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研究了红壤旱地上氮磷钾营养对春大豆产量品质的影响，结果表明：施用一定量氮肥有利于大豆根瘤的形成和固氮，施氮量过大则对结瘤有抑制作用；氮磷钾肥合理用量及配比有利于植株吸收养分和干物质积累，协调生长，从而提高产量改善品质；施肥主要是通过提高单株分枝数、单株荚数和粒数而增产，对百粒重影响较小。本试验条件下，氮肥用量以１２０～１６５ｋｇ／ｈｍ２，氮磷钾配比以（０．９８～１．２）∶０．９８∶１为宜。
The effects of nitrogen, phosphorus and potassium nutrition on the yield and quality of spring soybean were studied. The results showed that the application of a certain amount of nitrogen fertilizer was beneficial to the formation and nitrogen fixation of soybean nodule, while the excessive nitrogen application could inhibit the nodulation. Dosage and proportioning were beneficial to plant nutrient uptake and dry matter accumulation, coordinated growth, thus improving yield and improving quality. Fertilization mainly increased yield by increasing number of branches per plant, pods per plant and number of grains, small. Under the experimental conditions, the amount of nitrogen fertilizer to 120 ~ 165kg / hm2, NPK ratio (0.98 ~ 1.2): 0.98: 1 is appropriate.