| Emergy analysis of peasant household crop-fruit ecosystem in middle and south Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2008.05.41 |
| Key Words: emergy analysis crop-fruit ecological system household middle and south Loess Plateau |
| Author Name | Affiliation | | WANG Honghong | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WU Faqi | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Rongbiao | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Based on the theory of emergy analysis, taking some peasant households in two villages in the middle and south Loess Plateau respectively as test objects, the energy flow of crop-friut ecosystem was investigated quantitatively. The result showed that the structure of both village's energy system input was similar and the investment of chemical fertilizers made up the largest proportion, while the investment of organic manure was deficient. The net output of crop-fruit ecological system was low and needed to be increased. The environment loading rate was not high as a whole, so attention should be paid to increasing utilization efficiency of renewable environmental resources. The focal point of energy input for crop-fruit ecological system was to raise the level of crop-fruit industry technology and to improve crop-fruit production condition so as to achieve sustainable development of crop-fruit ecological system. |
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