一、发展大豆生产的意义大豆既是粮食作物,又是经济作物。籽粒富含多种营养成份。据测定:含蛋白质40％,脂肪20％,碳水化合物30％,同时富含多种维生素及矿物质,其营养价值高于小麦、玉米等禾谷类怍物。植株根部着生根瘤,可以固氮。据试验,每亩可固氮3～3.5公斤,相当于10.2～11.9公斤硝酸铵的肥效。大豆茎秆是良好的牲畜粗饲料,含 First, the significance of the development of soybean production Soybean is both a food crop, but also a cash crop. Grain is rich in nutrients. It is determined: 40% protein, 20% fat, 30% carbohydrates, while rich in vitamins and minerals, its nutritional value is higher than that of wheat, corn and other cereal products. Plant roots with root nodules, nitrogen fixation. According to the test, per acre can be nitrogen 3 ~ 3.5 kg, equivalent to 10.2 ~ 11.9 kg of ammonium nitrate fertilizer. Soy stalks are good livestock fodder, containing