施氮量对两优培九产量与品质的影响

在大田条件下,以汕优63为对照,研究了不同施氮量对两优培九产量与品质的影响．结果表明：两优培九的产量随施氮量的增加而增加,至中肥处理达最大,高肥处理则显著下降;适当增施氮肥有利于营养品质、加工品质、蒸煮食味品质的提高,而高肥对整精米率、垩白度、直链淀粉含量等主要品质性状均不利．产量和品质在品种间均存在显著差异,4个氮肥处理水平下,两优培九的产量均高于汕优63,品质优于汕优63．

Effects of N-application rate on yield and quality of rice Liangyoupeijiu

Effect of N-application rate on yield and quality of rice Liangyoupeijiu was studied, in comparison with Shanyou 63 under field conditions. The results showed that the yield increased with the N-application rate, amounted to the greatest level at moderate N level, then descended dramatically at high N level. It is benefit for the nutrition quality, milled quality, steaming and tasty quality to increase N-application rate properly, but not benefit for the head rice rate, chalkiness, amylose and other quality indexes. The difference was significant for the yield and quality between the varieties. Comparing to the rice Shanyou 63, the yield of the rice Liangyoupeijiu was higher and the quality was better at the four nitrogen treatments.