长白落叶松初级种子园去劣疏伐实验结果分析

摘要

通过无性系开花结实能力与其子代生长综合评定和分析,制定长白落叶松初级种子园去劣疏伐实验方案并进行具体实施.疏伐后第二年调查显示:种子园雌、雄花量分别比未疏伐对照提高5.5倍和1倍,种子产量提高了8.82%,种子出种率、发芽率和千粒重分别提高31.9%、2.37%和0.74g.说明适时对初级种子园采取留优去劣疏伐,可改善种子园内光照条件和基因组成,有利于花粉飞散和提高授粉率,增加母树单株结实量,可以有效地提高改善种子园良种的产量和品种.%The development of Larix olgensis primary seed orchard thinning strategies through clonal offspring growth and fruiting ability and comprehensive evaluation.Show second years after thinning survey: Seed Orchard of female and male flowers respectively than no thinning increased by 5.5 times and 1 times higher than that of the control, the seed yield increased by 8.82%, a seed rate, germination rate and grain weight were increased by 31.9%, 2.37% and 0.74g.Timely to take primary seed orchard rouging thinning, can improve the seed orchard illumination conditions and genetic components, is conducive to improve the rate of pollen dispersal and pollination, increased seed yield per plant trees, can effectively improve the seed yield and seed orchard varieties.