卢娜,曲福田,冯淑怡

• 1:南京农业大学公共管理学院

摘要(Abstract)：

为深入了解我国农田生态系统碳净吸收的区域差异及其原因,本文采用重心模型分析了农田系统碳净吸收重心移动规律,运用C-D生产函数分析了影响农田系统碳净吸收重心移动的因素,并在此基础上计算了各影响因素对各区域碳净吸收的贡献率,提出了相应的政策建议。结果表明:①我国农田系统碳净吸收重心坐标经度减小较快,纬度波动增加,落实到地理区域上呈向西北方向移动的趋势。东南区与蒙新区是农田系统碳净吸收比重下降和增长速度最快的地区,而西南区已逐渐成为我国农田系统碳净吸收的主要贡献区。②常规投入中土地投入是影响农田系统碳净吸收重心移动的首要因素,资本投入(包括化肥、劳动力)也是重要的影响因素;控制变量中种植结构是主要影响因素,使用权与收益权变量系数显著但影响不大。③各影响因素对区域碳净吸收的贡献存在显著的地区差异,但影响各区域碳净吸收的主要贡献因素为土地、化肥和种植结构。

关键词(KeyWords)： 农田生态系统;碳净吸收;重心;C-D生产函数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(批准号:70833001,70803019);; 江苏省“青蓝工程”资助

作者(Author): 卢娜,曲福田,冯淑怡

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