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- Title
EFFECT OF DIETARY LEVELS OF CANE MOLASSES AND CRUDE PROTEIN ON NITROGEN BALANCE IN GROWING AND FINISHING PIGS.
- Authors
Loeza-Limón, Rubén; Vicente-Martínez, Jorge G.; Loeza-Deloya, Violeta M.; Gasperín-López, Isaac De; Ángeles-Marín, Álvaro A.; Pinos-Rodríguez, Juan M.
- Abstract
Cane 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 Nutilization 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.
- Subjects
MOLASSES as feed; NITROGEN in animal nutrition; PROTEINS in animal nutrition; ANIMAL feeding behavior; METABOLIZABLE energy values
- Publication
Agrociencia, 2018, Vol 52, p123
- ISSN
1405-3195
- Publication type
Article