Emergy analysis of eco-economic system of planting in Hebei province
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Received
Revised
Published
2009-03-20
2009-04-21
2009-08-05
Issue Date
2009-08-05
Abstract
Abstract:The analysis of emergy input and output of eco-economic system of planting in Hebei province in 2007 was conducted by using emergy analysis method. It showed that, the total emergy input and output of planting were 7.97×1022sej and 3.24×1022sej respectively. Of the total emergy input, unrenewable industrial emergy was 52.9%, and renewable emergy was 47.1% which including 20.9% of renewable environment resource and 26.1% of renewable organic emergy. The ratio of emergy and money, net emergy ratio, load ratio of environment, and sustainable development index were 1.98×1011sej.yuan-1, 0.51, 1.13, and 0.45, respectively. Return from planting was low in general, and the emergy output of the main crops was maize > wheat > sorghum > legume > peanut.
Emergy analysis of eco-economic system of planting in Hebei province. Chinese Agricultural Science Bulletin. 2009, 25(15): 0 https://doi.org/10.11924/j.issn.1000-6850.2009-0566