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本研究利用粮食产量、降水、平均相对湿度、极端气温、平均气温等数据对潍坊市的粮食产量的影响因素进行了分析。通过主成分分析等方法得出,1975年以前粮食产量增长速度较慢,1975年之后增速较快,一方面是由于降水较多,极端气温频发,导致产量增长较慢;另一方面,1975年之后平均气温升高,极端温度相对频率降低,热量提高,粮食增产迅速。除了气候变化以外的因素就是,改革开放之后经济发展迅速,科技发展、新型农药化肥的研发以及人口的流动带动粮食产量的增长。总之,粮食产量的变化受多种因素的影响,而气候条件是最根本、最直接的影响因素。
In this study, we used the data of grain yield, precipitation, average relative humidity, extreme temperature and average air temperature to analyze the influencing factors of grain yield in Weifang. Through principal component analysis and other methods, it is concluded that before 1975, the output of grain was slow to increase and the growth rate was relatively high after 1975, due to the precipitation and frequent extreme temperature on the one hand, which led to the slow growth of output. On the other hand, After 1975, the average temperature increased, the relative frequency of extreme temperature decreased, the heat increased, and the grain output increased rapidly. In addition to climate change, the factors other than climate change are: the rapid economic development after reform and opening up, the development of science and technology, the research and development of new pesticides and fertilizers, and the population flow drive the growth of grain output. In short, changes in food production are affected by many factors, and climatic conditions are the most fundamental and most direct influencing factors.