对6个优质晚籼稻品种在江西北部上高、中部吉安、南部赣州3个不同生态区下产量及品质的变化,灌浆结实期温度与产量、稻米品质的关系进行了研究,以明确优质晚籼稻的生态适应性和稳产性。结果表明,随着纬度降低,各品种产量逐渐降低,外观品质、营养品质变优;直链淀粉含量下降,峰值粘度、崩解值以及糊化温度增加。优质晚籼稻产量主要受齐穗-成熟阶段的日最高温影响,外观品质主要受齐穗-成熟阶段的日最低温影响,直链淀粉含量主要受齐穗-齐穗后20 d的日最低温影响。优质晚籼稻在赣北地区种植能发挥产量优势,而在赣南地区种植则具有品质优势。

The yield and quality change of six high quality late indica rice varieties planted at three different ecological regions of Shanggao, Jian and Ganzhou were studied, to clarify the ecological adaptability and stable yield of high quality late indica rice, and the relationship between temperature during filling stage and yield and quality of rice. The results showed that with the decrease of latitude, the yield of each variety decreased gradually, the appearance quality and nutritional quality were improved; the amylose content decreased, the peak viscosity, breakdown and pasting temperature were all showed an increasing trend. The yield of high quality late indica rice was mainly affected by the maximum daily temperature at the full heading to maturity stage, the appearance quality of rice was mainly affected by the minimum daily temperature at the full heading to maturity stage, and the amylose content was mainly affected by the minimum daily temperature at full heading to 20 days after the full heading stage. High quality late indica rice planted in the north of Jiangxi Province performed yield advantage, while planted in the south of Jiangxi Province performed quality advantage.