宿根花卉植物生态效益研究

Study on the Ecological Benefits of the Plants of 6 Species of Perennial Flowers

为综合评价宿根花卉的园林生态效益,试验以黑心菊(Rudbeckiahirta)、芙蓉葵(Hibiscus moscheutos)、蜀葵(Althaea rosea)、赛菊芋(Heliopsishelianthoides)、紫茉莉(Mirabilis jalapa)、醉鱼草(Buddlejalindleyana)等6种宿根花卉为试验材料,研究其光合有效辐射、二氧化碳的响应以及光合速率日变化。光合特性研究表明:黑心菊、赛菊芋和醉鱼草净光合速率日变化表现为单峰曲线,未出现"午休"现象;芙蓉葵、蜀葵和紫茉莉为明显的双峰曲线,有明显的"午休"现象,且第二峰值出现的时间均为14时。对6种宿根花卉进行了园林应用综合等级评定。结果表明:蜀葵达到Ⅰ级标准,可直接大面积开发利用;黑心菊等达到Ⅱ级标准,在园林中可根据具体生境栽植。

The comprehensive evaluate the benefits of landscape ecology,the experiment has taken Rudbeckiahirta、Hibiscus moscheutos、Althaea rosea、Heliopsishelianthoides、Mirabilis jalapa、Buddlejalindleyana perennial flowers as experimental materials. The photosynthetically active radiation, the response of carbon dioxide and the diurnal variation of photosynthetic rate were studied. Through the study on Photosynthesis Characteristics of light show, Rudbeckiahirta, Heliopsishelianthoides and Buddlejalindleyana variation of net photosynthetic rate showed a single peak curve, not ＂break＂ phenomenon; Hibiscus moscheutos, Althaea rosea and Mirabilis jalapa showed clearly bimodal curves, which has clear ＂lunch break＂ phenomenon, and the second peak appeared in the time are 14 o＇clock. Based on the 6 kinds of wild groundcover plants for Landscape Application of comprehensive assessment, results showed that the Althaea rosea reached grade Ⅰ standard, which meant it can be developed directly to large area; Rudbeckiahirtagrade Ⅱ standard, it can be planted according to the specific habitat.