红富士苹果要注重施钾肥红富士苹果对氮肥敏感性较强．稍一过量就可引起徒长，树势变虚。幼树来年春季易抽条，影响成花、结果和着色。且易感染腐烂病和轮纹病。经调查，钾肥施量符合要求的（实践证明：氮：磷：钾＝１：０．６：１．５在这比例范围内比较适宜）上述现象可... Red Fuji apple should pay attention to the application of potassium Fuji apple is more sensitive to nitrogen. A little excess can cause leggy, tree changes become empty. Saplings come spring in the coming year, affecting flowering, fruiting and coloring. And susceptible to rot and rot disease. After investigation, the amount of potassium fertilizer to meet the requirements (Practice has proved: nitrogen: phosphorus: potassium = 1: 0.6: 1.5 in this ratio range is more appropriate) The above phenomenon can be ...