Trace element fertilizer (referred to as micro-fertilizer) is the fertilizer that contains trace elements of nutrients, such as boron, manganese fertilizer, copper fertilizer, zinc, molybdenum fertilizer, iron fertilizer, manure, such as chlorine, can contain trace elements of a simple compound can also contain a variety of micro-nutrients and a large number of compound fertilizers and mixed fertilizers. Can be used as a basic fertilizer, and other types of fertilizer or spraying.