Grape marc as alternative ingredient in feeding of growing rabbits

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This study aimed to evaluate the effects of inclusion of grape pomace as a replacement for alfalfa hay on performance, carcass yield and morpho hitological parameters of the gastrointestinal tract of rabbits during the growth phase. A total of 30 rabbits of New Zealand White equally divided into three treatments: experimental compounds by standard diet (without inclusion of grape pomace), and the diets with 25% and 50% replacement of alfalfa by grape pomace in the respective experimental diets. The inclusion of grape pomace caused a linear increase in total feed intake and weight gain. The presence in a greater proportion of essential fatty acids in treatment with Omega3 and omega6 T25BU and T50BU best responses promoted husbandry, since these nutrients act positively in the homeostatic equilibrium. The morphohistological results showed that the height of the intestinal villi cecum increased with the inclusion of dietary grape pomace, showing a positive correlation. The inclusion of grape pomace in diets for rabbits in the growth phase alters their performance, increasing the total feed intake and weight gain. It also showed that increasing this co-product improves the morphology of the cecum intestinal villi.

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Avaliaram-se os efeitos de dietas simplificadas à base de forragens sobre a digestibilidade aparente dos nutrientes em coelhos Nova Zelândia branco. As dietas experimentais foram: referência (REF), feno de alfafa (FAL), feno das folhas de rami (FRA), feno das folhas de amoreira (FAM) e feno do terço superior da rama da mandioca (FMA). A digestibilidade das dietas foi influenciada pelo tipo de alimento estudado; a FMA apresentou coeficientes de digestibilidade inferiores às demais dietas para todos os princípios nutritivos analisados. Para a dieta FAM, os coeficientes de digestibilidade aparente dos princípios nutritivos foram maiores (P<0,05) que os coeficientes das outras dietas estudadas. Os animais que ingeriram a dieta FAM apresentaram distúrbios digestivos e baixos consumos, com efeito negativo sobre os resultados. Os coeficientes de digestibilidade aparente das demais dietas estudadas foram semelhantes (P>0,05). Os valores estimados de energia digestível (kcal ED/kg MS) e proteína digestível (%PD/MS) foram, respectivamente, para o feno de alfafa: 2285,27 e 16,04; feno das folhas de rami: 1857,88 e 16,37; feno das folhas de amoreira: 2838,48 e 15,12 e feno do terço superior da mandioca: 2155,55 e 10,57.