光照对一品红观赏性状的表达效果

Effect of Light on Poinsettia Flower Character Expression

对一品红彼特之星品种进行了光照促花试验,促花组每天给予10 h的光照,以自然光照作为对照处理。结果表明:在暗处理苞叶转色前,处理与未处理的植株间株高、冠幅、枝粗、节间长度、叶片数生长没有明显差异;在处理开花后株高、叶数、枝粗差异达显著水平。处理与未处理相比,花期提前2个月左右,苞片比较大,植株比较矮,冠高比较适合,观赏价值比较好,但花期的枝条偏细偏弱,是否进行暗处理对冠幅没有很大影响。

＂Peterstar Red＂ cultivar of poinsettia （Euphorbia pulcherrima ） was used in flowering treated trial. The treatment（blackeloth） plants were given 10h daylength and others were given natural daylength which were used as CK. The results showed：plant height, breadth of plant, diameter of stem, length of internode and number of leaves were no more difference between treatments and CK before treated plants flowering. However, plant height, breadth of plant, and number of leaves revealed obvious difference after treated plants flowering. Furthermore, the treatments bloomed two months earlier than CK, the bracts were more big, plant height was more short, the ratio of breadth-height of plants was more better and the ornamental value was more better too. But the branchs of treatment were slim. It was no effect on breadth of plants whether by treating.