推荐回答（1个）
形态观察法：一般情况下，结瓜节及其前后节的卷须变黄或枯萎说明该瓜己成熟。另外，瓜成熟后瓜皮便呈出本品种特有的光泽和色彩；成熟后瓜皮发亮，花纹清晰，表皮细筋突起；成熟的瓜，其贴地面的瓜皮，深绿皮品种变为黄色，浅色皮品种变为绿白色。成熟瓜瓜柄基部茸毛脱净。
听声音法：用手轻敲瓜皮时发出“嘭嘭”低浊音的为成熟瓜，发出“咚咚”清脆声音的是未成熟瓜。但有时瓜皮较厚或死秧瓜，虽然不熟，敲时也会发出“嘭嘭”声。春天上市较早的瓜易出现这种情况。
手摸法：用手触摸近瓜柄的瓜肩，光滑的为成熟瓜，否则为未成熟瓜。用手轻压瓜的脐部附近，有弹性为成熟瓜。一手托瓜，另一手拍打其上部，震手心的说明瓜己成熟，否则不成熟。
瓜柄检查法：成熟瓜收获时瓜柄切口处有棕褐色汁液流出，未成熟的则没有。
比重法：一般来说，成熟瓜比重小1，放于水中能浮起来。未成熟瓜比重大于1，在水中浮不起来。
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