“钟字牌”叶面肥是由北京海峡科技开发部研制，营口叶面肥厂生产的一种高科技新产品。它是吸取配方施肥技术及国内外微量元素成果，选用农作物所必需的氮、磷、钾常量元素及锰、铁、锌、硼等微量元素，填加速溶辅展剂精制而成。氮、磷、钾有效养分总含量≥１５%，微量元素≥１ “Zhongzi” Foliar is developed by the Beijing Strait Science and Technology Development Department, Yingkou foliar fertilizer plant to produce a high-tech new products. It draws formula fertilization technology and trace elements results at home and abroad, the necessary elements of the crop nitrogen, phosphorus, potassium and trace elements such as manganese, iron, zinc, boron and other trace elements, filled with soluble adjuvant refined refined. Nitrogen, phosphorus, potassium total effective nutrients ≥ 15%, trace elements ≥ 1