下面谈谈鉴别西瓜成熟度的几种方法: 1.计算积温数法。根据果实发育成熟所需积温固定不变的原理进行鉴别,一般情况下果实发育天数也是不变的。如早熟种需要25～28天,中熟种需32～35天,晚熟种需40天以上。据上述标准,在结瓜部位对雌花开花期做出不同标记,不同间隔天数(一般3天)分别插上不同颜色的标熟棒(牌), Here are some ways to identify the maturity of watermelon: 1. Calculate the product of the temperature method. According to the principle that the accumulated temperature required for fruit ripening is constant, the number of fruit development days is also constant. Such as early species need 25 to 28 days, medium-term species need 32 to 35 days, late-maturing species need more than 40 days. According to the above criteria, different parts of the female flower flowering stage are made different marks at the node of the cuckoo, and different colored batons (cards) are inserted at different intervals (usually 3 days)