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• W2911702963 abstract "espanolLa melaza de cana (CM) se considera una alternativa a los cereales y reduce el costo de las dietas. Sin embargo, niveles hasta 20 % de la dieta total para reemplazar de cereales en la dieta de cerdos puede reducir el crecimiento, debido al valor bajo de energia metab olica de la CM, junto con la incapacidad de los cerdos para aumentar su consumo de alimento para mantener el consumo de energia metabolizable y de proteina. El objetivo de este estudio fue evaluar el efecto de niveles de CM y proteina sobre el uso del nitrogeno (N) en dietas para crecimiento y finalizacion de cerdos en engorda. La hipotesis fue que los niveles altos de CM con el balance adecuado de aminoacidos , no afectan el balance del N en cerdos en cre - cimiento y finalizacion. Un experimento con seis cerdos en crecimiento (20-50 kg peso corporal) y otro con seis cerdos en finalizacion (50-100 kg peso corporal) se realizaron para evaluar los efectos del aumento en la dieta de CM (0, 10 y 20 %) sobre el balance de N. Cada experimento se realizo en un diseno de Cuadro Latino 3  3, con tres tratamientos y seis repeticiones para cada uno. En el primer experimento, los cerdos en crecimiento alimentados con 20 % de CM en la dieta tuvieron un mayor consumo de alimento y de N, pero menos N retenido que aquellos alimentados con 0 a 10 % (p  0.05). En los cerdos en finalizacion, los valores mayores de consumo de alimento, N y la perdida total de N fueron para dietas de 10 y 20 % de CM, comparados con las dietas sin CM. El N retenido disminuyo en forma lineal al aumentar el porcentaje de CM en la dieta. En el segundo experimento se probo el balance de N en cerdos de finalizacion alimentados con dietas basales, con 0 y 20 % de CM y 10, 12 y 14 % de proteina cruda (PC), balanceadas para lisina. El consumo, retencion y excreta del N aumentaron con el aumento de la CP en la dieta. Aunque, la CM aumento el consumo de N, no cambiaron las excretas de N fecal, ni en orina, ni su retencion. La inclusion de CM en la dieta redujo la eficiencia de uso del N de los cerdos en crecimiento y finalizacion. Sin embargo, los efectos indeseables de la CM al 20 % en el balance del N no se observaron cuando las dietas se formularon con un patron ideal de aminoacidos en la proteina para cerdos en finalizacion. Por tanto, la inclusion de CM en las dietas para cerdos en crecimiento y finalizacion, deberia considerar un balance de aminoacidos que mantenga el uso adecuado del N. EnglishCane molasses (CM) are considered an alternative for cereals and reduce cost of diets. However, adding levels up 20 % of total diet to replace cereals of the diet of pigs could reduce growth performance because of the low metabolizable energy value of the CM, coupled with failure of the pigs to increase feed consumption to maintain metabolizable energy and protein intake. The objective of this study was to evaluate the effects of diets with CM and protein levels on the use of dietary nitrogen (N) in growing and finishing pigs. The hypothesis was that high levels of CM with an appropriate balance of amino acids do not affect N balance in growing and finishing pigs. One trial with six growing pigs (20-50 kg body weight) and other with six finishing pigs (50-100 kg body weight) were conducted to evaluate the effects of increasing dietary CM (0, 10 and 20 %) on N balance. Each experiment was conducted in a replicated 3  3 Latin Square design with three treatments and six replicates each. In the first experiment growing pigs fed diet with 20 % CM had higher feed and N intake and N losses, as well as lower N retained than those fed with 0 and 10 % (p  0.05). In finishing pigs, the highest values of fed and N intake as well as total N losses were found with diets containing 10 and 20 % CM compared with diets without CM. Nitrogen retained decreased linearly as percentage of CM increased in the diet. In the second experiment a N balance was conducted with finishing pigs fed basal diets with 0 and 20 % CM and 10, 12 and 14 % crude protein (CP) balanced for lysine. Nitrogen intake, excretion and retention increased as CP increased in the diet. Although CM increased N intake, no changes in fecal or urinary N excretion and N retention were found. Dietary CM inclusion decreased N utilization efficiency in growing and finishing pigs. However, the undesirable effects of CM at 20 % on N balance were no observed when diets were formulated for ideal protein amino acid pattern for finishing pigs. Therefore, the inclusion of CM in diets for growing and finishing pigs should consider an amino acid balance to maintain an adequate N utilization." @default.
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• W2911702963 date "2018-12-31" @default.
• W2911702963 modified "2023-09-24" @default.
• W2911702963 title "Effect of dietary levels of cane molasses and crude protein on nitrogen balance in growing and finishing pigs" @default.
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