研究结果表明，夏大豆初花期施氮１ｋｇ比不施氮对照增产１３９％，结荚期施氮增产９６％，苗期施氮没有增产效果。磷肥施用量同产量之间呈正相关，同每ｋｇＰ２Ｏ５生产的大豆量呈负相关。我们认为，以亩施１５～３ｋｇＰ２Ｏ５最经济。黄淮海平原夏大豆中低产种植区，目前可暂不施用钾肥，但随着产量的提高，缺钾将日趋明显。 The results showed that 1 kg of N application in early flowering stage of summer soybean increased 13.9% compared with the control without nitrogen application and increased by 96% with nitrogen application during the podding stage. There was a positive correlation between phosphate fertilizer application and yield, negatively correlated with the amount of soybean produced per kg P2O5. In our opinion, it is the most economical to apply 15 ~ 3kgP2O5 per mu. Huang-Huai-Hai Plain summer soybean low-yielding cultivation areas, the current temporary can not be applied potassium, but with the increase of yield, potassium deficiency will become increasingly evident.