肥料是作物的“粮食”。科学施肥的目的,在于使作物高产、稳产,改善产品品质,有较高经济收益,并不断提高土壤肥力、为粮食丰产奠定良好的基础。要做到科学施肥,首先应该了解作物正常生长发育所必需的营养元素及生理作用等问题。作物正常的生长发育和开花结实,除需要一定的光照、水分、空气和温度条件外,还需要从外界吸收大量元素N、P、K和必需的微量元素锰、锌、硼,铜钼等。虽然微 Fertilizer is the “food” of the crop. The purpose of scientific fertilization is to make crops high yield, stable yield, improve product quality, higher economic returns, and continuously improve soil fertility, lay a good foundation for the grain yield. To achieve scientific fertilization, first of all should understand the normal growth and development of crops required nutrients and physiological effects and other issues. In addition to the need for certain light, moisture, air and temperature conditions, crops also need to absorb large amounts of N, P and K and trace elements such as manganese, zinc, boron and copper and molybdenum from the outside world. Although micro