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影响花芽分化的外部因素光照周期和光量大多数果树为非光周期植物。黑穗醋栗和草莓在短日照下形成花芽,日照长短不影响苹果形成花芽,但它在长日照下花芽量较多。不同品种的葡萄,在不同日照长度条件下,花芽形成的量不同。如在8小时1077.28米烛光和16小时548.64米烛光的光能是相同的,但白玫瑰葡萄形成花序的原基数,后者是前者的3倍,瑞尼雷司令葡萄为2倍,西拉兹葡萄却没有差异。光量对果树花芽分化影响很大。俗语说:“无光不结果”,光照不仅影响光合作用,也影响内源激素的平衡。生长素在强光下,特别是在紫外光下可能被钝化或分解。紫外光也使植物乙烯量增加。在高海拔、光照强的地区,新梢生
External Factors Affecting Flower Bud Differentiation Light Cycle and Light Levels Most fruit trees are non-photoperiod plants. Black currants and strawberries form flower buds under short sunshine. The length of sunshine does not affect the formation of buds of apples, but the flower buds are more under the long sunshine. Different varieties of grapes, in different sunshine length conditions, the amount of flower buds formed in different. For example, at 1077.28 meters for 8 hours and 548.64 meters for 16 hours, the light energy of the candle is the same, but the white rosette forms the original base of the inflorescence, which is 3 times that of the former and 2 times that of the Rana Riesling grape, Grapes are not different. The amount of light on the fruit flower bud differentiation. As the saying goes: “no light no result,” light not only affects photosynthesis, but also affect the balance of endogenous hormones. Auxin may be passivated or decomposed in bright light, especially under ultraviolet light. Ultraviolet light also increases the amount of ethylene in plants. In high altitude, light areas, the new shoot students