我国饮食结构变化对农业温室气体排放的影响

从食物消费端入手,研究饮食结构变化对农业温室气体排放的影响.研究显示我国食物消费呈现出动物性食物替代粮食消费的趋势,动物性食物的温室气体排放系数是植物性食物的7倍以上.1990~2010年人均食物消费相关的温室气体排放增长了39%,肉类消费已成为食物消费中最大的温室气体排放来源,且还将持续增长.当我国人均收入达到2010年美国水平时,世界平均肉类消费水平、高肉类消费水平、低肉类消费水平和营养均衡消费水平四种情景下,人均肉类消费的温室气体排放将比2010年分别增长47.8%、119.9%、4.8%、-29.6%.我国食物消费应当提倡在保障均衡营养摄入的前提下,适当减少肉类消费,达到温室气体减排、资源节约、污染减排的协同效应.

Impact of diet structure change on agricultural greenhouse gas emissions in China

Agricultural greenhouse gas emission caused by diet structure change was researched based on food consumption in this paper. Research stated that grain consumption was gradually replaced by animal-based food consumption in China, which was 7times greenhouse gas emission than plant-based food. The greenhouse gas emission related to average food consumption in 2010 increased 39% compared with that in 1990. Meat consumption has become the major source of greenhouse gas emission, and will increase constantly in future. Scenarios were set as world average, high, low meat consumption and balanced diet when income per person in China increased to that of USA in 2010. Greenhouse gas emission caused by meat consumption per person will increase by 47.8%, 119.9%, 4.8% and -29.6%, respectively. Research suggested that meat consumption should be decreased under the circumstance that balanced nutrients were guaranteed. At that time, co-benefit of greenhouse gas emission, resource saving and pollution reduction will be achieved.