基于Richards函数的泡桐无性系年生长节律

Growth Rhythm of Paulownia Clones Based on Richards Function Curve

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 19 Paulownina 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-growingperiod 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 nosignificant difference with that of the control. The fast-growing period of ground diameter began late but lasted shortly and small increment. Clusteranalysis 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 weresimilar with the control.