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为弄清钙（Ｃａ）在花芽分化中的作用，以黄花梨为试材，对成花中芽和叶片Ｃａ的动态进行了分析。结果表明：成花中的短枝芽的Ｃａ含量在花芽发端期之前有一个积累高峰，以后随着花芽分化的进行而逐渐被消耗。短枝叶和新梢叶所含Ｃａ是随着叶片的成熟而升高，但在成花发端期呈上升趋势并有所回落；注射ＣａＡｃ和ＰＰ３３３也具有这一趋势，而ＧＡ则使Ｃａ在成花期形成高峰；注射ＣａＡｃ、ＰＰＰ３３３可使中长枝上的腋花芽数明显增多，而ＧＡ则使之减少，并以成花发端以前注射效果最好。
In order to clarify the role of Ca in floral bud differentiation, the dynamics of Ca in flower buds and leaves was analyzed with P. hupehensis. The results showed that the content of Ca in flower buds had a peak of accumulation before flower bud development, and then gradually decreased with flower bud differentiation. The content of Ca in short branches and shoots increased with the maturity of leaves, but it increased at the beginning of flowering and dropped back. CaAc and PP333 also showed the tendency, whereas GA increased Ca Flowering peaked; injection of CaAc, PPP333 could increase the number of axillary buds on middle and long shoots significantly, while GA reduced it, and the injection effect was the best before flowering.