丹东市粮食产量结构及其与气象条件的关系分析

Analysis of Grain Yield Structure and Its Relationship with Meteorological Factors in Dandong City

为研究丹东市粮食产量与气候的关系,对1985—2016年丹东市粮食产量结构、粮食产量与气象要素的关系进行分析。结果表明,丹东市粮食总产的波动主要受作物种植结构的调整和粮食作物平均产量波动的影响;1985年以来,粮食作物总产和面积均有所增加,其中水稻播种面积和总产百分比变化不大,玉米则均呈增加趋势;影响丹东市粮食产量丰歉的主要气象因子为7月、8月的平均气温,5月、6月、8月的降水量以及5月、8月的日照时数。

In order to study the relationship between the grain yield and the climate in Dandong City,the grain yield structure in Dandong from 1985 to 2016 and the correlation between the grain yield and the meteorological factor were analyzed. The results showed that, the fluctuation of the total grain yield in Dandong City mainly depended on the fluctuation of the mean grain yield per unit area and the adjustment of the crop planting structure ; Since 1985 ,both of the total yield and the planting area of grain crops increased ,while the planting area of rice and its percentage of total grain yield changed slightly,and the maize showed an increasing tendency;the main meteorological factors that affected the grain yield in Dandong City were the mean air temperature in July and August ,the precipitation in May ,June and August ,and the sunshine duration in May and August.