10种观赏草在陕北地区的引种评价与分析

Evaluation and analysis of introduction of 10 ornamental grasses in northern Shaanxi

为丰富陕北地区园林绿化植物种类,利用灰色关联分析法对拟引种10种观赏草的四季适应性进行观测分析,并对其观赏价值进行系统的评价。结果表明:1)10种观赏草均可在陕北地区栽培,且冷季型观赏草与理想草种的关联度大于暖季型观赏草,其中3种冷季型观赏草(蓝滨麦、蓝羊茅和玉带草)在陕北地区的推广和观赏价值较高;2)春季冷季型观赏草的成活率显著高于暖季型观赏草的成活率。春季冷季型观赏草的观赏价值更高;夏季冷季型观赏草的叶色显著高于暖季型观赏草;秋季蒲苇的叶色、花序美感和观赏价值高,晨光芒的花序美感和观赏价值高,狼尾草的叶色和观赏价值高;冬季蒲苇和蓝羊茅的生长状况和观赏价值高。通过本试验可为陕北地区引种栽培观赏草提供参考依据。

In order to enrich the species of landscaping plants in northern Shaanxi,grey relational analysis was used to analyze the adaptability of 10 ornamental grasses in different seasons,and their ornamental value was systematically evaluated as well. The results showed that:1)All the 10 ornamental grasses could be cultivated in northern Shaanxi area,and the correlation between cold-season ornamental grasses and ideal grass species was greater than that of warm-season ornamental grasses. Three cold-season ornamental grasses(Leymus arenarius,Festuca glauca and Phalaris arundinacea var. picta)exhibited higher promotion and ornamental value in northern Shaanxi area. 2)The survival rate of cold-season ornamental grass in spring was significantly higher than that of warm-season ornamental grass,and the ornamental value of cold-season ornamental grass in spring was higher.The leaf color of cold-season ornamental grass in summer was significantly better than that of warm season ornamental grass. The leaf color,inflorescence beauty and ornamental value of Cortaderia selloana,the inflorescence beauty and ornamental value of Miscanthus sinensis‘Morning Light’,and the leaf color and ornamental value of Pennisetum alopecuroides were higher than those of other species in autumn. The growth status and ornamental value of Cortaderia selloana and F. glauca were higher than those of other species in winter. This experiment can provide references for the introduction and cultivation of ornamental grasses in northern Shaanxi area.