3种藤本地被植物抗旱性比较

Comparative Study of Drought-resistance on Three Kinds Vine of Ground Cover Plants

在城市植被护坡绿化中,筛选适宜的耐旱地被植物已变得至关重要。针对此现象,通过实地对比试验及生理指标分析评判,研究了不同程度干旱胁迫下金银花、地瓜藤、洋常春藤等3种常绿藤本地被植物的抗旱性,为城市节水耐旱绿化提供科学依据和园林绿化资源。分析结果表明:水分胁迫后,3种藤本植物形态、生理特性发生明显变化。其中,叶片的质膜透性均有上升,金银花增幅最小;过氧化物酶(POD)先略上升后下降,且金银花、地瓜藤维持较高活性。调节物质脯氨酸、可溶性糖含量增加,金银花的含量增幅最大。利用模糊数学隶属函数综合分析,得出抗旱性强弱顺序:金银花>地瓜藤>洋常春藤。

In urban slope greening, the selection of suitable drought-tolerant ground cover plants is increasingly critical. Regarding to this phenomenon, through field comparative experiments and analysis of physiological evaluation, the author studied drought-resistance on three kind＇ s vine of evergreen ground cover plants under different drought stresses： Lonicera japonica, Ficus tikoua and Hedea helix. It might provide a scientific basis and landscaping resources for urban water conservation. The results showed that the drought stress treatment could increase membrane permeability of leaf cells. And Lonicera japonica had the smallest increace. The activities of POD increased first and then declined, which in Lonicera japonica and Fieus tikoua were relatively high. The content of praline, soluble sugar in the leaves of three evergreen lianas increased, and also Lonicera japonica had the most. Finally, it was concluded that the drought-resistant ability of three tested species decreased in the following order： Lonicera japonica, Ficus tikoua, Hedea helix by a comprehensive analysis of fuzzy membership functions.