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蓖麻具有无限生长习性,在环境条件适宜的情况下,它能不断生长发育开花结果。但是,在我国淮河以北,由于气侯条件所限,蓖麻生长后期形成的花序因日平均气温低或有效积温不足而不能形成成熟的果穗,造成无效花序较多,影响籽粒的成实度,降低了蓖麻籽的产量。因而,适时打顶和去无效花序是减少养分的消耗,提高蓖麻产量的关键措施。 为了探讨蓖麻打顶及去无效花序的适宜时期,1983至1984年,我们对蓖麻抽序至开花,开花至葫果成熟的时间与温度的相关性和蓖麻抽序至蒴果成熟所需有效积温进行观察,为确定适期打顶及去无效花序的时期提供依据。
Castor has unlimited growth habits, in the case of suitable environmental conditions, it can continue to grow and develop flowering results. However, north of the Huaihe River in our country, due to the limitation of climatic conditions, the inflorescences formed in the late stage of castor could not form mature ears due to the low average daily temperature or insufficient accumulated temperature, resulting in more invalid inflorescences, , Reducing castor bean production. Thus, timely topping and to the ineffective inflorescences are the key measures to reduce the nutrient consumption and increase the output of castor. From 1983 to 1984, we investigated the time-to-temperature dependence of flowering and flowering to ripening castor beans and the flow-through from castor to the desired maturation of the capsule Effective accumulated temperature observation, in order to determine the appropriate topping and to invalid inflorescence provide the basis for the period.