【摘要】 [目的]研究温度对优质食味籼稻产量及品质的影响。[方法]以20份耐热性较强和8份耐热性一般的优质籼稻为试验材料，设置4个播期分析不同播期的产量及稻米品质指标变化情况。[结果]随着播期的延迟，籼稻的株高呈现下降趋势；耐热性较强群体始穗后10 d的温度与每穗实粒数和结实率均达到显著负相关；米粒变长、米粒长宽比变大的趋势较为明显，碱消值、胶稠度也呈现下降趋势。随着播期推迟直链淀粉含量在耐热性较强群体中呈现增加的趋势，在耐热性一般群体中呈现波动，但差异不大。粒长、整精米率、碱消值与始穗后温度均达极显著负相关。直链淀粉含量在耐热性较强群体中与始穗后温度呈现极显著负相关，在耐热性一般群体中与始穗后温度不相关。因此，优质籼稻在安徽江淮地区种植建议安排在8月底或9月初抽穗。播种选择碱消值6级以上，并且直链淀粉含量在16%～18%的品种，对温度反应相对较迟钝，有利于改善食味品质。更多还原

【Abstract】 [Objective]To study the impact of temperature on the yield and quality of high-quality indica rice.[Method] 20 heat-resistant and 8 heat-sensitive indica rice varieties were used as experimental materials.Four sowing dates were set to analyze the changes in yield and rice quality indicators.[Result]The results showed that with delayed sowing, the plant height decreased; in the heat-resistant group, the temperature during the first 10 days after heading was significantly negatively correlated with both the number of grains per spike and the grain filling rate.There was a noticeable trend of increasing grain length and length-to-width ratio, while alkali spreading value and gel consistency also decrea-sed.With delayed sowing, the amylose content showed an increasing trend in the heat-resistant group, while it fluctuated in the heat-sensitive group, with little difference.Grain length, milled rice rate, and alkali spreading value were all significantly negatively correlated with the temperature after heading.In the heat-resistant group, amylose content was significantly negatively correlated with the temperature after heading, whereas in the heat-sensitive group, there was no significant correlation.[Conclusion]For cultivating high-quality indica rice in the Jianghuai region of Anhui, it is recommended to arrange for heading in late August or early September.Varieties with an alkali spreading value of grade 6 or above and amylose content between 16% and 18% respond relatively slowly to temperature changes, which is beneficial for improving eating quality.更多还原