Energetic efficiency of a deep bed swine production system

Engenharia Agrícola

Alessandro V. Veloso¹  Alessandro T. Campos²  Vanderson R. De Paula¹  David C. Dourado¹  Tadayuki Yanagi Júnior²  Enilson B. Silva¹ 

[1] ,Universidade Federal de Lavras

关键词: Energy input and output;    swine buildings;    alternative management;    sustainability of biosystems;    Balanço de energia;    instalações para suínos;    manejo alternativo;    sustentabilidade de biossistemas;   

DOI  :  10.1590/S0100-69162012000600008

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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