省际粮食贸易隐含污染与环境比较优势研究

Embodied pollution and environmental comparative advantage of China’s inter-provincial grain trade

为协调粮食生产、贸易与面源污染的矛盾,实现绿色农业发展、区域间利益共赢,在测算省际粮食贸易量的基础上,运用灰水足迹方法计算各省隐含氮污染和污染强度,构建了粮食贸易隐含氮污染网络,解析了省际粮食生产隐含氮污染的环境比较优势。结果表明:中国省际粮食贸易网络格局由“条块式”转向“团块式”,贸易集中化趋势明显;省际粮食贸易隐含污染和污染强度呈下降趋势,但地区差异明显加剧了环境不公平;环境比较优势网络表现出“两头小,中间大”的橄榄形分布,环境比较优势最小的地区集中在华北地区,最大为黑龙江。

In order to coordinate the contradiction between grain production,trade and non-point source pollution,and to achieve green agricultural development and regional win-win interests,based on the calculation of inter-provincial grain trade volume,this paper uses grey water footprint method to calculate inter-provincial nitrogen pollution and pollution intensity,and constructs the environmental comparative advantage network of food trade nitrogen pollution.The results show that the pattern of China’s inter-provincial grain trade network has changed from“strip”to“cluster”,and the trend of trade centralization is obvious.The implied pollution and pollution intensity of inter-provincial grain trade showed a decreasing trend,but regional differences significantly aggravated environmental inequality.The network of inter-provincial environmental comparative advantage showed an olive pattern of“small at both ends and large in the middle”.The regions with the smallest environmental comparative advantage were concentrated in North China,and the largest was Heilongjiang.