2种彩叶植物光合特性的研究

目的]揭示2种彩叶植物光合作用的基本生理生态特征和规律，以科学指导植物造景中彩叶植物的配置。方法]以3年生红花檀木与黄叶假连翘健壮植株各4株为试材，选取每株中部外围功能叶5片，应用美国LI—COR公司生产的LI-6400便携式光合测定系统，测定了2种彩叶植物的光合特性。结果]红花檀木与黄叶假连翘的光补偿点分别为17．53和17．55μmol／（m^2·s），光饱和点分别为1000和2000μmol／（m^2·s）；红花檀木的光合日变化呈双峰曲线，黄叶假连翘的光合日变化呈单峰曲线；黄叶假连翘的水分利用率超过红花檀木。结论]2种植物对光的适应能力很强，红花檀木光补偿点较黄叶假连翘小，其耐阴性更强，固此在园林复层配置时可将其置于下层。

Studies on the Photosynthetic Characteristics of 2 Kinds of Colorful Plants

Objective] The study aimed to open out the basic physiological ecology characteristics and law of the photosynthesis in 2 kinds of colorful plants.Method] With each 4 health plants of 3-year-old Loropetalum chinense var.rubrum and Duranta repens cv.'Dwarf Yellow' as the tested materials,5 functional leaves in middle periphery of each plants were selected to determine the photosynthetic characteristics 2 kinds of colorful plants by using USA LICOR-6400 portable photosynthesis system.Result] The light comp...