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1.喷施适期:小麦、玉米等禾谷类作物,在孕穗、扬花、灌浆期为宜;大豆、花生、菜豆等在开花、结荚期喷洒最好;棉花在花铃期喷洒。钼肥在作物开花前喷洒;硼肥、锌肥在初花期喷洒,效果显著。 2.喷肥种类:适宜叶面喷施的肥料有尿素、磷酸二氢钾、过磷酸钙和各种微量元素等。 3.喷施浓度:尿素为1—2％;过磷酸钙为2—4％;硫酸锌、硼砂为0.2％,钼酸铵为0.1％;磷酸二氢钾为0.1—0.2％效果较好。 4.喷洒部位:植株叶背面气孔多,肥料易被吸
1. Spraying appropriate period: wheat, corn and other cereal crops, booting, flowering, filling stage is appropriate; soybeans, peanuts, beans and other flowers in the flowering, pod spraying the best; Molybdenum fertilizer spraying before crop flowering; boron fertilizer, zinc fertilizer spraying in early flowering, the effect is remarkable. 2. Types of fertilizer: suitable for foliar fertilizers are urea, potassium dihydrogen phosphate, superphosphate and various trace elements. Spraying concentration: urea is 1-2%; superphosphate 2-4%; zinc sulfate, borax 0.2%, ammonium molybdate 0.1%; potassium dihydrogen phosphate 0.1-0.2% better. Spraying parts: plant leaf back more stomata, fertilizer easily sucked