科学合理的施肥应该是 :既能供应作物对各种必须养分的充分需要 ,又有适宜的肥料比例 ,做到均衡地或平衡地供应作物各种必须的营养元素 ,达到增产增收的目的。目前 ,国内推广的平衡施肥法主要应用于小麦、玉米、水稻、蔬菜等作物 ,实践证明 :粮食作物应用平衡施肥法一般可增产 Scientific and reasonable fertilization should be: not only the supply of crops for all kinds of essential nutrients needs, but also the appropriate proportion of fertilizers, so that a balanced or balanced supply of crops all kinds of essential nutrients to achieve the purpose of increasing production and income. At present, the balanced fertilization method promoted in China is mainly applied to crops such as wheat, corn, rice and vegetables. The practice has proved that application of balanced fertilization methods for grain crops generally increases production