一、根茎类蔬菜科学使用叶面肥的方法以块茎、块根为主食的蔬菜即根茎类蔬菜，如土豆、大蒜、大葱、莲藕和胡萝卜等。其生理特性是：全生育期对磷、钾肥的需求多于氮肥，尤其是中、后期对钾的需求更为敏感。所以这类蔬菜除苗期追施少量氮肥外，应在中、后期多施钾、磷肥，以满 First, the method of scientific use of rhizome vegetables Foliar, root tubers for the staple food that vegetables, such as potatoes, garlic, green onions, lotus root and carrot. Its physiological characteristics are: the whole growth period of phosphorus, potassium demand more than nitrogen, especially in the late demand for potassium is more sensitive. Therefore, such a small amount of nitrogen in addition to seedling pursuit of nitrogen fertilizer, should be in the late, more potassium, phosphate fertilizer to full