中国食物生产消费系统碳素动态变化及其环境负荷

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Abstract Chinese food production and consumption changes from 1995 to 2016 were analyzed using material flow analysis. Carbon flow and environmental load of food production and consumption were calculated and evaluated. The results showed that the total carbon sequestration and emission of agricultural production system generally showed upward trends, with the growth rate of carbon sequestration obviously higher than that of carbon emission. Livestock-breeding carbon load showed downward trends, while carbon load from agricultural materials input, agricultural activities and food processing and transportation showed increasing trends. Food consumption changes were driving a food carbon consumption transition in which diets of higher in grain carbon consumption were replaced by diets higher in grains, meats and edible oils. The rural residents' average per capita food carbon consumption decreased from 95.24kg/(cap×a) in 1995 to 71.62kg/(cap×a) in 2016, and the urban residents' increased from 52.06kg/(cap×a) in 1995 to 65.16kg/(cap×a) in 2016. The national residents' total food carbon consumption decreased by 6.4% Carbon released from food consumption was mostly emitted into atmosphere environment, followed by soil and water. The proportion of environmental carbon load entered the soil and water showed increasing trend. To reduce the environmental carbon load in China, it was important to both reduce the carbon losses during food production and consumption and increase the recycling rate, such as shifting towards a more environmental-friendly diet, reducing sanitary sewage and kitchen waste discharge, effectively reusing crop, animal and kitchen wastes, and recycling the food wastes.

Key words： material flow carbon sequestration carbon emission carbon consumption environmental load

Received: 21 December 2019

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	REN Jia-feng
	DANG Xin-yi
	YAO Ke-yu
	ZHANG Chen-tao
	XIE Biao

Cite this article:

REN Jia-feng,DANG Xin-yi,YAO Ke-yu等. Carbon dynamics and environmental load of food production and consumption in China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3693-3702.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I8/3693

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