Metabolismo energético e produção de metano em cabras Anglonubiano
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Data
2013-12-19
Autores
Lima, Ana Rebeca de Castro [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O experimento foi conduzido no Laboratório de Estudos em Caprinocultura, UNESP / FCAV, Jaboticabal, SP. Foram utilizadas 15 cabras não lactantes e não gestantes, adultas, da raça Anglo Nubiana. Foram realizados dois estudos. O primeiro foi dividido em duas fases. Na primeira fase os animais foram submetidos à 3 niveis de restrição alimentar, a vontade - SR, restrição moderada - RM (~15% do consumo à vontade), e restrição severa - RS (~40% do consumo à vontade). Na segunda fase, os mesmos animais foram realimentados passando a ser alimentados todos à vontade. No segundo estudo, os animais foram submetidos a dietas com diferentes níveis de volumoso: concentrado (V:C) nas proporções de 25:75, 50:50, e 75:25. No primeiro estudo, durante a Fase 1 (restrição), os animais submetidos ao tratamento RS apresentaram menor consumo de matéria seca (CMS, g/dia) em relação aos animais do tratamento SR e RM. Ao contrário do esperado o CMS dos animais submetidos RM não diferiu daqueles que se alimentavam a vontade. Não houve diferença na digestibilidade da MS, dos nutrientes e da energia na Fase 1 (restrição) e na Fase 2 (realimentação) deste estudo. Já em relação ao balanço energético, a produção de metano (g/dia), na Fase 1 foi maior nos animais que se alimentavam a vontade.Na Fase 1 (restrição), a perda de metano foi 18% e 42% menor para os animais submetidos a RM e RS, respectivamente, em relação aos SR. A EM, EM/ED, qm foram maiores durante a Fase 2 (realimentação), em comparação à Fase 1 (restrição). No segundo estudo, o CMS, consumo de matéria orgânica (MO), proteína bruta e extrato etéreo aumentaram linearmente à medida que a relação V:C diminui. O consumo de fibra em detergente neutro apresentou um comportamento quadrático, aumentando até a proporção de V:C de 50:50 e decrescendo em seguida...
The experiment was conducted in the Laboratory for Research on Goat , UNESP / FCAV , Jaboticabal , SP . 15 non-lactating and non-pregnant, adult , Anglo Nubian goats were used . Two experiments was conducted . The first was divided into two phases. In the first phase the animals were subjected to 3 levels of feed restriction , ad libitum , moderate restriction ( 15 % of ad libitum intake ) , and severe restriction ( 40 % of ad libitum intake ) . In the second phase , the animals were fed back through to be fed all the will . In the second experiment , animals were fed diets with different levels of roughage : concentrate ratios of 25:75 , 50:50 , and 75:25 . For the 1st and 2nd phase due to the treatment , the animals undergoing treatment RS had lower dry matter intake (DMI , g / day ) compared to animals receiving SR and MR . Contrary to expectations CMS animals undergoing moderate restriction does not differ from those fed the will. There was no difference in DM digestibility , nutrients and energy in Phase 1 ( restriction) and Phase 2 ( feedback) of this study . In relation to energy balance , methane production ( g / day) in Phase 1 was higher in animals fed the will . In Phase 1 ( restriction) the energy lost in feces ( kJ / kg BW 0.75 ) of animals undergoing RS was lower compared to animals receiving MR and SR . In Phase 1 ( restriction) , the loss was 18 % methane and 42 % lower for animals undergoing MR and RS . Variables EM, EM / ED , qm were higher during Phase 2 (feedback ) compared to Phase 1 ( restriction) . For the 2nd experiment was no influence of treatments on CMS , CMO , CP and EE which showed a linear behavior increased as the forage: concentrate ratio decreases . The NDF had a quadratic behavior, increasing until the ratio of V : C 50:50 and decreasing thereafter...
The experiment was conducted in the Laboratory for Research on Goat , UNESP / FCAV , Jaboticabal , SP . 15 non-lactating and non-pregnant, adult , Anglo Nubian goats were used . Two experiments was conducted . The first was divided into two phases. In the first phase the animals were subjected to 3 levels of feed restriction , ad libitum , moderate restriction ( 15 % of ad libitum intake ) , and severe restriction ( 40 % of ad libitum intake ) . In the second phase , the animals were fed back through to be fed all the will . In the second experiment , animals were fed diets with different levels of roughage : concentrate ratios of 25:75 , 50:50 , and 75:25 . For the 1st and 2nd phase due to the treatment , the animals undergoing treatment RS had lower dry matter intake (DMI , g / day ) compared to animals receiving SR and MR . Contrary to expectations CMS animals undergoing moderate restriction does not differ from those fed the will. There was no difference in DM digestibility , nutrients and energy in Phase 1 ( restriction) and Phase 2 ( feedback) of this study . In relation to energy balance , methane production ( g / day) in Phase 1 was higher in animals fed the will . In Phase 1 ( restriction) the energy lost in feces ( kJ / kg BW 0.75 ) of animals undergoing RS was lower compared to animals receiving MR and SR . In Phase 1 ( restriction) , the loss was 18 % methane and 42 % lower for animals undergoing MR and RS . Variables EM, EM / ED , qm were higher during Phase 2 (feedback ) compared to Phase 1 ( restriction) . For the 2nd experiment was no influence of treatments on CMS , CMO , CP and EE which showed a linear behavior increased as the forage: concentrate ratio decreases . The NDF had a quadratic behavior, increasing until the ratio of V : C 50:50 and decreasing thereafter...
Descrição
Palavras-chave
Metano, Caprino - Criação, Caprino - Alimentação e rações, Methane
Como citar
LIMA, Ana Rebeca de Castro. Metabolismo energético e produção de metano em cabras Anglonubiano. 2013. xi, 46 f. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, 2013.