采用Richards函数法对19个泡桐无性系的10项重要生长指标的年动态进行模拟，以优良主栽泡桐品种毛白33为对照，研究了其年生长节律。结果表明，19个无性系年生长过程均可用Richards函数曲线进行描述，不同无性系各生长参数与ck相比，参试的无性系苗高速生期开始时间较晚，但持续生长时间较长，参试无性系一年生苗高在375.06~478.10 cm，与ck差异不显著；地径速生期表现出与苗高相似的生长节律，但生长量较低，其中除无性系1、2、11、16、18和19外都比ck要低；聚类分析表明，参试材料3、4、11、12、16和18号无性系的生长特性与ck接近，而1和2号无性系苗期生长速度显著高于ck，适合参加多点区域试验。%Annual growth was simulated by Richards function curve with 10 growth indicators of 19Paulownina clones, with the cultivar ‘Maobai 33’ as the control. The results showed that the annual growth could be modeled reliably by Richards function. The height fast-growing period of Paulownia clones began late but lasted for a long time. The height of 1-year seedlings of tested clones were 375.06 - 478.10cm, and had no significant difference with that of the control. The fast-growing period of ground diameter began late but lasted shortly and small increment. Cluster analysis indicated that clone No1 and No 2 grew faster than the control, and the growth characteristics of clones No 3, 4, 11, 12, 16 and 18 were similar with the control.
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