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[1]GUO Lina,ZHANG Menghua,WANG Hainan.Evaluation of Agricultural Ecosystems in Tangshan City Based on Energy Theory[J].Research of Soil and Water Conservation,2017,24(02):300-306,313.

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Evaluation of Agricultural Ecosystems in Tangshan City Based on Energy Theory

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 02 Page number: 300-306,313 Column: Public date: 2017-04-28

Title:: Evaluation of Agricultural Ecosystems in Tangshan City Based on Energy Theory

Author(s):: GUO Lina¹, ZHANG Menghua¹, WANG Hainan²; 1. College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063009, China;
2. School of Public Finance and Taxation, Capital University of Economics and Business, Beijing 100070, China

Keywords:: agricultural ecosystems; energy theory; sustainable development; Tangshan City

CLC:: F323.22;S181

DOI:: -

Abstract:: Agricultural ecosystem is a basic system for human to live. The agricultural ecosystems of Tangshan City were studied to better evaluate the operation status and development characteristics of regional agricultural ecosystem, and understand the relationship between the regional resources, environment and economy. The quantitative evaluation of energy input and output, energy self-sufficient ratio (ESR), energy yield ratio (EYR), energy per person (EPP), environment loading ratio (ELR) and energy sustainability index (ESI) were investigated by compiling the system of energy evaluation index based on the theory and methodology of energy. The results showed that the overall operation of agricultural ecosystems of Tangshan City was poor, which was consumer-based economy system, and the sustainable development needed to be improved. The unrenewable industry supplemental energy inputs represented by the agricultural consumption of electricity, mechanical power, diesel oil and chemical fertilizer had been increasing year by year, which led to the energy yield ratio and energy sustainability index of agricultural ecosystem to have the downward trend, and caused the environment loading ratio to rise. These results suggest that ecological agriculture and modern agriculture should be developed in Tangshan City, and focus on expanding agricultural versatility. Additionally, in order to promote the sustainable development of agricultural ecosystem, it is essential to change the mode of traditional agricultural production gradually, to highlight the connotation of ecological agriculture, and to change the energy input and output structure.

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