长期的生产实践,使广大果农都知道肥料是果树的“粮食”。缺少肥料果树就不能正常生长发育结果。当然更谈不上优质丰产了。最早被果农认识并接受的是氮磷钾三要素肥料。随着科学的发展和测试手段的提高,人们发现仅仅氮磷钾还不能完全满足果树生长发育的需要。 Long-term production practices make the majority of farmers know that fertilizer is the “food” of fruit trees. Lack of fertilizer and fruit trees can not grow and develop normally. Of course, let alone high-quality and high yield. Recognized and accepted by farmers is the first three elements of nitrogen, phosphorus and potassium fertilizers. With the development of science and the improvement of testing methods, it was found that only NPK can not fully meet the needs of fruit tree growth and development.