“萝卜、白菜,各有所爱”,这是说人对食物有所偏爱。其实,植物对它的食物——肥料,也有差异显著的选择性。 “庄稼一枝花,全凭氮磷钾。”这三种要素可谓植物的“主食”,但各种作物对“主食”的需要则并不相同。同样生产100公斤籽粒,冬小麦需氮3公斤、磷1.25公斤、钾2.5公斤;而玉米则需2.5公斤、0.86公斤、2.14公斤。如果对玉米、小 “Radish, cabbage, each has love”, which means that people have a preference for food. In fact, the plants on its food - fertilizer, there are also significant differences in selectivity. “All flowers are made of N, P, and K.” These three elements can be described as the “staple food” of plants, but the needs of various crops for “staple food” are not the same. Also produce 100 kilograms of grain, winter wheat need nitrogen 3 kg, phosphorus 1.25 kg, potassium 2.5 kg; and corn will need 2.5 kg, 0.86 kg, 2.14 kg. If the corn, small