南京地区观赏草的适应性和利用价值初步评价

对3科17属30种(27份从国外引进栽培的观赏草和3份南京本土引种的材料)观赏草外部性状、物候期、抗寒性、耐热性、抗病虫性和整株、花序、叶的观赏性进行跟踪观测,评价并分析其在南京地区的适应性和观赏价值,分成A-E 5个等级.A级:细茎针茅Nassella tenuissima、矮蒲苇Cortaderia selloana 'Pumila',具有很好的观赏性和南京地区适应能力,完全适合在南京地区推广;B级:紫田根Saccharum arundinaceum、柳枝稷Panicum virgatum 'Rehbraun'、发状苔草Carex albula、皱苞苔草C. chungii C.P.Wang、蓝灰石竹Dianthus gratianopolitanus 'Bath's pink'、甜茅S.ravennae、狼尾草Pennisetum、棕榈叶苔草C. muskingumensis、歌舞芒Miscanthus sinensis 'Cabaret'、芦竹Arundo donax、劲芒M. sinensis 'Strictus'、小盼草Chasmanthium latifolium,有较好观赏性和地区适应性,可以在南京地区推广;C级:宽叶苔草C.flacca、Sorghastrum nutans、金边苔草C. oshimenis 'Gold Strike'、巨针茅Stipa gigantea、斑叶苔草C.variegated、遍生芒M.sinensis 'Cosmopolitan'、花叶虉草Phalaris arundinacea 'Picta'、晨光芒M.sinensis 'Morning light'、拂子茅Calamagrostis overdam,具有一定的观赏价值,但个别指标评分低,应用时增加保护措施;D级:桔红苔草C.testacea、红叶白茅Imperata cylindrica 'Red Baron'、褐红苔草C.comans 'Bronze'、球茎燕麦Arrhenatherum elatius subsp.Bulbosum、花叶芦竹Arundo donax 'Variegata'、画眉草Eragrostis spectabilis,关于花序表现的几个指标评价均较低,影响总体评价,可以在南京地区推广但不适合观花,可以作为观叶植物;E级:金黄蒲苇Cortaderia selloana 'Aureolineata'各项指标评分都较低,不适合在南京地区推广.

Preliminary evaluation of adaptability and utilization value of ornamental grasses in Nanjing

Three native grasses and twenty-seven introduced horticultural grasses,which belong to 3 families and 17 genus,were used to evaluate the adaptability and utilization value in terms of growth characteristics,stress resistance and ornamental value with 5 scores system(from A to E).At the same time,the leaf color,height and growing period were recorded.The results showed that the grasses in A group were Nassella tenuissima and Cortaderia selloana(Pumila),they performed satisfactory ornamental value and adaptability in Nanjing and were suitable to be utilized in Nanjing.The grasses in B group were Saccharum arundinaceum,Panicum virgatum(Rehbraun),Carex albula,C.chungii,Dianthus gratianopolitanus(Bath's pink),S.ravennae,C.muskingumensis,Miscanthus sinensis(Cabaret),Arundo donax,M.sinensis(Strictus) and Chasmanthium latifolium,these grasses showed good performance and could be used in Nanjing.The grasses in C group were C.flacca,C.variegated,Calamagrostis overdam,M.sinensis(Cosmopolitan),M.sinensis(Morning light),Phalaris arundinacea(Picta),Sorghastrum nutans and Stipa gigantean,these had an ornamental value but some of them should be under protection when being used in landscape.The grasses in D group were C.testacea,C.comans(Bronze),Arrhenatherum elatius subsp.Bulbosum,Arundo donax(Variegata) and Eragrostis spectabilis,these could be used in Nanjing but not as ornamental plants.The grass in E group was Cortaderia selloana(Aureolineata),it was not suitable in Nanjing.