关键词: 水稻, 冠层温度, 土壤水分, 产量结构

Abstract: The canopy temperature of rice at the flowering stage and the soil water content were investigated under different soil water treatments. It showed that the canopy temperature was lower than the air temperature, while the soil water content significantly influenced the canopy temperature, the lower the soil water content, the higher the canopy temperature, the less the accumulative absolute value of canopy-air temperature difference. Moreover, the maximum difference between treatments and CK in the accumulative absolute value of canopy-air temperature appeared at 13:00 pm, therefore, it could be considered as a suitable measuring time. It was noted that the peak flowering time of rice was ahead under the lowest water content treatment, and the peak flowering time was concentrated on the first three days, resulting in shortened and lightened the panicle of rice. As to the CK and the high water content treatments, the peak flowering time was concentrated at the middle of flowering duration, with longer panicle length and higher panicle weight. The results indicated the lower the soil water content, the less the full filled grain number.

Key words: rice, canopy temperature, soil water content, yield components