日本各地都有梅的栽培,总面积达21.75万亩。但历年产量变动较大,究其原因,主要与梅树花期出现的早晚有关。如冬暖气温高的年份,开花期提前,访花昆虫飞来活动少,使授粉、受精不良,造成歉年或无收年。这种情况,从表1所列产量与开花期呈高度正相关关系,也可得到理解。由此想 All over Japan have Mei cultivation, with a total area of ​​217500 acres. However, over the past years, the output has fluctuated greatly. The reason for this is mainly due to the early or late plum blossom. If the winter temperature is high, flowering in advance, visit the flowers flying insects less, so that pollination, fertilization poor, resulting in poor year or no year. This can also be understood from the highly positive correlation between yield and flowering in Table 1. Think of this