采用正交多项式法分析了荆州市历年中稻稻穗分化期和抽穗结实期的气象条件(温度、降水、日照时间 )与中稻产量的关系。结果表明 ,荆州市中稻产量与稻穗分化期的平均气温呈极显著负相关 ,与同期日照时数呈极显著正相关 ,与同期降水量相关不显著 ;与抽穗结实期的平均气温呈极显著负相关 ,与同期日照时数和降水量相关不显著 Orthogonal polynomial method was used to analyze the relationship between the meteorological conditions (temperature, precipitation, sunshine time) and the yield of mid-season rice in the differentiation and heading stages of middle rice in Jingzhou. The results showed that there was a significant negative correlation between the average temperature of mid-season rice and the average temperature of panicle stage in Jingzhou city, which was significantly and positively correlated with the sunshine hours in the same period and not significant with the precipitation in the same period. Negative correlation, and with the same period of sunshine hours and precipitation is not significant