| Emergy and benefit evaluation of “pig-methane-pomegranate” recycling agriculture in Guanzhong Plain |
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| DOI：10.7606/j.issn.1000-7601.2017.04.30 |
| Key Words: farmers type recycling agriculture emergy analysis economic benefit |
| Author Name | Affiliation | | SUN Lu | Shaanxi Land Construction Group, Xi’an, Shaanxi 710075, China
College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | HAN Ji-chang | Shaanxi Land Construction Group, Xi’an, Shaanxi 710075, China | | WU Fa-qi | College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| To explore the advantage of “pig-methane-pomegranate (PMP)” recycling agriculture mode, we analyzed the emergy flow characteristics, structure and comprehensive benefits of three modes of PMP using the single pomegranate planting mode (mode II) and single pig breeding (mode III) as references. The results show that output-input ratio of model I was 8.49, higher than that of mode III while next to mode II. Emengy feedback ratio of model I was the minimum value of 0.010. The Environmental loading ratio of model I was the lowest, decreased by 1.647 and 0.530 compared with mode II and mode III, respectively. Emergy waste ratio of model I was the lowest among the three modes. Emergy index for sustainable development of model I had the best performance, increased by 9.823 and 8.830, respectively. Compared to the single agricultural mode, economic input-output ratio of all subsystems of model I increased at various degrees. In summary, model I had the high resource-using rate, low emission, low environment pressure, high sustainable development potential, high ecological and economic benefits. |
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