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六十年代以来,我省秋粮(夏播秋粮)生产期间的温度开始发生较明显的变化。变化的特征是,由六十年代之前的偏暖进入偏冷。温度的转折大约是从六十年代中末期开始的,之后出现了序列性的气温下降,主要表现在最热月温度降低、秋季转凉的提前和积温下降。这种变化对秋粮生产产生了较大的影响,近些年我省秋粮生产低而不稳与此有关。为了了解我省整个夏播秋粮地区的温度变化,我们选择曲周、栾城、高阳三县分别代表我省平原南、中、北部,对其建国以来的气象资料进行统计分析,并以温度转折较明显的1969年为界,比较其前后两气候段的温度变化情况。
Since the 1960s, the temperature of autumn grain (summer sown autumn grain) production in our province began to change obviously. The character of the change is that it entered the colder part of the warmer years before the 1960s. The transition in temperature started in the late 1960s, followed by a series of seasonal temperature declines, mainly as a result of a decrease in temperature in the hottest month, an early fall in cool autumn and a decrease in accumulated temperature. This change has a greater impact on the production of autumn grain, in recent years, low and unstable autumn grain production in our province related to this. In order to know the temperature change of autumn sowing area in our province, we choose the three counties of Quzhou, Luancheng and Gaoyang to represent the south, middle and northern parts of the plain of our province respectively, and make a statistical analysis of the meteorological data since the founding of the People’s Republic of China. The more obvious 1969 for the community, compared before and after the two climatic changes in temperature.