播种时间对“金色08”向日葵物候及生长发育的影响

Effects on phenology and growth of sunflower variety ‘Golden 08' in different sowing time

以北京引进的"金色08"向日葵品种为试材,于不同的时间在湖南省长沙地区播种,对其物候与生长发育进行了观测,结果表明:播种至始花期的有效积温约为1 209℃;不同的播种时间的"金色08"的单株花期、群体花期、盛花期等物候期有一定的差异,8月23日播种的向日葵"金色08"始花期、单株花期、群体花期、盛花期、开花时间最长,8月8日播种的植株最高、地茎最粗、盘径最大,而8月23日播种的花径最大、花瓣最长。

Taking the sunflower ‘ Golden 08＇ （ introduced from Beijing） as testing material and adopting different sowing time in Changsha area of Hunan, the phenology and growths of it were observed The result showed that the effective accumulated temperature of ‘ Golden 08＇ is about 1 209 °C from sowing to blooming; there are different characters during different sowing time such as single flowering stage, community flowering stage, full - bloom stage. The sunflower seed sowed in August 23rd had longest time in start flow- ering stage, single flowering stage, community flowering stage, full-bloom stage and flowering time. The sunflower seed sowed in Au- gust 8th had highest plant supreme, the most coarse stalk and the largest disc stem. And the sunflower seed sowed in August 23rd had the biggest bowing and the longest petal.