新疆落叶松种子园1976年嫁接配置的34个无性系,多数嫁接后6—7年开花,少数嫁接后3年即开花。其花芽于头年7月上旬形成,翌年4月中下旬开始形态分化,5月上旬进入初花期,5月中旬为盛花期,6月上旬幼果形成。多数无性系进入开花年龄有先雌现象。单株树冠上部花芽较下部花芽、阳面花芽较阴面花芽早开花;上部多为雌花而下部多为雄花,但雌花可授期长于雄花散粉期。少量开花的树雌花多于雄花,大量开花的树则相反。方差分析表明,无性系间雄花散粉期差异显著,雌花可授期差异不显著。聚类分析结果,34个无性系中有7个花期较早,为早花类型,其余为晚花类型,但各年花期早晚和长短受4月份的气温和降水影响较大。多数无性系雌花可授期与雄花散粉期重叠良好。 Larch plantation in Xinjiang in 1976 grafted 34 clones, the majority of 6-7 years after grafting flowering, a few grafted 3 years after flowering. The flower buds formed in the first year in early July, and began morphological differentiation in the middle and late April of the next year. The first flowering began in early May, and the flowering stage was in mid-May and the young fruit formed in early June. Most clones into the flowering age of the first female phenomenon. The flower buds of the upper canopy of the individual plant were earlier than the flower buds of the lower part, while the flower buds of the frontal surface flowered earlier than the flower buds of the negative side. The upper part was mostly female flowers and the lower part was mostly male ones. A small number of flowering trees have more female flowers than male flowers, while blooming trees have the opposite. Analysis of variance showed that there was significant difference between male and female flowers in clonal propagation stage, but no significant difference in female flowers. Cluster analysis showed that 7 out of 34 clones were early flowering and the others were late flowering types. However, the early and late flowering period and the length of each flowering period were greatly influenced by the temperature and precipitation in April. Most clones of female flowers can be granted period and male flowers scattered period overlap well.