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一、落花1、花芽分化不良。花芽分化时温度过低,光照条件差,分苗伤根等不良环境均可导致花芽分化不正常而落花。2、环境因素引起授粉、受精不良,花期遇低温,特别是夜温低于12℃,花粉管不能正常生长,易导致受精不正常而落花。开花期高温,特别是夜温高于22℃,也可引起花粉管伸长不良,造成受精异常;土壤干旱,空气湿度过小或过大,均会影响花粉发芽,造成受精异常而落花。
First, the flowers 1, flower buds poorly differentiated. Flower bud differentiation temperature is too low, poor light conditions, sub-seedling roots and other adverse conditions can lead to flower bud differentiation is not normal and falling flowers. 2, environmental factors cause pollination, poor fertilization, flowering encountered low temperature, especially at night temperatures below 12 ℃, pollen tube can not grow normally, easily lead to abnormal fertilization and falling flowers. High temperature during flowering, especially night temperature above 22 ℃, can also lead to poor elongation of pollen tube, resulting in abnormal fertilization; soil drought, air humidity is too small or too large, will affect the germination of pollen, causing abnormal fertilization and falling.