This study was developed with the objective of evaluating reflective paint on covering and artificial ventilation on performance of broilers (males and females). A randomized design with a 2 × 2 × 2 factorial arrangement of treatments was used, as follows: 2 external management systems (coverage with and without reflective paint), 2 internal management systems (with and without artificial ventilation) and 2 sexes (male and female), totalizing 8 treatments. A total of 480 1-day old chicks of the Cobb strain […]

An experiment was carried out to evaluate the effect of different forms of water supply for laying hens on performance and egg and water quality. Two types of drinking system were evaluated: cup and nipple. In each treatment 10 replicates had been used, composed for five hens. The experiment lasted 63 days, divided in three periods of 21 days. Data of performance and egg quality were submitted to variance analysis and, when the differences were significant, they were compared by […]

This study was carried out with the objective of estimating the nutritional requirements of digestible lysine for broiler from 1 to 42 days old. A total of 1,950 male Cobb chicks were used (750, 600 and 600 in pre-initial, initial and growing phase, respectively) with initial weight of 45.1 ± 0.6, 160.5 ± 2.4 g and 746.3 ± 10.7 g, respectively. The birds were distributed in a completely randomized design, using six treatments and five repetitions, with 25, 20, and […]