2种彩叶植物光合特性的研究  

Studies on the Photosynthetic Characteristics of 2 Kinds of Colorful Plants

作　　者：王立新[1] 田丽[1] 

机构地区：[1]西昌学院,四川西昌615000

出　　处：《安徽农业科学》2010年第2期715-717,共3页Journal of Anhui Agricultural Sciences

摘　　要：[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年生红花檵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]红花檵木与黄叶假连翘的光补偿点分别为17.53和17.55μmol/(m2.s),光饱和点分别为1 000和2 000μmol/(m2.s);红花檵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檵木。[结论]2种植物对光的适应能力很强,红花檵木光补偿点较黄叶假连翘小,其耐阴性更强,因此在园林复层配置时可将其置于下层。[ 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 compensation points of Loropetalum chirtense and Duranta repens were 17.53 and 17.55μmol/（m2 ·s） resp. and their light saturation point were 1 000 and 2 000 μmol/（m2·s） resp. The day variety of net photosynthetic rate of Loropetalum chinense was a bimodal curve and that of Duranta repens was a single peak curve. Water utilization of Duranta repens was better than that of Loropetalum chinense. [ Conclusion ] Two kinds of colorful plants had the good adaptation ability to sunshine. Loropetalum chinense had slightly smaller light compensation points and stronger shade tolerance than Duranta repens, so it should be allocated on the lower layer in the compound layer configuration of landscape.

关 键 词：红花檵木 黄叶假连翘 光合特性 净光合速率 

分 类 号：S682.36[农业科学—观赏园艺]