BIOENERGETICS OF AN ECOTECHNICAL SYSTEM OF LAYING HEN FARMS

Solar energy, fodder energy, microclimate optimization energy as well as technological process energy were defined as energy flows entering an egg production ecotechnical system. Nutrition biomass, chemical bon d energy (eggs) and dung energy were estimated. Two criteria for energ y consumption assessment were introduced: energy (kJ) consumed per uni t of product and energy (kJ) consumed per unit of energy. Five fowl br eeds were investigated. Restructuring in poultry farming was viewed wi th respect to the introduction of high performance breeds with low val ues of energy consumption. Elimination of systematic stress (abrupt tr ansition of light intensity) reduced energy consumption in egg product ion. Methane fermentation parameters were optimized experimentally und er laboratory conditions using a mathematical model. Dung biogas intro duced an average of 25.75-29.52 MJ per bird into the observed system.