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Níveis de valina digestível para suínos machos castrados dos 15 aos 30 kg

Authors: Lohmann, A.C.; Pozza, P.C.; Pozza, M.S. dos S.; Nunes, R.V.; Castilha, L.D.; Possamai, M.; Bruno, L.D.G.; +1 Authors

Níveis de valina digestível para suínos machos castrados dos 15 aos 30 kg

Abstract

O objetivo deste trabalho foi o de avaliar níveis de valina digestível para suínos machos castrados, dos 15 aos 30 kg de peso. No primeiro experimento, para determinação do balanço de nitrogênio, foram utilizados 20 suínos, machos castrados, com peso inicial de 22,88±1,19 kg, distribuídos individualmente em gaiolas de metabolismo, em delineamento experimental de blocos ao acaso, constituído de cinco tratamentos (0,60; 0,67; 0,74; 0,81 e 0,88% de valina digestível) e quatro repetições. No segundo experimento, de desempenho, foram utilizados 40 suínos, machos castrados, com peso inicial de 15,49±0,06 kg, submetidos aos mesmos tratamentos, repetições e delineamento experimental utilizados no primeiro experimento. A relação N retido:N absorvido apresentou resposta quadrática, indicando um nível ótimo de valina digestível de 0,748%. A excreção total de N apresentou efeito quadrático em função dos níveis de valina digestíveis, sendo reduzida até o nível de 0,730% de valina digestível e a partir deste nível a excreção de N aumentou novamente. A eficiência de utilização de valina, para ganho de peso reduziu de forma linear à medida que aumentaram os níveis de valina digestível nas rações, e ao utilizar o modelo linear response plateou obteve-se a redução deste parâmetro até 0,790% de valina digestível. Conclui-se que o nível de 0,748% de valina digestível foi o mais adequado, ao se considerar o N retido: N absorvido, para suínos machos castrados dos 15 aos 30 kg de peso.

Keywords

Aminoácidos de cadeia ramificada, Metabolismo do nitrogênio, Performance, Branched chain amino acids, Nitrogen metabolism, Desempenho

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
Green
gold