近年来,随着农作物产量的提高和有机肥施用量的减少,农作物微量元素缺乏症越来越明显,尤以小麦缺锰、棉花缺硼、玉米缺锌、大豆缺钼现象更严重。农作物缺少微量元素会抑制其光合作用、呼吸作用及物质转化,影响产量和品质。故应采取相应的补救措施。一、小麦施用锰肥。小麦缺锰主要表现为形成白穗,植株呈枯焦状。锰肥可作基肥、拌种或根外追肥。基肥一般每亩用硫酸锰1—4公斤。拌种每 In recent years, with the increase of crop yield and the decrease of the application of organic manure, the trace element deficiency of crops is more and more obvious, especially the lack of manganese in wheat, the lack of boron in cotton, the lack of zinc in maize and the shortage of molybdenum in soybean. The lack of trace elements in crops can inhibit their photosynthesis, respiration and material conversion, affecting yield and quality. Therefore, the corresponding remedial measures should be taken. First, the use of manganese fertilizer. Manganese deficiency is mainly caused by the formation of white spike, plants were Kujiao-like. Manganese fertilizer can be used as base fertilizer, seed dressing or root top dressing. Basal fertilizer per mu with ammonium sulfate 1-4 kg. Seed dressing every