中国粮食增产影响因素的实证分析

影响粮食增产的因素众多,选取粮食总产量、粮食播种面积、化肥投入、粮食播种成灾率、粮食灌溉面积以及农业机械投入为变量,运用经典的Cobb-Douglass函数测算了各影响因素对粮食增产的贡献.结果表明,化肥投入增加、成灾面积减少、农业机械投入增加对粮食增产起到了重要的贡献作用;此外,国家宏观政策也对粮食生产产生了重大影响,退耕还林政策改善了生态环境和农业生产条件,粮食补贴政策直接增加了农民收入,并提高了农民生产粮食的积极性.

Empirical Study of Factors Influencing the Yield Increase of Grain in China

There were many factors influencing yield increase of grain.Choosing total grain output,grain planting area,fertilizer input,proportion of area affected by natural disasters to total planting area,,irrigated areas and agricultural mechanization input as variables,this article estimates the contributions made by factors to the yield increase.The results showed that increase in fertilizer input and mechanization input and decrease in areas affected by natural disasters played an important role in increasing g...