6种园林彩叶植物的耐盐性评价

Evaluation on Salt Tolerance of Six Color-leafed Garden Plants

为沿海地区种植耐盐园林彩叶树种提供依据与选择,丰富沿海高盐土壤地区园林植物品种,选用五彩络石、红叶石楠、金边黄杨、迎春、大花六道木和亮丽忍冬6种园林绿化常用彩叶植物,设置6个盐浓度盆土栽培处理,研究盐胁迫植株存活率、相对高度生长及抗氧化酶（SOD、POD）活力的变化。结果表明：在0.05%~0.75%土壤盐浓度条件下,随着盐胁迫浓度升高,各品种均表现出存活率和相对高度生长下降、SOD活力均呈上升趋势,在0.3%盐浓度时POD酶活力达最高,随后呈下降趋势。综合比较,6种园林彩叶植物耐盐能力依次为亮丽忍冬〉迎春、红叶石楠〉金边黄杨、五彩络石〉大花六道木。

In order to provide basis and selection of salt-tolerant color-leafed garden tree species in coastal region,enrich garden plant species in high-salt coastal region,six color-leafed garden plants,Trachelospermu jasminoides,Photinia fraseri,Euonymus japonicas,Jasminum nudiflorum,Abelia grandiflora and Lonicera nitida,were employed to set six treatments with various salt concentrations,so as to study on the variation of plant survival rate,relative growth in height and activities of SOD and POD.Results：Survival rate and relative growth in height of all the cultivars declined with salt concentration increasing in the range of 0.05%~0.75%.SOD activity showed an increasing trend.POD activity reached the peak when the salt concentration was 0.3%,and then declined with salt concentration increasing.According to the results,the sequence of salt tolerance of the six plants was L.nitida〉J.nudiflorum,P.fraseri〉E.japonicas,T.jasminoides〉Abelia×grandiflora.