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丰宁地处河北北部,属燕山余脉的山区县,1983年以来,该县红果生产取得了很大进展。根据红果对气候条件的基本要求,以六年生红果树株产(效益)为因变量,以影响作物效益的生态条件为自变量,采用多元回归方法,做相关分析和统计检验,以揭示在一定地区内诸生态因子与效益的内在联系和因子间相互关系,从而找出影响作物产量的诸多因子中起关键作用的少数主导因子(即主导适生因素)在此基础上,再进行多元回归分析,用逐步回归直接推导出最优多元回归
Fengning is located in northern Hebei Province, Yanshan Mountains is a mountainous counties since 1983, the county has made great progress in the production of red fruit. According to the basic requirements of climatic conditions, taking 6-year-old tree production (benefit) as the dependent variable and ecological conditions affecting the crop efficiency as independent variables, using multiple regression method, do correlation analysis and statistical test to reveal that in certain The relationship between ecological factors and their benefits and the interrelationship between factors in order to find out the few dominant factors that play key roles in affecting the crop yield (that is, the leading fitness factor), then conduct multiple regression analysis , Using stepwise regression to directly derive the optimal multiple regression