温带地区4种园林灌木叶片的生长规律

The growth regulation on leaves of four garden shrubs in temperate region in China

以榆叶梅、紫丁香、黄刺梅和胡枝子4种常见园林灌木为研究对象,通过对其成株与幼株叶片的宽度和长度的大样本测量,分析了叶片的生长规律.结果表明,4种园林灌木的叶片生长规律均可由多种函数形式较好地表达出来,如果以相关性最好的拟合方程作为其定量刻画模型,紫丁香、黄刺梅、胡枝子成株和幼株及榆叶梅成株的叶片均呈异速生长规律,榆叶梅幼株叶片则呈同速生长规律.不同植物叶片生长规律及变化速率既有种间差异,也与生长期有关.

Prunus triloba, Syringa oblata, Rosa xanthina and Lespedeza bicolor are familiar garden shrubs. According to the measurement of the breadth and length of leaves, including adult and young plants, the growth regulation of leaves was analyzed in the large sample. The results showed that the growth regulation of leaves could be described preferably by many functions. But if the quantitative model of the growth regulation of leaves was represented by the best correlation simulated equation, then it showed the regulation of allometry on leaves of adult and young plants of S. oblata, R. xanthina, and L. bicolor and adult plants of P. triloba, and the regulation of isogony on leaves of young plants of P. triloba. Furthermore, it declared that the growth regulation and the velocity of variation were not only relative to the differences of species but also to the variances of growing seasons.