A field experiment was conducted to investigate the effects of potassium,calcium,and magnesium doses on the growth of banana plant and the leaf physiology characteristics.The results showed that it promoted the growth of banana plant,and offered the good material base for growth of banana fruit effectly with proper K,Ca and Mg in banana plantation.And it promoted the formation of chlorophyll effectively,enhanced the net photosynthesis rate,so improved the photosynthesis ability of leaf effectively.It debase...