西瓜座瓜时总有一面与地面接触，由于这个“阴面”不能被阳光直接照射，而使瓜皮常呈黄白色，瓜瓤硬，瓜皮较厚，含糖量也较低。同时，瓜的“阴面”生长缓慢，易出现畸形瓜，影响单瓜的重量。实验数据表明，“阴雨”不见阳光能使成熟的单瓜减产１００～１５０克。西瓜定瓜后要 Watermelon seat melon always have contact with the ground, as the “shadow” can not be direct sunlight, leaving the skin often yellowish white, melon hard, thicker cucumber, sugar content is also low. At the same time, melon’s “negative” slow growth, prone to deformed melon, affecting the weight of a single melon. Experimental data show that “rainy” without the sun can make mature single melon cut 100 to 150 grams. Watermelon after the melon to be