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马尾松(Pinus massoniana)是我国南方主要用材树种之一。其适应性强,生长迅速,经济价值高,资源丰富。主要分布于北纬21°51′—33°51′,东经102°30′—122°30′。汉中地区十一个县(市)都有分布,总面积约4500多公顷。为了了解马尾松种内地理种源遗传变异的幅度和型式,比较鉴定种源间以及种源内个体差异,为选择当地造林优良种源、类型及单株提供科学嵌据。我们于1983年进行了马尾松地理种源试验,对不同种源苗期和幼林各性状进行了观测研究,现将试验结果简报如下。一、试验地自然概况试验地设在城固县青龙寺林场,属汉中
Pinus massoniana is one of the main timber species in southern China. Its adaptability, rapid growth, high economic value, rich resources. They are mainly distributed at latitude 21 ° 51’-33 ° 51 ’and longitude 102 ° 30’-122 ° 30’. Eleven counties (cities) in Hanzhong area are distributed, with a total area of about 4500 hectares. In order to understand the range and type of genetic variation of geographical provenance in Pinus massoniana and to identify individual differences among provenances and provenances, a scientific embeddedness was provided for selecting superior provenances, types and individuals of afforestation. We conducted a geographic provenance test of Masson pine in 1983, and observed and studied the seedling and young forest traits of different provenances. The test results are summarized as follows. First, the experimental nature of the general test site located in Chenggu County Qinglong Temple forest, is Hanzhong