叶菜类叶菜类主要有白菜、青菜、菠菜、苋菜等。叶菜类追肥以氮肥为主,但生长盛期在施用氮肥的同时,还需增施磷、钾肥。如栽培大白菜,开始进入莲座期和包心前的两次施肥是丰产的关键。若全生育期氮肥供应不足,则植株矮小,组织粗硬,春季栽培的叶菜还易早期抽薹;若结球类叶菜后期磷、钾肥不足,往往不易结球。果菜类果菜类包括瓜类、茄果类和豆类,食用部分都是生殖器官。一般幼苗需氮肥量较多,但过多施用氮肥易引起徒长, Leafy vegetables mainly cabbage, vegetables, spinach, amaranth and so on. Topdressing leafy vegetables nitrogen-based, but the growth of nitrogen fertilizer application at the same time, need to increase phosphorus, potassium. Such as the cultivation of Chinese cabbage, began to enter the rosette stage and twice before the fertilization is the key to high yield. If the whole growing period of inadequate supply of nitrogen, the plant is short, coarse tissue, spring leafy cabbage is also easy to early bolting; late tubers Latex phosphorus, potassium is often difficult to ball. Fruits and vegetables Fruits and vegetables, including melons, solanaceous and legumes, edible parts are reproductive organs. Generally need more nitrogen fertilizer, but too much nitrogen fertilizer is easy to cause leggy,