Abstract:

In order to explore the influence of meteorological factors on the extent of annual yield fluctuations of indica rice, based on the yield data of hybrid midseason indica rice regional area trail in Hubei province from 1990 to 2015 and the data of weather station in Wuhan, Jingzhou and Xiangyang city, the correlation between meteorological elements and the yield fluctuation of hybrid midseason indica rice was analyzed. The results indicated that the meteorological elements from high to low level on the influence of yield fluctuation were accumulative total sunshine hours, cumulative evaporation and mean daily ground temperature from July to August during 1990 to 2015, while other meteorological elements had relatively small influence. The correlation coefficient between the cumulative sunshine hours and the yield was 0.5977, which reached extremely significant level, the partial correlation coefficient of which was 0.6870，it reached the extremely significant level. From July to August during 1990-2015, the cumulative sunshine（X7 → X7 → Y =1.0879）showed directly effect on the yield the largest, which lead to the yield fluctuation of indica rice was 27.0%.

Key words: meteorological element, hybrid midseason rice, yield fluctuation, sunshine hours

摘要：

为探索各气象要素对杂交中籼稻年度间产量波动的影响程度，以1990-2015年湖北省中籼稻区域试验产量资料及武汉、荆州、襄阳气象站的气象资料为依据，分析了各气象要素与杂交中籼稻年度间产量波动的相关性。结果表明，各种气象要素影响产量波动从大到小依次为7-8月累计日照时数、累计蒸发量和日平均地温，其他气象要素的影响相对较小。7-8月累计日照时数与水稻产量间的相关系数为0.5977，达极显著水平；偏相关系数为0.6870，达到极显著水平。7-8月累计日照时数（X7）对产量（Y）有最大的直接正效应（X7→Y=1.0879），可导致杂交中籼稻年度间产量波动幅度为27.0%。

关键词: 气象要素, 中籼稻, 产量波动, 日照时数