群体水培试验表明，两优培特生育期间Ｎ素营养供给不宜波动太大，以１．５ｍｍｏｌ／Ｌ的平衡供Ｎ效果最佳，表现为前期分蘖多，干物质积累迅速；中期颖花分化多，退化率低，茎鞘的Ｎ素含量１．５％～１．８５％范围内，茎鞘碳水化合物积累较高；抽穗以后，茎鞘碳水化合物转运快，转运率高，有利籽粒灌浆结实，结实率高，千粒重大，单株产量高。 The population hydroponics experiments showed that N supply should not fluctuate too much during the growth period of Liangyou Peite, and the N supply was the best with the balance of 1.5 mmol / L, which showed that there were many tillers in the early stage and rapid accumulation of dry matter. And the rate of degradation was low. Within the range of 1.5% -1.85% of the N content of stem and sheath, the accumulation of carbohydrate in stem and sheath was higher. After heading, the carbohydrate transport of stem and sheath was rapid and the rate of translocation was high, , High seed setting rate, one thousand grain weight, high yield per plant.