观赏植物的精准应用有助于提升城市公园品质。对湛 江地区 14 个观赏向日葵 Helianthus?annuus 品种进行夏季田 间引种试验，观测、记录和分析其 8 个物候特征和 14 个表 型性状，结果表明各观赏向日葵品种间物候特征具有差异性， 表型变异较为丰富，14 个品种聚类为四大类群。进一步探讨 了观赏向日葵应用的品种选择、种植调节及配植方式，为观 赏向日葵多重配植方式、应用分类和节庆精准应用提供了科 学依据。

The accurate application of ornamental plants helps to improve the quality of urban parks. 14 ornamental Helianthus annuus cultivars were introduced to field experiment in Zhanjiang?in summer, and their phenological characteristics and 14 phenotypic traits were observed, recorded and analyzed. The results showed that the phenological characteristics of different ornamental Helianthus annuus cultivars differed from each other, and phenotypic variation was abundant. Cluster analysis showed that 14 ornamental Helianthus annuus cultivars were divided into 4 groups, which were consistent with results of phenology characters and phenotypic traits survey. The cultivars selection, planting adjustment and planting arrangement of ornamental Helianthus annuus were further discussed. It provides scientific basis for the multiple planting menthods, classification and accurate application of ornamental Helianthus annuus

S688

广东海洋大学重点学科培育项目（B20105）