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研究不同氮肥施用量对粳米的产量、碾磨品质、外观品质和营养品质的影响。结果表明:在高氮(180kg/hm2)处理下,沈农315产量较高,为9.78t/hm2。随着施氮量的增加,糙米率、精米率、整精米率均呈上升趋势,对粳米的碾磨品质有所改善;氮肥施用量对粳米的垩白率和垩白度影响较为明显,使粳米的外观品质变差;施氮量的增加,蛋白质含量也显著增加,脂肪酸含量和综合值却下降,影响了粳米的营养品质。在大米食味感观测定中沈农315无论是在米饭粘性、弹性、外观、香味的总分比沈稻7号和沈稻11都要好,其次是沈稻11,而沈稻7号在回生特性测定方面比较突出。
The effects of different nitrogen rates on the yield, milling quality, appearance quality and nutritional quality of japonica rice were studied. The results showed that Shennong 315 had a high yield of 9.78t / hm2 under high nitrogen (180kg / hm2) treatment. With the increase of nitrogen application rate, brown rice rate, milled rice rate and milled rice rate all showed an upward trend, which improved the milling quality of japonica rice. The effect of nitrogen fertilizer on the chalkiness rate and chalkiness of japonica rice was significant The appearance quality of japonica rice became worse. With the increase of nitrogen application rate, the protein content also increased significantly while the content of fatty acid and the combination value decreased, which affected the nutritional quality of japonica rice. Shennong 315 was better than Shenya 7 and Shenmiao 11 in terms of viscosity, elasticity, appearance and flavor of rice, followed by Shenmiao 11 and Shenyao 7 in reversion characteristics Measurement is more prominent.