2.3 Spesiell del
2.3.3 Forbudet mot dobbel straffeforfølgning
O aumento do peso relativo do estômago vazio que foi observado com a inclusão de cenoura pode dever-se à quantidade de alimento ingerida. Embora não seja significativo, podemos observar no quadro 2 que os regimes com cenoura apresentaram quantidades ingeridas ligeiramente superiores independentemente do seu teor de NDF (116,5g e 91,8g vs 122,1g e 95,3g).
O valor maior de pH cecal dos animais alimentados com regimes sem cenoura revela características fermentativas cecais distintas. Um pH menor pode trazer vantagens ao nível da diminuição do número de agentes patogénicos presentes na flora intestinal. Contudo os valores de pH estomacal e cecal estão dentro dos intervalos considerados normais (1,0 – 5,0 no estômago, predominando entre 1,0 – 2,0 e, 5,5 – 6,0 no ceco (Pinheiro e Mourão, 2006)), embora se verifique, como já foi dito anteriormente um ligeiro acréscimo no pH do ceco dos animais que foram alimentados com os regimes sem cenoura.
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A tendência para o aumento do peso do estômago cheio que se observou nos animais alimentados com os regimes ricos em fibra deve-se muito provavelmente às quantidades ingeridas destes regimes serem superiores.
O peso relativo do ceco vazio foi menor nos animais alimentados com os regimes mais ricos em NDF o que pode ter sido devido ao facto do trânsito intestinal ser mais rápido nos animais alimentados com regimes de teor fibroso superior.
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6 – Conclusões
Com base no nosso trabalho experimental podemos concluir que a cenoura pode ser utilizada como um alimento alternativo na alimentação animal, embora, neste caso, não tenha revelado provocar efeitos positivos nos índices produtivos dos animais nem amenizado os problemas intestinais dos animais.
O teor de fibra mais elevado teve um efeito negativo sobre a digestibilidade global do alimento e sobre o índice de conversão, como seria de esperar de acordo com a bibliografia estudada.
Será de todo o interesse no futuro estudar mais exaustivamente o efeito de regulação intestinal da cenoura em conjunto com vários teores de fibra, recorrendo a um número muito superior de coelhos, com o objectivo de ser possível minimizar os problemas digestivos dos coelhos no período do pós-desmame.
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