8个彩叶紫薇品种观赏性及适应性评价

Evaluation of ornamental value and adaptability of eight varieties of crape myrtle with color leaves

运用层次分析法(analytic hierarchy process,AHP)对8个彩叶紫薇品种的观赏性、生态适应性与生长特性进行综合评判,以筛选出适应江苏省南通地区的优良彩叶紫薇品种。结果表明:叶色的权重最大,其次为花色,两者是评价彩叶紫薇观赏性的重要指标;整体形态及果实权重相对较小,是观赏性评价的辅助指标;抗病虫害和耐水湿是评价彩叶紫薇适应性的重要指标;生长速度快慢也是引种能否成功较为关键的因素。通过综合分析模型可知,‘火红’(‘Blush’)、‘赤红’(‘Red Hot’)和‘绯红’(‘Crimson Red’)3个品种的综合评价等级达到Ⅰ级,尤其以‘火红’为佳。

With the analytic hierarchy process(AHP),the ornamental value,ecological adaptability and growth characteristics of eight varieties of crape myrtle with color leaves were evaluated comprehensively,which helping to select out the best varieties adapting to Nantong area in Jiangsu Province.The results showed that the weight value of leaf color is the largest,followed by flower color,which are important indexes to evaluate the ornamental value of crape myrtle.The weight values of overall form and fruit were auxiliary indexes of ornamental evaluation.Resistance to pests and diseases and wet resistance were important indexes to evaluate the adaptability of crape myrtle.Growth rate was also a key factor for successful introduction.Through the comprehensive analysis model,three crape myrtles with color leaves belonged to gradeⅠlevel,including‘Blush’,‘Red Hot’and‘Crimson Red’,among which‘Blush’was especially the best of all.