我国粮食增长类型的划分及其特征

根据粮食产量的变化趋势、速度 ,采用定量的方法 ,将中国划分为 5种粮食增长类型 :前减后增型、加速增长型、匀速增长型、减速增长型、前增后减型。它们的形成是粮食播种面积与单位面积产量相互作用的结果 ,双方对比关系的区域差异决定了各种粮食增长类型的特征及空间分布。

Classification and Characteristics of Increasing Types of Grain in China

According to the tendency of Chinese grain output, five increasing types of grain are classified by the quantitative method: type of first decreasing and then increasing, type of quick increasing, type of steady increasing, type of retardant increasing and type of first increasing and then decreasing. The formations of the types are the results of interplay between the sowing acreage and output of unit area. And the characteristics and spatial distribution of each type are determined by the regional differences of contrast between both sides.