【摘要】 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更多还原

【Abstract】 With orthogonal polynomial the relationship between middle season rice yield and meteorological factors (air temperature,precipitation,sunshine time)during ear differentiation, heading and seeding stage of middle season rice over the years in Jingzhou City was analysed. The results indicated that a very significant negative correlation existed between the rice yield and the average air temperature during ear differentiation and that a very significant positive correlation existed between the yield and the sunshine time at the same period, but no correlation between the yield and the precipitation at the same period.There was also a very significant negative correlation between the yield and the average air temperature during heading and seeding stage,but no correlation existed between the yield and the sunshine time and precipitation at the same period.更多还原