陕西省主要观赏草资源及其评价

Main resources of ornamental grasses and its evaluation in Shaanxi Province

【目的】通过对陕西省观赏草资源的综合性状评价,为其合理的开发利用提供参考。【方法】在对陕西省观赏草资源进行初步调查和研究的基础上,利用灰色关联度分析法,对50种观赏草资源的生境、抗性、植株观赏性、株高、叶色和花序等6个性状进行了综合评价。【结果】综合评价比较高的观赏草品种有芦竹(Arund donax)、荻(Miscanthus sacchariflorus)、小香蒲(Typha minima)和地肤(Kochia scoparia)等,其与理想种的关联度分别为0.791 7,0.773 0,0.796 4和0.822 2;32种禾本科观赏草中有88%具有耐旱性,且植株观赏性关联系数低于0.6的仅有7种;50种观赏草中有38种与理想种的关联度在0.6以上。【结论】芦竹(Arund donax)、荻(Miscanthus sacchari-florus)、小香蒲(Typha minima)和地肤(Kochia scoparia)等可直接用于园林绿化美化;50种观赏草中多数具有开发潜力,可从禾本科观赏草中开发出节水耐旱的草种。

[Objective] The study evaluated wild resources of ornamental grasses available in Shaanxi Province and provided some references about their development. [Method] 50 ornamental grasses resources were evaluated using gray-correlation analysis based on the primary investigation and research of resources of wild ornamental grasses in Shaanxi Province, 6 evaluated characters of the ornamental grasses included habitat, fastness, ornamental value, height, color of leaf and inflorescence. [Result] Arund donax, Miscanthus sacchariflorus, Typha minima, Kochia scoparia, etc had better ornamental effects and their correlation degree with the ideal species were 0. 791 7,0. 773 0,0. 796 4 and 0. 822 2;88% of 32 gramineous ornamental grasses could resist drought,and the correlation degree of only 7 species were lower than 0.6; The correlation degree with ideal species of 38 in involved ornamental grasses of 50 were higher than 0.6. [Conclusion] Arund donax, Miscanthus sacchari florus, Typha minima, Kochia scoparia, etc can be used for landscaping directly;Most of 50 ornamental grasses have potential value, and drought-resistant ornamental plants can be developed from gramineous ornamental grasses.