P Tancharoenrat1, V Ravindran2. 1. Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North 4442, New Zealand. 2. Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North 4442, New Zealand V.Ravindran@massey.ac.nz.
Abstract
The influence of tallow and Ca concentrations on the performance, apparent ileal digestibility, and total tract retention of N, Ca, P, and AME in broiler starter diets fed corn-soy-based diets was examined. The experimental design was a 3 × 3 factorial arrangement of treatments evaluating 3 inclusion levels of tallow (0, 40, and 80 g/kg) and 3 dietary concentrations of Ca (7, 10, and 13 g/kg). Nine treatment diets were formulated to meet the requirements for major nutrients for broiler starters, except for AME and Ca concentrations. The results showed that increasing tallow inclusion increased (P < 0.001) the weight gain and lowered (P < 0.001) the feed to gain. Increasing dietary Ca concentrations decreased (P < 0.001) the weight gain. Birds fed diets containing 7 g/kg of Ca had similar (P > 0.05) feed to gain to 10 g/kg of Ca but lower (P < 0.05) than that of 13 g/kg of Ca. In diets with no tallow, increasing Ca concentrations decreased (P < 0.05) feed intake, whereas diets with 40 and 80 g/kg of tallow containing 13 g/kg of Ca showed lower (P < 0.05) feed intake than those of 7 and 10 g/kg of Ca. Diets supplemented with 40 and 80 g/kg of tallow containing 7 g/kg of Ca showed the lowest (P < 0.05) excreta soap content. Total tract retention of fat was higher (P < 0.001) in diets with 40 g/kg of tallow compared with those with 0 and 80 g/kg of tallow. Birds fed diets containing 7 g/kg of Ca had similar (P > 0.05) fat retention to that of 10 g/kg of Ca, but higher (P < 0.05) than that of 13 g/kg of Ca. Calcium retention decreased (P < 0.001) with increasing Ca concentrations. Diets containing 13 g/kg of Ca had the lowest (P < 0.01) P retention. Diets with no inclusion of tallow containing 7 g/kg of Ca had higher (P < 0.05) N retention than that of 13 g/kg of Ca, but similar to 10 g/kg of Ca, whereas in 40 g/kg of tallow diets, 7 g/kg of Ca had the highest (P < 0.05) N retention. Increasing fat inclusion increased (P < 0.001) the soap content in ileal digesta. Diets with 40 g/kg of tallow had the highest ileal digestibility of fat (P < 0.001) and N (P < 0.01). Increasing inclusion of fat decreased (P < 0.001) ileal Ca digestibility. Diets containing 7 g/kg of Ca showed the highest ileal digestibility of fat (P < 0.01), N (P < 0.01), and P (P < 0.001). Birds fed diets containing 13 g/kg of Ca had higher ileal digestibility of Ca (P < 0.001) than those fed 7 and 10 g/kg of Ca diets. Overall, present data showed that the total tract retention and ileal digestibility of fat were higher with supplementation of 40 g/kg of tallow compared with those of 0 and 80 g/kg of tallow. High dietary Ca concentrations adversely affected the performance and the utilization of energy, N, Ca, and P in broiler starters. Poultry Science Association Inc.
The influence of tallow and Ca concentrations on the performance, apparent ileal digestibility, and total tract retention of N, Ca, P, and n>an class="Disease">AME in broiler starter diets fed corn-soy-based diets was examined. The experimental design was a 3 × 3 factorial arrangement of treatments evaluating 3 inclusion levels of tallow (0, 40, and 80 g/kg) and 3 dietary concentrations of Ca (7, 10, and 13 g/kg). Nine treatment diets were formulated to meet the requirements for major nutrients for broiler starters, except for AME and Ca concentrations. The results showed that increasing tallow inclusion increased (P < 0.001) the weight gain and lowered (P < 0.001) the feed to gain. Increasing dietary Ca concentrations decreased (P < 0.001) the weight gain. Birds fed diets containing 7 g/kg of Ca had similar (P > 0.05) feed to gain to 10 g/kg of Ca but lower (P < 0.05) than that of 13 g/kg of Ca. In diets with no tallow, increasing Ca concentrations decreased (P < 0.05) feed intake, whereas diets with 40 and 80 g/kg of tallow containing 13 g/kg of Ca showed lower (P < 0.05) feed intake than those of 7 and 10 g/kg of Ca. Diets supplemented with 40 and 80 g/kg of tallow containing 7 g/kg of Ca showed the lowest (P < 0.05) excreta soap content. Total tract retention of fat was higher (P < 0.001) in diets with 40 g/kg of tallow compared with those with 0 and 80 g/kg of tallow. Birds fed diets containing 7 g/kg of Ca had similar (P > 0.05) fat retention to that of 10 g/kg of Ca, but higher (P < 0.05) than that of 13 g/kg of Ca. Calcium retention decreased (P < 0.001) with increasing Ca concentrations. Diets containing 13 g/kg of Ca had the lowest (P < 0.01) P retention. Diets with no inclusion of tallow containing 7 g/kg of Ca had higher (P < 0.05) N retention than that of 13 g/kg of Ca, but similar to 10 g/kg of Ca, whereas in 40 g/kg of tallow diets, 7 g/kg of Ca had the highest (P < 0.05) N retention. Increasing fat inclusion increased (P < 0.001) the soap content in ileal digesta. Diets with 40 g/kg of tallow had the highest ileal digestibility of fat (P < 0.001) and N (P < 0.01). Increasing inclusion of fat decreased (P < 0.001) ileal Ca digestibility. Diets containing 7 g/kg of Ca showed the highest ileal digestibility of fat (P < 0.01), N (P < 0.01), and P (P < 0.001). Birds fed diets containing 13 g/kg of Ca had higher ileal digestibility of Ca (P < 0.001) than those fed 7 and 10 g/kg of Ca diets. Overall, present data showed that the total tract retention and ileal digestibility of fat were higher with supplementation of 40 g/kg of tallow compared with those of 0 and 80 g/kg of tallow. High dietary Ca concentrations adversely affected the performance and the utilization of energy, N, Ca, and P in broiler starters. Poultry Science Association Inc.
Authors: F Infante-Rodríguez; J Salinas-Chavira; M F Montaño-Gómez; O M Manríquez-Nuñez; V M González-Vizcarra; O F Guevara-Florentino; J A Ramírez De León Journal: Springerplus Date: 2016-11-09
Authors: Wilfredo D Mansilla; Rosa Franco-Rosselló; Cibele A Torres; Albert Dijkslag; Ana I García-Ruiz Journal: Poult Sci Date: 2020-07-03 Impact factor: 3.352