【摘要】 为了确定氮肥的施用对江苏沿海地区中熟中粳稻产量及品质的影响，以中熟中粳稻品种南粳5718和盐稻8269为试验材料，设置全生育期不施氮肥（N₀）和折合纯氮量20 kg/667 m²(N₂₀)施氮量2个处理进行大田试验，通过对比与分析2种施氮条件下，中熟中粳稻品种产量及其构成因素和蒸煮食味品质等差异。结果表明，施用纯氮量20 kg/667 m²后，中熟中粳稻南粳5718的高峰苗数、有效穗数、千粒质量、产量分别提高63.27%、62.94%、7.55%、81.96%；盐稻8269则分别增加62.23%、9.94%、5.80%、79.89%;2个品种米饭的食味品质分别降低8.89%、4.12%；整精米率分别显著增加2.00%、1.59%；垩白度分别降低16.99%、10.13%，垩白粒率分别显著降低23.42%、7.7%；蛋白质含量分别显著提升16.67%、9.59%。因此，施纯氮20 kg/667 m²能够提高江苏沿海地区中熟中粳的产量，降低稻米的蒸煮食味品质，提高其营养品质、加工品质和外观品质。更多还原

【Abstract】 In order to determine the effects of nitrogen fertilizer application on yield and quality of mid-ripening and medium geng rice in coastal areas of Jiangsu Province, Nangeng 5718 and Yandao 8269 were used as experimental materials, and field experiments were conducted under two treatments: no nitrogen fertilizer(N0) and 20 kg/667 m2(N20) equivalent nitrogen application. The differences of yield, composition factors, cooking and eating quality of middle-ripe geng rice varieties under two nitrogen application conditions were studied by comparison and analysis. The results showed that after applying 20 kg/667 m2of pure nitrogen, the number of peak seedlings, effective panicle number,thousand-grain weight and yield of Nangeng 5718 increased by 63.27%, 62.94%, 7.55% and 81.96%, respectively. Yandao 8269 increased by62.23%, 9.94%, 5.80% and 79.89%, respectively. The eating quality of two varieties decreased by 8.89% and 4.12%, respectively. The milled rice rate was increased by 2.00% and 1.59%, respectively. The chalkiness and chalkiness grain rate decreased by 16.99%, 10.13% and23.42%, 7.7%, respectively. Protein content was significantly increased by 16.67% and 9.59%, respectively. Therefore, pure nitrogen application of 20 kg/667 m2can improve the yield of medium-ripe and medium geng rice, reduce the cooking and eating quality of rice, and improve the nutritional quality, processing quality and appearance quality of rice in the coastal areas of Jiangsu Province.更多还原