摘要
用Logistic曲线模拟泡桐19个无性系苗期的年生长动态,估测了它们日生长速率的最大点和速生期的两个拐点及长度。用正交多项式逼近无性系的增长曲线,对组成曲线的回归系数β_0、β_1和β_2进行了多元方差检验,差异显著。泡桐无性系年生长进程可分为早、中、后三个时期。
The properties of annual growth of Paulownia clones were simulated by Logistic curve, and the maximum points of growth rate per day and durations of fast-growing stage were estimated. The clonal growth curves were approached by cross cut polynomiad and the coefficients B0, B1 and B2 which made up the growth curves were tested. The results show that the differences of growth curves are significant. The annual growth process of Paulownia clones was classed into early, intermediate and later three periods.
出处
《林业科学研究》
CSCD
北大核心
1993年第1期39-45,共7页
Forest Research
关键词
泡桐
无性系
苗期
生长
分析
Paulownia clones, Logistic curve, fast-growing point, fast- growing stage
