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大豆对钼、硼、锰、锌、铁五种微量元素比较敏感,根据土壤中微量元素的含量及大豆的生长情况,酌施微肥可以防治大豆缺素症,促进大豆增产。 钼:大豆缺钼时,叶色淡黄,生长不良,表现出缺氮症状。严重时中脉坏死,叶片变形。喷施钼肥,可以增加根瘤菌的固氮量,提高大豆蛋白质含量。此外,还能增加叶片中的叶绿素含量,有利于磷的吸收、分配和转化,增强大豆种子的呼吸强度。从而增加单株粒数和粒重,促进早熟,提高种子的发芽势和发芽率。一般在开花期,选择无风、空气湿度较大的天气,用0.05～0.1％的钼酸铵水溶液,把值株功能叶片喷洒均匀即可。
Soybeans are sensitive to the five trace elements of molybdenum, boron, manganese, zinc and iron. According to the content of trace elements in soil and the growth of soybean, the application of trace fertilizer can prevent and cure soybean deficiency and promote the increase of soybean yield. Molybdenum: Soybeans lack of molybdenum, leaf color yellow, poor growth, showing symptoms of nitrogen deficiency. Severe midrib necrosis, leaf deformation. Spraying molybdenum fertilizer can increase the amount of nitrogen fixation Rhizobium, soybean protein content. In addition, the chlorophyll content in leaves can also be increased, which is beneficial to the absorption, distribution and transformation of phosphorus and enhances the respiration intensity of soybean seeds. Thereby increasing the number of grains per plant and grain weight, promoting precociousness and improving seed germination potential and germination rate. Generally in the flowering period, the choice of no wind, the air humidity of the weather, with 0.05 to 0.1% ammonium molybdate aqueous solution, the value of plant function leaves spray evenly.