叶面喷施肥料是当前行之有效的施肥技术,已在粮食、薯类等作物和果蔬上广泛应用,喷施的肥料,在氮素化肥中以尿素为最佳,它含氮量高,增产显著。据人们试验,喷一斤尿素,一般都能增十数斤粮食,特别对缺肥的田块,如果及时喷施尿素,能防止早衰,增强叶片的光合作用,增产幅度会更大。尿素作叶面喷施所以能比别的氮素化肥增产显著,这是因为尿素具有比其他氮素更多的优点,这就是: Foliar application of fertilizers is currently well-established fertilization technology, has been widely used in crops such as grain, potato and fruits and vegetables, sprayed fertilizers, urea is the best nitrogenous fertilizer, its nitrogen content is high, Significant increase in output. According to people’s test, spraying a kilogram of urea generally increases ten kilograms of grain, especially for fields lacking fat. If urea is sprayed on in time, it can prevent premature aging and increase the photosynthesis of leaves, thus increasing the yield more. Urea as a foliar spray so it can significantly increase yield than other nitrogenous fertilizers, because urea has more advantages than other nitrogen, which is: