Emergy and greenhouse gas assessment of a sustainable, integrated agricultural model (SIAM) for plant, animal and biogas production: analysis of the ecological recycle of wastes.
Emergy and greenhouse gas assessment of a sustainable, integrated agricultural model (SIAM) for plant, animal and biogas production: analysis of the ecological recycle of wastes.
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DOI：
10.1016/j.resconrec.2015.01.010
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发表时间：
2015-03
影响因子：
13.2
通讯作者：
Xihui Wu;Faqi Wu;X. Tong;Jia Wu;Lu Sun;Xiaoyu Peng
中科院分区：
文献类型：
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作者：
Xihui Wu;Faqi Wu;X. Tong;Jia Wu;Lu Sun;Xiaoyu Peng
生态循环农业代表着新型农业发展方式，在中国正在得到越来越多的应用。这种耕作方法是通过在农业资源的利用中发展往复、多层次、高效的能源和物质流来驱动的。在本研究中，通过考虑每种投入的部分可再生性因素，使用能值方法评估了由多个子系统（核桃和谷物、生猪和家禽以及沼气）组成的中国西北地区的综合农业模式。通过分析回收结构，量化了综合模型的回收效益比、温室气体减排强度和常规能值指数。与传统生产模式相比，这种农业生产模式从回收中获得了巨大的效益，并且温室气体净排放减排潜力为 94,174.28 千克二氧化碳当量/年。例如，尽管环境负荷较高，可持续性较差，但与当地传统玉米生产体系相比，综合模式提高了资源和土地利用效率、环境绩效、单位面积产量和可持续性。使用有机玉米等可再生材料代替传统玉米提供了提高综合生产系统可持续性的替代方法，但经济效益却大幅下降。
The use of ecological recycling in agriculture represents a new type of agricultural development that is coming into increasing use in China. This approach to cultivation is driven by developing reciprocating, multilevel, high-efficiency energy and material flows in the use of agricultural resources. In the present study, the emergy method was used to assess an integrated agricultural model in Northwest China consisting of multiple subsystems (walnut and grains; pigs and poultry; and biogas) by considering the partial renewability factor of each input. The recycle benefit ratio, greenhouse gas emission mitigation intensity, and conventional emergy indices of the integrated model were quantified by analyzing the structure of recycling. This model for agricultural production achieved great benefits from recycling and a net greenhouse gas emission mitigation potential of 94,174.28 kg CO2-eq/yr compared to conventional production models. For example, the integrated model had improved resource and land use efficiencies, environmental performance, output per unit area, and sustainability compared to the local conventional corn production system, despite its relatively high environmental load and poor sustainability. Using renewable materials such as organic corn in place of conventional corn provides an alternative way of improving the sustainability of the integrated production system but with a considerable decrease in economic profitability.