鲁东南滨海地区观赏草的观赏适应性评价

对日照市引种的10科20属32种观赏草的物候期、生物学特性和景观特性进行了为期1年的观测。利用层次分析法对其进行分析和评价, 并分为(Ⅰ～Ⅴ)5个等级。结果显示, Ⅰ级:花叶芦竹(Arundo donax)和矮蒲苇(Cortaderia selloana)有极高的观赏适应性价值, 完全适合在日照地区推广;Ⅱ级:芒类、狼尾草类、再力花(Thalia dealbata)等17种材料, 有较好的观赏适应性, 可以在日照地区推广;Ⅲ级:水葱(Scirpus validus)、鸢尾(Iris tectorum)等8种材料, 各项指标的得分都很高, 但花序不明显、观赏价值较小或花期短, 可以推广;Ⅳ级:苔草(Carex tristachya)、拂子茅(Calamagrostis epigejos)和灯芯草(Juncus effusus)3种观赏草的引种较少, 需要先适量种植, 再进一步评价;Ⅴ级:麦冬(Ophiopogon japonicus)和沿阶草(O.bodiniert), 不适宜做观赏植物, 建议做地被植物。

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.