当蔬菜体内铜的含量小于4毫克/公斤时,就可能发生缺铜。缺铜时,植株矮小,出现失绿现象,易感染病害,明显特征是花的颜色发生褪色现象。缺铜严重时叶片或果实均褪色,顶梢发白枯死并向下蔓延。一般单子叶蔬菜对铜元素比较敏感;双子叶蔬菜差一些,但胡萝卜施用铜肥效果好。蔬菜对铜 Copper deficiency may occur when the copper content in vegetables is less than 4 mg / kg. Shortages of copper, plants dwarf, the phenomenon of loss of green, susceptible to disease, the obvious feature is the color of flowers fade. In the absence of copper, the leaves or fruits are faded, the shoots are white and dead and spread downward. Common monocotyledon vegetables are more sensitive to copper; dicotyledonous vegetables are worse, but carrot application of copper fertilizer is good. Vegetables to copper