日本落叶松×长白落叶松杂种幼林生长节律

摘要

对造林后2、3年生57个日本落叶松×长白落叶松杂种无性系的物候性状和生长节律进行定株观察。物候期变异分析结果表明，各物候因子在无性系水平上的分化较明显。利用方差分析方法研究不同时期无性系间树高的变异，利用秩次相关方法确定不同时期树高生长量之间的关系。结果表明：不同时期测定的树高在无性系间的差异均达极显著水平；2年生杂种无性系的遗传变异系数、遗传方差占总方差百分率和无性系重复力等遗传参数，随时间的变化趋势大致可分为3个阶段，3年生杂种无性系各遗传参数随时间的变化可分为2个阶段；不同时期树高间的相关性均达极显著水平，相关系数表现出随时间的增长而持续上升的趋势；在一个年生长周期中，日本落叶松×长白落叶松杂种有2个较明显的速生期，6月初至7月中旬为第1个速生期，第2个速生期为整个8月份。%We observed and measured two and three years old phenological traits and growth rhythm after afforestation of 57 Larix kaempferi×Larix olgensis hybrid clones in Dagujia Forestry Station in Qingyuan County, Liaoning Province.The results of analysis phenological variation show that the phonological traits are distinctively differentiated among clones.We used vari-ance analysis and rank correlation analysis, respectively, to analyze variation of height among clones at different times and relationship of height between different times.The height is significantly different among clones at different times.The age trends of genetic variation coefficients , genetic variance accounting for the percent of total variance and repeatability of two years old hybrid clones for height can be divided into three stages.The age trends of genetic parameters of three years old hybrid clones for height can be divided into two stages.The height has strongly positive genetic correlations with different times, and the correlation coefficients are increased with aging.During one year growing period, the height has two obvi-ously living period, one is from early June to mid-July and the other from July 25 to August30 .