Emergy evaluation of agricultural sustainability of Northwest China before and after the grain-for-green policy

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	Emergy evaluation of agricultural sustainability of Northwest China before and after the grain-for-green policy
	Wang Xiuhong
	2014
关键词	Grain (agricultural product) Agriculture Food supply Sustainable development
英文摘要	China's grain-for-green policy (GFGP) was implemented with the goal of improving ecological security. Consequently, agricultural energy and agrochemical inputs have been significantly increased to improve food security and to increase the income of farmers in the regions where the GFGP was implemented. In analysis of the sustainability of the agricultural system affected by the GFGP, it is essential to consider both economic profitability and environmental sustainability. Using Yanchi County as a case study area, this study used an emergy synthesis to examine the sustainability of the agricultural system before and after the GFGP in Northwest China. We found that the total emergy input and energy output of the agricultural system in the study area increased from 1991 to 2008; however, the sustainability of the system declined, and this decline was especially evident after the GFGP was launched in 2001. Increasing inputs of non-renewable purchased resources will not only reduce the effectiveness of the GFGP in Northwest China, but also hinder the implementation of the energy-saving and emission-reduction policy that China launched in 2005. We suggest that sustainable agricultural development in Northwest China should be based on effective use of renewable resources and development of a low-carbon agricultural economy. 2014 Elsevier Ltd.
出处	Energy Policy
卷	67 页:508-516
收录类别	EI
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31401]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wang Xiuhong. Emergy evaluation of agricultural sustainability of Northwest China before and after the grain-for-green policy. 2014.