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

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 comprehensive 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 Island, especially in hillside grassland and prairie shrubland, where they accounted for 55.84%. The species’ resistance was strong; in total resistance indices, desiccation-tolerant species accounted for 45.45%, water-resistant 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 evaluation 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 correlation 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, Lilium brownie and Ophiopogon intermedius, which could be used for landscaping directly.