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叶面喷肥,是蔬菜追肥中一项行之有效的辅助手段。此法用肥少、见效快,还可针对土壤营养和蔬菜生长情况对症下药,因而在蔬菜生产上有广泛的应用,一般可增产15％～30％。 一、选用肥料 1.叶菜类。如白菜、甘蓝、芹菜、菠菜、空心菜、豌豆(食嫩尖)等,叶面喷肥应以氮为主。可用2％尿素液,1.5％碳酸氢铵液等。每亩一次喷施肥液50～60公斤,每季可喷2～4次。其中,菠菜需铁较多,可用0.1％硫酸亚铁液喷1～2次。
Foliar fertilizer, vegetable top dressing is an effective aid. This method with less fat, quick, but also against the soil nutrients and vegetable growth under the right medicine, which has a wide range of applications in the production of vegetables, the general increase of 15% to 30%. First, the choice of fertilizer 1. Leafy. Such as cabbage, cabbage, celery, spinach, spinach, peas (food tender tip), foliar fertilizer should be based on nitrogen. Available 2% urea solution, 1.5% ammonium bicarbonate solution. Fertilizers sprayed once per acre 50 to 60 kg per season can spray 2 to 4 times. Among them, spinach needed more iron, available 0.1% ferrous sulfate spray 1 or 2 times.