铁是作物生长发育必需的微量元素之一,在作物体内参与代谢过程中的电子传递,能促进叶绿素的形成和作物根内硝酸还原,参与豆科作物根瘤固氮作用。铁还是植物吸收氮和磷的限制因素。缺铁时,植物不能充分有效地利用氮和磷;铁过量时,则会降低磷肥肥效。铁在作物根中含量最高,其次是 Iron is one of the trace elements necessary for the growth and development of crops. It is involved in the electron transfer in the body during the metabolic process, which can promote the formation of chlorophyll and nitrate reduction in crop roots, and participate in the nodulation and nitrogen fixation of leguminous crops. Iron is also a limiting factor for plants to absorb nitrogen and phosphorus. Iron deficiency, the plants can not fully and effectively use nitrogen and phosphorus; iron over, it will reduce fertilizer efficiency. Iron is the highest content of crop roots, followed by