree ratio 6:0: 4, the coniferous fruit yield was 230kg / hm2, and the seed quality was also good.While promoting the flowering and fruiting measures, the method of ring cutting was better, the seed setting rate was 90% and the yield per plant increased by 60% The effect of phosphate fertilizer is significant, the amount of fertilizer is 60 g / m2.