泡桐无性系苗期生长动态分析研究

根据群体遗传结构模式，将毛泡桐＊白花泡桐和毛泡桐＊兰泡桐Ｆ１无性系的年生长进程划分为早中后期。通过用Ｌｏｇｉｓｔｉｃ曲线对各无性系的年生长的模拟，估测了各无性系生长速率的最大点和速生期天数。根据速生期对早中后３个时期的覆程度，对不同无性系的生长形式作了分析。以正交多项式模拟生长曲线，检验了苗高，地径增长曲线的差异显著性，结果显示，无性系间苗高，地径生长曲线在阶段上存在显著差异。

Dynamic analysis of the growth during nursery of paulownia clones

On the basis of variation patterns of genetic structure of paulownia,the annual growth process was classed into early,intermediate and later three periods in paulownia fortunei tomentosa ×paulownia fortunei F1 clones and p aulownia fortunei tomentosa×paulowmia fortunei elongata F1 clones.The propert ies of annual growth of various clones were stimulated by logistic curve,and the maximum points of growth rate per day and the lengths of fast-growing stage wer e also estimated.on the basis of the degrees in which the early,intermediate and later three periods were covered by the fast-growing stages,the growth patterns of different clones were analysed.The clonal growth curves were approached by c ross cut polynomiad and the coefficients β0,β1,β2 which made up the growth curves were tested.The results indicated that the differences of the grow th curves of hight and diameter were significant only in stage.