Ornamental-adaptability evaluation of ornamental grasses in Southeastern coastal region of Shandong

The adaptability of 32 ornamental grasses species belonged to 10 families and 20 genus and introduced to Rizhao were evaluated based on anniversary observation of phenological phase, biological characteristics and landscape characteristics. The results showed that the grasses were divided into five levels(Ⅰ～Ⅴ). Arundo donax and Cortaderia selloana were in grade Ⅰ which had high ornamental value in Rizhao and were perfectly suitable to Rizhao. Miscanthus sp., Pennisetum sp., Thalia dealbata and other 14 grasses were in grade Ⅱ which had ornamental value in Rizhao and can be extended in Rizhao. Scirpus validus, Iris tectorum and other 6 grasses were in grade Ⅲ which had high value of each index with unobvious inflorescence and lower ornamental value or short flowering-time and could be extended. Carex tristachya, Calamagrostis epigejos and Juncus effusus were in grade Ⅳ which did not have enough introduction and need more planting before a further evaluation. Ophiopogon japonicus and O. bodiniert were in grade Ⅴ which were not suitable for ornamental plants.