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果树叶面施肥,可使叶片迅速地直接吸收养分,对于保果壮果,提高座果率,增强村势,改善果实品质等具有很大作用。但叶面施肥要掌握如下要点。 1.选择适宜的肥料 常用的肥料有尿素、硫酸铵、硝酸钾、磷酸二氢钾、过磷酸钙等。易挥发的肥料,不宜做叶面施肥使用,如氨水、碳酸氢铵、氯化铵等。 2.配好肥液的浓度 肥液浓度不能偏高,否则极易损伤树叶。一般肥液的浓度是:尿素0.2％～0.5％,硫酸钾0.3％～0.8％,过磷酸钙(滤液)0.5％～1.0％。在施用时应灵活掌握,如幼叶喷施的浓度低,成叶浓度较高;少雨季节浓度低,多雨季节浓度高。
Fruit foliage fertilization, can make the leaves absorb nutrients quickly, for fruit and fruit, improve fruit rate, enhance the village situation, improve the quality of fruit has a significant role. However, foliar fertilizer to master the following points. 1. Choose the appropriate fertilizer Fertilizer commonly used urea, ammonium sulfate, potassium nitrate, potassium dihydrogen phosphate, superphosphate and so on. Volatile fertilizer, foliar fertilization should not be used, such as ammonia, ammonium bicarbonate, ammonium chloride and so on. 2. With a good concentration of fluid fertilizer fluid concentration can not be high, otherwise easily damaged leaves. The general concentration of fertilizer is: urea 0.2% to 0.5%, potassium sulfate 0.3% to 0.8%, superphosphate (filtrate) 0.5% to 1.0%. In the application should be flexible grasp, such as the young leaves sprayed low concentration into a higher leaf concentration; less rainy season, low concentrations, high concentrations of rainy seasons.