This study aimed to evaluate liver and breast muscle insulin-like growth factor I (IGF-I) and growth hormone receptor (GHR) gene expression between broilers fed different methionine levels and sources. Broiler chicks were 22 to 42 days old, distributed in 5 treatments (control diet, DL1 - 0.08% DL-methionine, DL2 - 0.24% DL-methionine, MHA-FA1 - 0.11% methionine hydroxy analogue-free acid, and ...

This study aimed to investigate the effects of dietary zinc (Zn), environmental temperatures and Zn×temperature interaction on growth, feathering score and mineral composition of broilers. A total of 256 d-old Avian male broiler chicks were randomly allocated to a 4×2 factorial arrangement with four corn-soybean meal basal diets (containing 44 mg Zn/kg) supplemented with 0, 40, 60 mg/kg Zn (Die...

Corn distillers dried grains with solubles (DDGS) are now being further processed to remove corn oil, which may be used as a dietary energy source for poultry. The objectives of this study were to compare the effects of a poultry fat (PF) and a new DDGS-derived corn oil blend (CO) on live performance and carcass characteristics of 49-d-old broilers. Four corn-soybean meal based diets were formu...

Shea nut meal is a by-product of the shea fat industry in West Africa. The objective was to determine the effect of shea nut meal fermentation using Aspergillus niger on growth performance of broiler chickens. An expeller shea nut meal was fermented in a closed plastic container for 8 d after the addition of 0.25 g of A. niger spores per kg of shea nut meal in 2 parts of water. Each of the 2 sh...

this experiment was conducted to evaluate the effect of vitamin premix withdrawal from diets containing different energy levels on growth performance and carcass characteristics of broilers subjected to heat stress in a completely randomized design with 2×3 factorial arrangement containing, 2 levels of energy (low and high energy) and 3 levels of vitamin premix withdrawal (28, 35 and 42 days). ...

This study was planned to determine the effects of feed restriction applied at different times and levels on occurrence white striping wooden breast myopathies, performance, carcass characteristics some blood parameters in broilers. In total, 600 male broilers were randomly placed 5 groups with eight replicates. Control group fed ad libitum throughout experimental period. T1 T2 received as 80% ...

A study was conducted to investigate the effects of thermostable phytase supplementation on the growth performance and nutrient digestibility of broilers for 42 d. 1-day-old Arbor Acres chicks with similar initial body weight were randomly divided into 3 treatments consisting 6 pens of 20 chicks per pen. The control group was given maize-soybean meal basal diet and the other two groups were fed...

Two experiments (EXP) were conducted to evaluate the interactive effects of dietary AME and amino acid (AA) density (total basis) on broiler chickens from 42 to 56 d of age. In EXP 1, diets were formulated to contain low AME (3,140 kcal/kg) and moderate AME (3,240 kcal/kg) in combination with moderate AA (16.2% CP, 0.88% Lys, and 0.75% TSAA) and high AA (18.0% CP, 0.98% Lys, and 0.83% TSAA) and...

The effect of dietary lipids and Clostridium butyricum supplementation on circulating lipids and the transcription of selected genes involved in lipid metabolism were investigated in broiler chickens. One hundred and sixty-day-old broilers (Arbor Acres) were divided into four treatment groups in a 2 × 2 factorial arrangement and fed four diets with two lipid sources (soybean oil or fish oil) an...

Preventing leg disorders in broilers, without changing their body weight at slaughter age and their rearing time is a challenge for poultry production. The method of prevention we studied consisted in alternating the distribution of different diets. This kind of diet schedule is called “sequential feeding”. The alternation of poorand rich-lysine diets was used in order to reduce early growth an...