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优质米的特性除了受品种遗传因素影响外,栽培条件对米质特性的影响亦是十分重要的。 1.肥料与品质氮肥是影响稻米品质的重要因素。①过量施用氮肥水稻生育期后延,灌浆不足,抗性低,死米、青米增多,腹白也有所增加;精米率、完整米率、米的粘性及食味性均有所下降。②生育中期控制氮肥可提高品质。这是减少二次枝梗的不完全米率的缘故。③齐穗期施肥,能提高品质,表现米粒厚度增加(大于1.9毫米),完整米率和精白米率高,青
Apart from the genetic factors that affect the quality of rice, cultivation conditions on the quality of rice is also very important. 1. Fertilizer and quality Nitrogen fertilizer is an important factor affecting the quality of rice. Excessive application of N fertilizer During the growth period of rice, the grain filling was insufficient, the resistance was low, the dead rice, the green rice increased and the whiteness of the rice also increased. The milled rice rate, the complete rice rate, the rice viscosity and the food taste decreased. ② medium-term control of nitrogen fertilizer can improve quality. This is the reason for reducing the incomplete rice rate of secondary stems. ③ fertilization at heading stage, can improve the quality of the performance of rice grain thickness increased (more than 1.9 mm), the complete rice rate and high white rice rate, green