基于C-D生产函数的湖北省油菜单产影响因素实证分析

Empirical Analyses of the Factors Influencing Output Per Unit Area of Hubei Province Rapeseed by C-D Function

在湖北省的江汉平原、鄂中北和鄂东南三大油菜(Brassica campestris L.)产区分别选取荆州、襄阳和黄冈3市,利用C-D生产函数分析了2002-2011年总化肥用量、机械作业量、种子投入、机械灌溉量、自然灾害发生率及农药用量6个因素对湖北省油菜单产的影响情况。结果表明,这6个影响因素对湖北省油菜单产情况有一定的解释能力,但对湖北省三大产区油菜单产的影响情况并不一致。江汉平原产区油菜单产下降的影响因素主要体现在机械灌溉量上;鄂东南产区油菜单产下降的主要因素来源于总化肥用量;鄂中北油菜单产上升则可能来源于机械作业水平的提高和机械灌溉量的改善等综合因素。其他因素对湖北省油菜单产也有不同程度的影响。

Three cities including Jingzhou,Xiangyang and Huanggang were selected to represent the 3 main rape seed planting areas of Jinaghan plain,middle north and southeast of Hubei province.Six factors including the use of total fertilizer,machines,seeds,irrigation,pesticide and the rate of nature disaster was analyzed by C-D function.The results showed that 6 factors affected the output per unit area of Hubei rape to some extent.The main factor of the decline of output per unit area was the use of irrigation in Jianghan plain of Hubei province while it was the use of fertilizer in southeast of Hubei province.The main factor of the ascend of output per unit area in middle north of Hubei was the use of machine and irrigation.Other factors had some influences on the output per unit area of rapeseed in Hubei province.