1. Combining climate features in Yi Chang, gardening program of cities, shape characteristics of species and production practice, totally 23 main flower species (contain 6 super species) which are suitable for growing in Yi Chang District are selected such as Beta vulgari var. cicla, Viola tricolor, Petunia hybrida, Portulaca grandiflora, Salvia splendens, Calendula officinalis and so on..Four patterns of crops for rotation which are suitable for annual arrangement in cities` flower beds are imitated and analyzed, meanwhile the guidance is offered for gardening production in city square.
结合宜昌气候特点、城市园艺规划、品种形态特征和生产实践，共筛选出红梗甜菜（ Beta vulgaris var.cicla ）、三色堇、矮牵牛、半支莲、一串红、金盏菊等适合宜昌地区种植的23个花卉主要品种(含6个骨干品种)，并模拟、分析提出了适合城市花坛周年配置的四种茬口模式，力求为城市广场园艺生产提供指导。