夏大豆产量的高低与各生育期的生长发育状况,养分吸收代谢有密切关系。夏大豆在亩产182kg的产量水平下,每生产100kg籽粒,需要N7.7kg,P_2O_5 2.3kg,K_2O 4.9kg。夏大豆干物质积累的特点是,结荚至鼓粒期积累最快,积累率为35.3％,每株日增重21.7g。夏大豆吸收氮磷钾的数量随生育阶段而不同。植株氮磷钾含量是生育前期高于生育后期。而吸收量以结荚至鼓粒期吸收最多,氮、磷、钾吸收量分别占总吸收量的26.9％,30.9％,38.9％。鼓粒期以后,植株中氮、钾含量明显下降,唯有磷素还在继续吸收。 The level of summer soybean yield and growth and development of each growth period, nutrient uptake and metabolism are closely related. Summer soybean yield of 182kg per mu level, each producing 100kg of grain, you need N7.7kg, P_2O_5 2.3kg, K_2O 4.9kg. The characteristic of summer soybean dry matter accumulation is that the accumulation of pod to drum stage is the fastest, the accumulation rate is 35.3% and the daily weight gain is 21.7g. The amount of nitrogen, phosphorus and potassium absorbed by summer soybeans varies with the growth stage. Nitrogen, phosphorus, potassium content of plants is higher than the early growth stage. The absorption amount of pod to drums uptake most absorption, nitrogen, phosphorus and potassium absorption accounted for 26.9%, 30.9%, 38.9% of the total absorption. Drum grain period, the plant nitrogen and potassium content decreased significantly, only the phosphorus is still continuing to absorb.