华南地区5种边坡绿化植物的抗旱性研究

Drought Resistance of 5 Species of Slope Greening Plants in South China

摘要:

以5种边坡绿化植物为研究对象，通过盆栽控水试验，观测其形态指标和叶片相对含水量、相对电导率、丙二醛、脯氨酸等生理生化指标含量变化，利用多指标综合评价的隶属函数值法进行抗旱性综合评价。5种植物的抗旱性表现从强到弱依次为软枝黄蝉Allamanda cathartica、长隔木Hamelia patens、粉花夹竹桃Nerium oleander ‘Nanum’、地果Ficus tikoua、冬红Holmskioldia sanguinea。建议以5种植物的抗旱性、生长特性和景观价值为依据，进行边坡绿化植物配置和养护管理。

Abstract:

This study focuses on drought resistances of 5 species of slope greening plants used in South China. The effects of water stress on physiological and biochemical indexes, such as morphological changes, leaf relative water content, relative electric conductivity, malondialdehyde content (MDA) and proline content (Pro) are investigated through water-controlled experiments. Subordinate function value method is used to evaluate drought resistances of 5 studied plants base on above measured indexes. The results show that the order of drought resistance of 5 studied plants from strong to weak is Allamanda cathartica, Hamelia patens, Nerium oleander‘Nanum’, Ficus tikoua and Holmskioldia sanguinea. Depending on research results, the study suggests that drought resistance, growth characteristics and landscape value of 5 studied plants should all be considered in plant disposition and maintenance management of slope greening.