The aim of this work was to evaluate the energy flows of a commercial production system of swine deep bed in its finishing phase, located in Juiz de Fora, in the State of Minas Gerais, Brazil. Thus, an energy efficiency study was carried out by monitoring a lot of animals, during a 94-day period. The energy rate of each compound involved in the production process was quantified and the matrixes of energy consumption were determined in the form of animal feeding, electrical energy, piglets, material used as deep bed, human labor, equipment, swine buildings, production of alive swine for slaughter, organic fertilizer production (swine deep bed or swine deep litter). From the direct input energy, 80.57 correspond to animal feeding, 11.90 to pigs for slaughter and 6.76 to piglets, while from the energy output 53.45 correspond to the terminating swine and 46.55 to organic fertilizer (swine deep bed). By the results obtained, we can conclude that such production system has corresponded to an industrial and highly specialized agro ecosystem, importing a great part of the energy consumed in the production process, with 41 of energy efficiency.
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机译：这项工作的目的是评估位于巴西米纳斯吉拉斯州Juiz de Fora的猪深床商业生产系统在其精加工阶段的能量流。因此，在 94 天内通过监测大量动物进行了能源效率研究。对生产过程中涉及的每种化合物的能量率进行量化，并以动物饲养、电能、仔猪、用作深床的材料、人力、设备、猪舍、屠宰活猪的生产、有机肥料生产（猪深床或猪深垫料）的形式确定能耗矩阵。从直接输入能量来看，80.57%对应动物饲养，11.90%对应屠宰猪，6.76%对应仔猪，而从能量输出来看，53.45%对应终止猪，46.55%对应有机肥（猪深床）。根据获得的结果，我们可以得出结论，这种生产系统已经对应于一个工业化和高度专业化的农业生态系统，进口了生产过程中消耗的很大一部分能源，能源效率为41%。
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