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研究了红锥天然分布区各种源的主要特性,从总体看可划分为3大类,来自水热充沛地区的种源(21.1℃)具有嫁接植株生长快、形成花蕾和开花时间较早,展枝展叶早,叶片短小、枝叶数量多等特性;来自年均温低或较低(<19.9℃)的其余两类种源则嫁接植株生长较慢,物候较迟,叶片较宽大。从全分布区嫁接植株的生长变异看,其变异属随机变异,天然分布中种源的生长变异大于种源内的单株变异,种源选择基础上进一步进行单株选择是一种理想的生长改良途径。
The main characteristics of various sources of the natural distribution of red cone were studied. Generally speaking, the provenances (21.1 ℃), which can be divided into three categories, with abundant sources of water and heat, had the characteristics of rapid growth of grafted plants, formation of flower buds and earlier flowering time, The branches were planted in the early leaves, the leaves were short, and the number of branches and leaves were large. The other two kinds of provenances from the average or lower temperature (<19.9 ℃), the grafted plants grew slower, the phenology later and the leaves wider. From the perspective of growth variation of grafted plants in the whole distribution area, the variation is a random variation. The growth variation of provenances in the natural distribution is greater than that in the provenances. Further selection of individual plants on the basis of provenance selection is an ideal growth improvement way.