平潭岛野生观赏草资源的评价及开发应用

Evaluation and exploitation of resources of wild ornamental grass in Pingtan Island

观赏草因具有优良的生态性和特有的观赏性,近年来成为重要的园林绿化材料。本研究通过对平潭岛野生观赏草的调查,采用灰色关联度分析法对其进行综合评价。结果表明,1)平潭岛观赏草隶属于5科50属77种。2)生态适应性广,原生境以山坡草地及疏林灌木为主,占总数55.84%;抗性强,耐干旱占总数45.45%、耐水湿占总数31.17%、部分耐盐碱及抗风;观赏价值高,评价得分均≥2。3)参评的77种观赏草中与理想种的关联度≥0.6有66种,均有开发利用潜力;与理想种的关联度≥0.7有19种,均具有较高的观赏性和适应性;与理想种关联度≥0.8有5种,分别是芒(Miscanthus sinensis)、五节芒(Miscanthus floridulus)、甜根子草(Saccharum spontaneum)、野百合(Lilium brownii)和间型沿阶草(Ophiopogon intermedius),可考虑直接用于园林绿化。

Ornamental grass, because of itsexcellent ecological and ornamental values, has become an important landscaping material in recent years. In this study, Greycorrelation analysis was used to evaluate the compre- hensive value of wild ornamental grass in Pingtan Island. The results were as follows. 1） There were 77 species in total, belonging to 49 genera and five families. 2） Theseornamental grasseswere widespread in Pingtan Is- land, especially in hillside grassland and prairie shrubland, where they accounted for 55.84%. The species＇ re- sistance was strong＇ in total resistance indices, desiccation-tolerant species accounted for 45.45 %, water-resist- ant species accounted for 31.17%, while the rest consisted ofsaline tolerance and wind-resistant. Meanwhile, these ornamental grasses possessed a higher ornamental value （evaluation score≥2.3）. The comprehensive e valuation results showed that the degree of correlation with theideal species,in 66 of the 77 ornamental grasses, was higher than 0.6, which shows potential for development and utilization. 19 species showed a degree of cor- relation with theideal species higher than 0.7, which had higher ornamental value and adaptability. Moreover,five species showed a degree of correlation with the ideal species higher than 0.8, such as Miscanthus sinensis, Miscanthusfloridulus, Saccharum spontaneum, Liliurn brownie and Ophiopogon intermedius, which could be used for landscaping directly.