【摘要】 对16 个马尾松种源进行育苗及造林试验,初期结果表明各种源在树高、地径和冠幅生长等性状上存在显著差异。用10 个不同数学模型,拟合16 个马尾松种源在纬度和经度上的一维和二维地理变异规律,马尾松种源树高、地径和冠幅生长与纬度呈现显著的变异,与经度的关系不明显。且二次数学模型比一次数学模型拟合效果更优,是模拟马尾松地理变异的理想模式。更多还原

【Abstract】 provenances of Pinus massoniana were introduced and tested in the nursery and fields in Jianyang city. The results showed that there were significant difference in growth of tree height, diameter at ground and crown breadth. The models of one dimensional geographic variation and two dimensional geographic variation on the north latitude or the east longitude for provenance of Pinus massoniana were fitted in with 10 mathematical models. The results showed that 3 characters, including tree height, diameter at ground and crown breadth, were of variation in graduated cline with latitude, but they were not quite related to longitude. And models simulating with two dimensions were better than those with one dimensions, which was a satisfactory model to fit the tendency of geographic variation on the provenance of Pinus massoniana.更多还原