北亚热带高山地区椿树种和种源早期选择

Early Selection of Species and Provenances for Chinese Toona at High Mountain Region in Northern Subtropics

[目的]研究北亚热带高山地区椿树种和种源的保存率和生长性状,揭示椿树的适应性和生长性状变异规律。[方法]运用方差、相关统计分析方法,研究了营造6年生(苗龄2年)的椿树2个种33个种源成活率及生长量。[结果]椿树种源间成活率以及生长量均有较大差异,香椿生长明显优于毛红椿;初步筛选出适宜在北亚热带推广应用的3个优良香椿种源和1个优良毛红椿种源。3个香椿优良种源平均成活率比所有种源平均值提高15.5%,6年生平均树高和胸径分别比所有种源平均值提高23.5%和33.3%;6年生平均树高和胸径比本地种源平均值增长100%和16.1%。[结论]该研究可为椿树造林生产管理和规模发展提供理论依据。

[Objective]To study the preservation and growth traits of species and provenances for Chinese Toona at High Mountain Region in Northern Subtropics,and reveal the adaptability and variation of growth traits of Chinese Toona. [ Method ] Using ANOVA, statisitical analysis method,the survival rate and growth of 6 years old Chinese Toona, kinds of 33 provenanees were studied. [ Result] The results showed that the provenance survival rate and the growth amount had great differences between 32 provenances. Trees of T. sinensis growed obviously better than these of T. ciliata vat. pubescens. Three and one superior provenances of T. sinensis and T. ciliata vat. pubescens were selected, respectively. The average survival rate of three superior provenances for T. sinensis had 15.5% increase over average of all provenances. Compared with the provenance overall average,average height and DBH of six-years-old three superior provenances were increased respectively 23.5% and 33.3%. And compared with the local provenance,average height and DBH of six-years-old three superior provenances were increased respectively 100% and 16. 1%. [ Conclusion] The study can provide theoretical basis for the development of production management and the scale development for Chinese Toona.