复(混)合肥料,简称复肥,是目前世界肥料工业生产和发展的主要肥料形态,也是发达国家用于农业生产的主要肥料品种。复肥含氮,磷、钾三大营养元素,或其中任意两种元素,有时还可兼含其它微量元素。一般分为三类:一、复合肥料:属二元型,它是按化学反应直接得到的产物。因此,不一定适合农作物对氮、磷、钾按比例的要求。 Complex (mixed) Hefei material, referred to as compound fertilizer, is currently the world fertilizer industry production and development of the main fertilizer forms, but also developed countries for agricultural production of the main fertilizer varieties. Compound fertilizer containing nitrogen, phosphorus, potassium three nutrients, or any two elements, and sometimes also contain other trace elements. Generally divided into three categories: First, the compound fertilizer: a binary type, it is a chemical reaction directly to the product. Therefore, it is not necessarily suitable for crops on the proportion of nitrogen, phosphorus and potassium requirements.