油松地理变异及种源选择的研究

本文对油松两批种源(共36个)在甘肃四个试验点的生长等性状进行了观测研究。所得的资料进行单点、多点方差分析和相关分析。结果表明:种源间差异极显著,种源与立地存在一定的交互作用,种源生长与年龄呈极显著正相关,油松地理变异趋向于不连续变异的格局。经17个变量的主分量分析和各种源生态价、生产力的计算,将参试油松种源分成速生型、中生型和慢生型三类。分布在陕西、河南一带的种源适应性强,生长速度快;分布在边缘地带的种源,普遍生长缓慢。并综合选择出一批适合甘肃不同气候类型的优良种源。

Geographic Variation and Provenance Selection of Pinus tabulaeformis

The provenance test of Pinus tabulaeformis, including 36 seed sources, was conducted in 4 locations in Gansu Province. The results show that there are significant differences in growth among the provenances and the interactions between provenances and sites are also significant. Based on the growth performance, the provenances of Pinus tabulaeformis are divided into three growth-types, e.g. fastgrowing type, middle-growing type, low-growing type. The provenances from Shanxi and Henan Province are suitable because of their fastgrowth and stable performance. The provenances from the border of the distribution of Pinus tabulaeformis have unstable performance and lowgrowth.