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以79个观赏铁线莲(Clematis)栽培品种为对象,对Ⅰ次花的现蕾日期、孕蕾期天数、始花日期、盛花日期、落花日期、末花日期、单朵花期天数、花期天数和观赏期天数等9个性状进行了连续3年的系统观察和分析。以始花日期相差16 d为级差,将供试品种划分为极早花、早花、中花、晚花和极晚花等5大类群;以观赏期天数相差5 d为级差划分为极短花期、短花期、中长花期、长花期和超长花期5大花期长短类群。通过观赏多度指数(CDI)分析确定了铁线莲的最佳观赏期为4月中下旬至5月中下旬。温度是影响铁线莲花期的主要因素,孕蕾期天数、花期天数、观赏期天数与气温均显著相关,而单朵花期与气温相关性不显著。本结果可为铁线莲在园林应用中的品种组合配植、专类园建设、定向育种亲本选配等提供依据。
A total of 79 cultivars of Clematis were used to study the budding date, the number of days of budding, the date of flowering, the date of flowering, the date of flowering, the date of flowering, the days of single flowering, the days of flowering And the number of ornamental days and other 9 traits for 3 consecutive years of systematic observation and analysis. The difference of the first flowering date was 16 d, and the tested cultivars were divided into five groups: extremely early flowering, early flowering, middle flowering, late flowering and late flowering; Flowering stage, Short flowering stage, Middle flowering stage, Long flowering stage and Long flowering stage. The best ornamental period for Clematis was from late April to mid-May through the CDI analysis. Temperature is the main factor that affects the flowering stage of Clematis. The number of days of budding, the days of flowering and the days of viewing are significantly correlated with the temperature, but the correlation between temperature and single flowering is not significant. The results may provide the basis for the combination and planting of clematis in the landscape application, the construction of special garden and the matching of directional breeding parents.