南方红豆杉幼林生长种源变异和速生种源初选

Young Growth Variation and Selection of Fast-growing Taxus chinensis var. mairei Provenances

为了解南方红豆杉幼林生长和分枝性状的种源差异和地理变异情况,对24个产地的南方红豆杉2年生圃地种源进行了检测,结果表明,南方红豆杉幼林树高、当年抽梢长、地径、冠幅、最长侧枝长、当年侧枝数和侧枝总数等在种源间存在显著差异,不存在明显的地理变异模式;来自气候温暖但年降水量较少地区的种源生长快、分枝多、树冠浓密。相关分析表明,种源生长和分枝性状间呈显著的正相关,速生的种源冠宽、枝多。基于种源幼林测定结果,初选出云南石屏、福建沙县、湖南通道、福建武夷山和贵州锦屏5个早期速生优良种源。

Investigations were made on height, shoot length at current year, basal diameter, crown width, length and number of branches of 2-year Taxus chinensis vat. rnairei of 24 provenances planted in nursery at Longquan, Zhejiang province. The results indicated that the above-mentioned indicators had significant differences among provenances, but no obvious geographic variation pattern. It was found that provenances from warmer areas but less precipitation had characters like faster growth, more branches and thicker crown. Correlation analysis on properties showed that seedling growth had positive correlation with branch one, that was fast growing provenance had wider crown and more branches. Based on the result from the experiment, 5 provenances were recommended for fast growing, including Shiping of Yunnan, Shaxian of Fujian, Tongdao of Hunan, Wuyishan of Fujian, Jinping of Guizhou.