毛红椿播种苗苗期生长规律分析

Study on seedling growth rhythm of Toona ciliate var.pubescens

在定期观测的基础上,对不同种源苗木生长量进行方差分析和苗高生长节律对比分析;采用回归分析的方法,拟合了毛红椿不同种源不同播种期的苗高与时间的相关关系,构建了苗木生长量的数学模型。结果表明:(1)不同种源不同播种期1年生毛红椿播种苗苗高生长高峰期均出现在7—9月,春播苗苗高大于冬播苗;(2)不同种源播种苗生长量存在显著差异,宜丰种源优于龙南种源;(3)用Logistic曲线方程对毛红椿苗木高生长过程进行模拟,模型参数R2为0.950～0.969,表明模型拟合与实际观测值较接近,可用该模型估算1年生毛红椿播种苗在不同生长时期的高生长量。

Based on periodic observation of different provenience,the seedling growth was analyzed by ANOV and the growth rhythm of seedling height was analyzed by contrast analysis.The correlation between the height and different seeding date for different seedlings of Toona ciliate var.pubescens was fitted out.The mathematical model of seedling growth was formulated using regression analysis.The results showed：（1） The fast growth period of one-year-old Toona ciliate var.pubescens appeared from July to September.The height of spring sowing seedlings was better than winter sowing seedlings.（2） There were significant differences in seedling growth for different provenience of the seeds,that the provenance from Yifeng was much better than the other provenience.（3） The reliability of the mathematical models of the height growth was simulated with Logistic curve equation,the R2 of model parameters was from 0.950 to 0.969,which could be applied to estimate and analyze the growth rate for one-year-old seedlings of Toona ciliate var.pubescens different growing stages.