关键词: 组合式气象灾害, 高温, 低温寡照, 杂交水稻, 产量, 品质, 江汉平原

Abstract: In 2020, a typical rice disaster year, continuous sunny and high temperature weather happened in the early and middle August, followed by a long period of low temperature plus sparse sunshine in the middle and late September in Hubei Province. Observing rice yield and quality parameters under such combined disasters was of great significance for the risk control in rice industry. Seven main varieties, including Quanyouhuazhan, Quanliangyouefengsimiao, Y Liangyou No.1, Jingliangyouhuazhan, Zhaoyou 6377, Y Liangyou 900 and Longliangyouhuazhan, were selected in this experiment. They were sowed in two stages and experienced high temperature （C1）, and low temperature and sparse sunlight （C2）. The changes of yield and quality related indexes with sowing date and weather conditions were measured. The results showed that the yield and quality of all varieties were affected to some extents under the conditions of high temperature, and low temperature and sparse sunlight, and different varieties were affected to different degrees. The yield of Quanyouhuazhan and Y Liangyou No.1 under C1 was significantly lower than that under C2, the yield of Y Liangyou 900 under C1 was significantly higher than that under C2 （P<0.05）, and there was no significant difference in other varieties between the two sowing treatments. As for the quality indexes, compared with C1, the quality indexes such as head rice rate, chalkiness degree and chalkiness rate of most varieties decreased significantly under the C2 sowing period. By comparing the yield and quality performance of related varieties under normal weather conditions, it was concluded that Quanliangyouefengsimiao, Jingliangyouhuazhan, Zhaoyou 6377 and Longliangyouhuazhan had good tolerance to high temperature, and low temperature and sparse sunlight. Quanhuayouzhan and Y Liangyou 900 were sensitive to both high temperature, and low temperature and sparse sunlight. Combined meteorological disasters had their own characteristics according to their types, and the harm of low temperature and sparse sunlight disasters might exceed the harm of high temperature heat damage.

Key words: combined meteorological disasters, high temperature, low temperature and sparse sunlight, hybrid rice, yield, quality, Jianghan Plain