Productive performance of Mexican Creole chickens from hatching to 12 weeks of age fed diets with different concentrations of metabolizable energy and crude protein

• DOI: 10.5713/ab.20.0682
• Publication Date: 2021-01-15T07:19:56Z
• Authors: Miguel Ángel Matu...; Fernando González...; Josafhat Salinas-...; Eliseo Sosa-Montes; Arturo Pro-Martínez; Omar Hernández-Mendo; Juan Manuel Cuca-...; David Jesús Chan-...
• Keywords: Gizzard

The study aimed to evaluate the productive performance, carcass yield, size of digestive organs and nutrient utilization in Mexican Creole chickens, using four diets with different concentrations metabolizable energy (ME, kcal/kg) crude protein (CP, %).Two hundred thirty-six coming from eight incubation batches, were randomly distributed experimental following ME/CP ratios: 3,000/20, 2,850/19, 2,700/18 2,550/17. Each diet was evaluated 59 birds hatching 12 weeks age. variables feed intake (FI), body weight gain (BWG), conversion (FC), mortality, organs, retention nutrients, efficiency gross (GE) CP, excretion N recorded. Data analyzed as a randomized block design repeated measures GLIMMIX procedure SAS, covariance AR (1) adjustment degrees freedom (KendwardRoger), adjusted means compared least significant difference method at significance level 5%.The performance BWG, fat GE not (p>0.05) due effect. In 3,000/20 diet, chickens had lower values FI, FC, crop weight, gizzard retention, CP (p<0.05) than 2,550/17 diet.The age can be 2,550 kcal ME 17% without compromising parameters (BWG, yield) but improving CP.