Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/4198
Título: Influência do processo de mistura na composição física e química do alimento único para vacas leiteiras
Autor: Lopes, Ana Rita Martins Filipe
Orientador: Freire, João Pedro Bengala
Castanheira, António
Palavras-chave: mixing process
total mixed ration
particle size
NDF content
dry matter
Data de Defesa: 2011
Editora: ISA/UTL
Citação: Lopes, Ana Rita Martins Filipe - Influência do processo de mistura na composição física e química do alimento único para vacas leiteiras. Lisboa: ISA, 2011
Resumo: This work was developed to study the influences of the mixing process in the physical and chemical composition of the TMR for dairy cows. Three mixing processes were studied: the “Control”, characterized by keeping the parameters already used on the dairy farm, particularly the order of entry in the blender and the beginning of the mixture (ration, hay – starting mixture, silage and water), the “Process A”, which changed the beginning of the mix for the moment it enters the silage, maintaining the order of entry described above, and “Process B”, which changes the order of entry in the blender (ration, silage – starting mixture, hay and water). The particle size of the mixture was analyzed by the “Penn Separator” method, the chemical composition (CP, Lipids, Starch, CF, NDF, ADF and Ash) by the NIRS and the dry matter content in an oven. The particle size parameters and NDF content were not appropriate in any of the mixing processes, but “Process A” proved to be the most beneficial, not worsening the particle size and allowing the saving of time and possibly of fuel. In all processes the dry matter content was adequate and uniform, which shows that the mixing times were correct.
Descrição: Mestrado em Engenharia Zootécnica - Produção Animal - Instituto Superior de Agronomia / Faculdade de Medicina Veterinária
URI: http://hdl.handle.net/10400.5/4198
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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