疏花对杂交水稻灌浆期非结构性碳水化合物运转及稻米品质的影响

Effects of Spikelet-removing on Non-structural Carbohydrate Translocation in Filling Stage and Grain Quality of Hybrid Rice

通过疏花处理研究库容大小改变对杂交水稻茎鞘非结构性碳水化合物运转及稻米品质的影响,结果表明,疏花后茎鞘非结构性碳水化合物含量峰值出现时间推迟,抽穗至抽穗后15 d、抽穗至成熟期茎鞘非结构性碳水化合物输出量均降低。与对照相比,疏花后弱势粒灌浆增重速度明显加快,快速增重期出现早。疏花使稻米外观品质明显改善,但对稻米碾磨品质的影响不明显,对蒸煮食味品质的影响因品种而异。

By spikelet-removing treatment, we studied the effects of sink change on the translocation of stem-sheath stored non-structural carbohydrates（NSC） and grain quality of hybrid rice. The results showed that the peak NSC content in stem and sheath appeared later in the treatment of spikelet-removing. Within 15 days after heading or from heading to mature, translocation amount of stem-sheath stored NSC decreased significantly. Compared with the check, filling speed of the inferior grains accelerated significantly and the date of their weight increase appeared earlier. The appearance quality was improved obviously by the spikelet-removing, but its effects on milling quality were not apparent, and the effects on cooking and eating quality varied with varieties.