【摘要】 作物产量的气候分析。本文用中山县历年气候资料和水稻产量,采用正交多项式进行摸拟,求得产量时间趋势方程式: 早稻y(X)=157.8+14.4x 晚稻y(x)=252.2+7.6x 气候产量y’t是实际产量yt与趋势产量y(x)之差,即y’t=yt-y(X)。 气候年景分析:丰收年、平产年、欠收年(早晚造累加计)的频率为40.0,10.0、50.0％,其中全年丰收和欠收的频率为16.6、23.3％。欠收年的减产幅度大于丰收的增产幅度。晚稻大于早稻。气候要素日照Q,积温∑~t、降水R与水稻产量的复相关系数达到显著或极显著水准。 分析表明,降水越多、日照越少,水稻产量越低,反之,产量越高。积温越高,早稻产量降低,晚稻产量则越高。反映了中山县南亚热带季风气候与水稻产量的关系。更多还原

【Abstract】 Climatic analysis of the crop yield. The equation of yield trend during the different periods has been calculated, using the yearclimatic data and rice yield by analogue of orthogonal polynomials.early rice y (x) = 157.8 + 14.4xlate rice y (x) = 252.2 + 7.6xThe difference between the real yield and trend yield is the climatic yield :Y’t = Yt- Y (x)Climatic analysis of the harvest condition in the rice yield. The frequency of rich year, common year and poor year is 40.0, 10.0, 50.0%. The frequency of rich harvest and poor harvest in a whol year is 16.6, 23.3%. The reduction margin in poor year is larger than the increasing margin in rich year. The reduction margin of the late rice is larger than the increasing margin of early rice.The coefficient of multiple correlation between the climatic elements-Sun shine Q, Accumlated temperature ∑t and Rainfall R, and rice yield reached remarkable or quite remarkable level.The more the rainfall is, the less the sunshine is and the lower the rice yield. On the contrary, the rice yield is higher. The higher the accunulated tempercture is , the lower the early rice yield is, but the higher the late rice is. This is the relation ship between the monsoon of South sub-tropical area in Zhong Shan county and the rice yield.更多还原