大豆常用的微量元素有钼酸铵。钼元素在大豆植株中含量虽不高,但有促进大豆生长发育增加产量和改良品质的作用。钼酸铵对大豆的增产效果因不同土壤而异。据试验表明,南方酸性土壤施钼有显著效益;北方黄土母质上发育的土壤含钼量少,石灰性土壤和中性土壤中钼也缺乏,所以,在这些土壤上种值大豆施用钼肥,效益也高。南方大部分省区大豆施钼肥已有20—25年的增产历史。据江苏试验,大豆施钼肥增产4—36％,平均多在10％以上。江西余江县也取得了增产17—28％的好收成。浙江省以每公斤大豆种子拌2—2.6克钼酸铵作种肥,比未施钼肥的平均亩增产大豆52公斤,增产达88％。湖北沙洋农场8年的大豆施钼酸铵种肥实验和示范都取得了好效果,增产幅度在亩12—31.5公 Soybean commonly used trace elements are ammonium molybdate. Although the content of molybdenum in soybean plants is not high, it can promote the growth and development of soybean and increase the yield and quality. The effect of ammonium molybdate on soybean yield will vary with different soils. According to the experiment, molybdenum fertilizer was apparently beneficial to acidic soils in the south of China. There was little amount of molybdenum in soils on northern loess parent materials, and molybdenum in calcareous soils and neutral soils. Therefore, High efficiency. Soybean molybdenum fertilizer in most southern provinces has 20-25 years of yield history. According to the Jiangsu experiment, soybean yield increased by 4-36% molybdenum fertilizer, an average of more than 10%. Yujiang County, Jiangxi Province has also made a good yield of 17-28% increase. In Zhejiang Province, 2-2.6 grams of ammonium molybdate per kilogram of soybean seed was used as seed fertilizer, 52 kilograms more than the average amount of mu without molybdenum fertilizer, an increase of 88%. Hubei Shayang farm soybean fertilizer ammonium molybdate for 8 years experiments and demonstrations have achieved good results, the rate of increase in Mu 12-31.5 public