摘要
利用正交多项式等多种数学方法对豫东地区冬小麦产量的构成进行了分析，在此基础上用积分回归的方法建立了旬降水量与冬麦产量的回归方程，揭示了不同时期旱涝对产量的影响。根据豫东地区冬小麦生育期内各旬降水量影响系数，分析了该地区旬降水量对冬小麦生产影响的地区差异性。
The construction of output of winter wheat in eastern Henan was analyzed by using the orthogonal polynomial method and the regression equation between the precipitation and the output of wheat was set up by the integral regression method. There is an obvious influence of drought and waterlogging in different periods on the output of wheat. According to the coefficient of influence of precipatation in different growing periods, the regional differentiation was analyzed.
出处
《中国农业气象》
CSCD
1999年第4期10-15,共6页
Chinese Journal of Agrometeorology
关键词
旱涝
正交多项式
冬小麦
产量
影响评估
Drough and waterlogging
Orthogonal polynomial method
Integral regression
Output of winter wheat
Evaluation on influence
