The experiment was conducted aiming at evaluating the levels of supplementation of vitamin D from two sources (vitamin D3 and 25-OHD3) on diets for broiler chickens raised in cages. It was used 1,500 line Cobb-700 male chicks at one day of age, housed in metal cages (100), with appliances and management fitted for bird raising. In each growing phase (starter, from 1 to 21 days; growing, from 22 to 38 days, and finishing, from 39 to 45 days), it was […]

The objective of the present study was to evaluate the genetic structure of Gyr cattle selected for milk production. Files of pedigree and production were composed of 27,610 animals. The ENDOG program was used for the calculation of individual inbreeding coefficient (F) and coefficient of average relatedness (AR), effective number of animals(Ne), effective number of founders (fe) and ancestors (fa), and generation interval (GI). Individual inbreeding coefficients and average relatedness in the population were 2.82% and 2.10%, respectively. It was […]

This research evaluated the influence of yeast and zinc on growth performance and metabolic responses of Nile tilapia. Diets were formulated to contain 32.0% digestible protein and 3,240 kcal DE/kg diet and the following autolized yeast (%):zinc (mg/kg)relationships: 0.0:0.0; 0.0:79.5; 2.0:0.0; 0.795:79.5; 2.0:200; 4.0:400; 6.0:600; 12.0:1,200 and 14.0:1,400. It was used 135 fingerlings (7.27 ± 0.19 g), distributed in a complete random design in 27 50-L aquaria and they were fed ad libitum four times a day for 128 days. […]

This work was carried out with the goal of demonstrating and performing internal evaluation of the mathematical model developed to describe the reproductive performance in production systems and to simulate reproductive performance of beef cows from the body condition score at calving (BCSAC). This model is based on the relationship between BCSAC and the interval between calving and conception (ICC) for lactating cows; for heifers and empty cows at conception, it was based on the probability of occurrence. For internal […]

This experiment was carried out to evaluate the effects of two vegetal oils sources, charcoal and vitamin E on performance and lipid levels in blood and eggs of commercial laying hens. It was used Lohman Brown and Lohman LSL laying hens at 58 weeks of age. The experiment lasted 84 days split in three 28-day periods and it was carried out in a complete random design in a split-plot scheme, in a 8 x 2 factorial scheme in the plots […]

Itwas evaluated qualitative characteristics of confined hair sheep submitted to diets with two energy levels. Eighteen lambs from each genotype were used: Morada Nova, Santa Inez and Dorpper x Santa Inez crossbreds. The rations with the lowest and the highest energy level were made up with 2.5 and 2.94 Mcal EM/kg DM, respectively. It was evaluated conformation and finishing carcass, in addition to leg tissue composition. The score for conformation was significantly higher for animals kept in diet with the […]

The aim of this study was to evaluate the requirement of crude protein (CP) and digestible energy (DE) in piavuçu fingerlings (Leporinus macrocephalus), for a period of 45 days. It was used 150 fingerlings with average weight of 0.40 ± 0.08g, distributed in 30 aquariums (30L) in a completely randomized design in a 3x 2 two-factorial scheme composed of three levels of crude protein (25, 30 and 35% of crude protein) and two levels of digestible energy (3,250 and 3,500 […]

The aim of this study was to evaluate performance and egg quality of Japanese quails (Coturnix japonica) fed rations with low-tannin sorghum replacing corn. Two hundred and ten 65-d female Japanese quails were distributed in a complete random design with five experimental rations (0, 25, 50, 75 and 100% replacement of corn by sorghum) and six replicates with seven birds. There was no significant effect of sorghum levels in the diets on any of the production characteristics in this experiment, […]

This study aimed at evaluating plasma concentration of urea nitrogen, the number of ovulations and the diameter of ovulatory follicle of Santa Ines ewes submitted to flushing with sources of protein with different ruminal degradabilities. Forty-four estrus-synchronized ewes were fed isoprotein diets composed of soybean meal (n = 24) or corn gluten meal and cottonseed meal (n = 20) for 28 days before ovulation. Animals were distributed in a block design in which the blocks were formed by three score […]

It was evaluated four levels of silk flower (Calotropis procera S.W.) hay (SFH) as a substitute of sorghum (Sorghum bicolor) hay (SBH) in diet for lambs. Nutritional value of silk-flower hay was determined based on aparent digestibility and on metabolic, productive and economical performance of Santa Inês lambs. It was used twenty-four castrated males at 15.72 ± 1.92 kg body weight randomly distributed in four diets with silk-fklower and sorghum hay ratios (100:0, 66:33, 33:66, 0:100), and supplemented with a […]