白菜型春油菜果喙生长与其生产特性研究

通过不同品种（系）的田间小区试验及剪喙处理，研究白菜型春油菜果喙生长状况、叶绿素含量及生产力。结果表明：果喙长度在开花后14d基本定型，平均果喙长度占果身长度的38．9％。叶绿素含量为叶片大于果喙，果喙大于果壳，果喙叶绿素含量平均为果壳叶绿素含量的2．7倍以上。剪喙后，角果长度、宽度、果壳干重、角粒数、千粒重和角粒重均呈下降趋势。剪喙时间愈早，对角果生长及其生产力的影响程度愈大。开花后14d剪喙处理的角粒重下降率为20％左右。

The growth and productibility character of pod beak in spring rape (Brassica campestris L. )

A polt experiment in field was coducted to study the growth and chlotophyllous content and productibility of pod beak in different spring rape by cut off pod beak. The result indicated that the pod beak length almost finalized after flowering 14 days, the pod beak length account for 38. 9%of pod length. The sequence of chlorophyllous content was leaf>pod beak>pod shell. The mean chlorophyllous content of pod beak was over 2. 7 times as that of pod shell. The length width, dry weight of pod shell, seeds per pod, 1000-seed weight and seed weight per pod were decreased by cut off pod beak. The effect on growth and productibility of pod result from the time of treatment, which the seed weight per pod decreased around 20% after flowering 14 days compared with the check.