摘要
皱果桉具有良好的观赏价值.为更好地指导皱果桉在国内园林的推广应用,该文以 3 个皱果桉品系为研究对象,对比观测树形、树干、树皮、花色、花径、花形、花的显著度等 15 个观赏要素,采用层次分析法(AHP)综合评价皱果桉的景观价值.结果表明:皱果桉的观赏价值评分总得分为53分,得分率为70.67%,总权重为92.00%,综合权重属于第Ⅰ类(S≥0.7),是城市道路绿化树种中观赏价值优等的植物.在 3 个品系中,品系 1(无性系)更接近"理想品种".皱果桉花权重值排名前 5 的指标依次为:花的显著度>花期>花是否飞絮或者飞粉>叶色>叶的观赏期,这些指标有利于明确皱果桉的园林应用方向.皱果桉的新生嫩叶、成熟叶和花分别呈火砖红、海藻绿和绯红色,叶、花均具有较长的观赏期.6～7 周的叶色变化趋势为:嫩绿色→火砖红→黄色→黄绿色→绿色;从现蕾到落花 6 周左右的花色变化为:浅绿色→粉红色→绯红色→深红色.
Abstract
Corymbia ptychocarpa has good ornamental value.To better guide its promotion and application in domestic landscaping,this study evaluated three clones of C.ptychocarpa by comparing 15 ornamental traits,including tree shape,trunk,bark,flower color,flower diameter,flower shape,and flower prominence.A comprehensive evaluation of its landscape value was conducted using the Analytic Hierarchy Process(AHP).The results showed that the total ornamental value score of C.ptychocarpa was 53 points,with a scoring rate of 70.67%and a total weight of 92.00%.Its comprehensive weight ranked in the first category(S≥0.7),identifying it as an excellent plant for urban road greening.Among the three clones,strain 1(clone)was closest to the"ideal variety."The top five weighted indicators for the ornamental value of C.ptychocarpa flowers were:flower prominence>flowering period>absence of seed fluff or powder>leaf color>leaf ornamental period.These indicators provide clear directions for its landscaping application.The newly emerged leaves,mature leaves,and flowers of C.ptychocarpa display distinctive colors—brick red,seaweed green,and crimson,respectively.Both leaves and flowers offer extended ornamental periods.Over a span of 6-7 weeks,the leaf color transitions as follows:light green→brick red→yellow→yellow-green→green.Similarly,from budding to flower drop(approximately six weeks),the flower color evolves through the stages:light green→pink→crimson→deep red.
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