基于相图法的河北省农业生态经济系统可持续发展对策研究

doi:10.11934/j.issn.1673-4831.2018.12.003

Abstract

Abstract:

As a major agricultural province, Hebei provides an important guarantee of food security for Beijing-Tianjin-Hebei region. However, due to overexploitation of groundwater and excessive application of pesticide and chemical fertilizer, the agricultural production process in Hebei has caused a series of environmental problems, which in return restrain the system from sustainable development. Data of input resources were collected for Hebei Province's agricultural eco-economic system during 2001-2016. Emergy theory and ternary diagram were combined to analyze resource allocation and its tendency of system input and optimize development path of the system. The results showed that the allocation of system input resources gradually changed. Specifically, the renewable emergy utilization ratio for the system gradually decreased and the rate of non-renewable environmental resource utilization also decreased, while the ratio of purchased non-renewable emergy input gradually increased. The changes in resource allocation indicated that the system became less dependent on the local environment, but the dependence of system on the external emergy input was gradually enhanced. Moreover, the increasing of emergy investment rate suggested that agricultural production process should consume more purchased emergy while using the same amount of local resources. The ratio of renewable resources to non-renewable resources kept as 1.71:1 showed that the input of renewable resources was higher than that of non-renewable resources, indicating that Hebei Province has sound natural environment and climatic resources. However, the emergy sustainability index (ESI) values during the study period were lower than 1 with a yearly decrease, which means the system was not sustainable in the long run. According to system tendency analysis, comprehensive measures should be taken to keep stable the ratio of non-renewable resource emergy to purchased emergy and to increase the input of renewable resources in order to realize sustainable development of agricultural eco-economic system in Hebei Province.

Key words: Hebei Province, agricultural eco-economic system, ternary diagram, emergy, sustainable development

CLC Number:

X22
F323.2

ZHOU Shu-mei, HAN Jing-yuan, LIU Li-jun. Countermeasures of Sustainable Development for Agricultural Eco-Economic System in Hebei Province Based on Ternary Diagram[J]. Journal of Ecology and Rural Environment, 2018, 34(12): 1074-1081.

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Countermeasures of Sustainable Development for Agricultural Eco-Economic System in Hebei Province Based on Ternary Diagram

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