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一、微肥的概念与特点生物体内几乎含有全部已知的化学元素,在植物体内已被发现的有74种元素,按其含量和作用,大体可分为四类:(一)有机营养元素,亦称有机养分,包括碳、氢、氧、氮,四者占植株干物重99％以上。(二)常量营养元素,亦称常量养分或大量元素,包括氮、磷、钾。(三)中量营养元素,亦称中量养分,包括钙、镁、硫。(四)微量元素和微量养分,微量元素包括除上述几种营养元素以外的60多种元素,其中锌、锰、硼、钼、铜、铁等6种元素在植物生理上有重要作用,称之为微量养分,亦称微量营养元素,在植物体内各只占万分之几至千万分之几;尚有氯、钠、钴、钒、硅,也是微量养分。
First, the concept and characteristics of trace fertilizers Contains almost all known chemical elements in the body, has been found in plants with 74 kinds of elements, according to their content and role, can be roughly divided into four categories: (a) organic nutrients , Also known as organic nutrients, including carbon, hydrogen, oxygen, nitrogen, four dry plant weight accounted for more than 99%. (B) of the constant nutrient elements, also known as nutrient or a large number of elements, including nitrogen, phosphorus and potassium. (C) in the amount of nutrients, also known as the amount of nutrients, including calcium, magnesium, sulfur. (D) trace elements and trace nutrients, trace elements, including addition to the above several nutrients more than 60 kinds of elements, of which zinc, manganese, boron, molybdenum, copper, iron and other six kinds of elements in plant physiology have an important role, said The trace nutrients, also known as micronutrients, each in the plant body accounted for a few thousandths of a few millionths; there are chlorine, sodium, cobalt, vanadium, silicon, is also a trace of nutrients.