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肥料是植物的粮食。各种作物都需要一定的营养物质来满足它生长发育的需要。大豆在营养需要上与禾谷类不同。首先,它需要的营养物质在量上比禾谷类多。我们都知道大豆含有丰富的蛋白质、脂肪及灰分,种子中蛋白质含量约为小麦、玉米、水稻种子的3—4倍;灰分含量约为小麦、玉米、水稻种子的2—4倍;豆秸中粗蛋白的含量也远远高于小麦、玉米、水稻的茎秆。可见形成相同的产量,大豆较小麦、玉米、水稻等作物需要更多的矿质营养。在养分的积累上大豆和禾谷类也有不同。禾谷类在开花期营养生长基本结束;大豆营养生长和生殖生长并行的时间长。比如水稻到开花期吸收氮、磷已基本结束;而大豆在开花始期氮、磷、钾吸收量还只占吸收量最高时的1/3—
Fertilizer is the food of the plant. All kinds of crops need certain nutrients to meet the needs of its growth and development. Soybeans differ in their nutritional requirements from cereals. First, it requires more nutrients than cereals. We all know that soybeans are rich in protein, fat and ash. The content of protein in seeds is about 3-4 times that of wheat, corn and rice seeds. The ash content is about 2-4 times that of wheat, corn and rice seeds. Crude protein content is also much higher than the wheat, corn, rice stems. Visible formation of the same yield, soybeans, wheat, corn, rice and other crops need more mineral nutrition. The accumulation of nutrients on the accumulation of soybeans and cereals are also different. Cereal vegetative growth in the flowering stage is basically over; soybean vegetative and reproductive growth in parallel for a long time. Such as rice to the flowering stage to absorb nitrogen, phosphorus has basically ended; and soybean in the flowering of nitrogen, phosphorus and potassium absorption also accounts for the highest absorption of 1 / 3-