香蕉对铜元素比较敏感,轻微缺铜则表现生长不良,叶片变小较疲软、长速减慢,花芽分化推迟20天左右。严重缺铜时则折叶片,在花芽分化前15～20天开始折1～2片,抽蕾后,在叶柄基部开始开裂痕。底部青叶片迅速下折,一般折3～5片,严重的下折8～10片。叶片下折后15～20天黄化枯死。这样黄化1片、上面青叶又下 Banana is more sensitive to copper, slightly poor performance of copper is poor growth, leaves smaller weaker, long slow, flower bud differentiation postponed about 20 days. Serious lack of copper folds leaves, in the flower bud differentiation 15 to 20 days before the beginning of folding 1 to 2, after the bud, began petiole base crack marks. The bottom of the green leaf quickly under the fold, usually folded 3 to 5, under the serious fold 8 to 10. Leaves under the folds 15 to 20 days yellow dead. This yellow 1, above the green leaves and down