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以北京市消耗食物生态足迹的距离为研究核心。结果表明2008年至2012年,北京的生态足迹距离、人均生态足迹和生态足迹总里程总体呈现逐年增长趋势:生态足迹距离增大到676.75 km,增长19.3%;人均生态足迹距离增加到18.42万km,增长54%;生态足迹总里程增加了1倍强,达到56亿t km。北京市的食物生态足迹距离不断扩大,并涵盖了全国大部分地区,北京城市化的生态成本上升。所消耗各类食物的生态足迹距离从大到小分别为水果类、蔬菜或粮油类、肉蛋类和水产类。蔬菜类和水果类的生态足迹距离存在明显的季节波动,且冬春季节远高于夏秋季节。从转移生态承载力来源地的视角,直线距离越远、占据市场份额越大的地区,对北京市消耗食物生态足迹距离的贡献率越高。
Taking the distance between consumption of food ecological footprint in Beijing as the research center. The results show that from 2008 to 2012, the total ecological footprint, per capita ecological footprint and total ecological footprint in Beijing show a trend of increasing year by year: the ecological footprint increases to 676.75 km, an increase of 19.3%; the per capita ecological footprint increases to 184,200 km , An increase of 54%; total footprint of ecological footprint increased by 1 times to 5.6 billion t km. The food ecological footprint in Beijing has been expanding and covering most parts of the country. The ecological cost of urbanization in Beijing has risen. The consumption of various types of food from the ecological footprint of large to small, respectively, for the fruit, vegetable or grain and oil, meat and eggs and aquatic products. There are obvious seasonal fluctuations in the ecological footprint of vegetables and fruits, which are much higher in winter and spring than in summer and autumn. From the perspective of the transfer of ecological carrying capacity, the farther the linear distance is, the larger the market share is and the higher the contribution to the ecological footprint of food consumption in Beijing.