The objective of this result was to evaluate the yields of non-carcass components of lambs finished in feedlot feeding on diets with corn silage or sugarcane under two levels of concentrate. Thirty-two non-castrated Ile de France lambs fed on corn silage or sugar cane with two roughage:concentrate ratios: 60:40 or 40:60. Lambs were confined until they reached 32 kg of body weight (BW), when they were slaughtered. After the bleeding, all non-carcass components (blood, skin, head, feet, rumen, reticulum, omasum, […]

The objective of this research was to study the ingestive behavior of feedlot cows fed additives based on plant extracts or monensin sodium. Twenty-four Charolais and Nellore crossbred cows with age and average initial weight of 7 years and 423 kg, respectively, were used. The experimental diets were plant extracts: basal diet + 5 g/animal/day of a natural additive composed of 750 mg of essential oil of thyme (Thymus vulgaris), 150 mg of garlic (Allium sativum), 250 mg of rosemary […]

The objective of this trial was to evaluate the effect of different forms of processing of cassava peel in sheep feeding on performance traits, carcass, morphology and rumen and economic technical feasibility. Twenty non-castrated male Santa Ines lambs of 19.02±0.21 kg of initial body weight and 90 days of age at the beginning of the study were used in this trial. The design was completely randomized design with five replications per treatment. During the experimental period of 84 days, including […]

The experiment was conducted with the objective evaluating the effect of supplementation of glycine in diets with different digestible threonine:digestible lysine ratios on the activity of enzymes that metabolize threonine. Five hundred and sixty male broiler chicks from the Cobb strain were used during the period of 8 to 21 days, distributed in a completely randomized design, in a 3 × 2 + 1 factorial arrangement, with 3 digestible threonine:digestible lysine ratios (55; 65 and 75%), with or without supplementation […]

This experiment aimed to determine the influence of diets with inclusion of protected fat and vitamin E on performance, yield and carcass characteristics of feedlot lambs with different weights. Thirty-two non-castrated Santa Ines lambs were fed diets with a ratio of 40% forage and 60% concentrate ad libitum, with presence or absence of protected fat and/or vitamin E, in a total of four diets. Two weights of early containment were also considered: between 20 and 25 kg and between 30 […]

The objective of this study was to trace the inclusion of bovine meat and bones meal in diets of laying hens analyzing eggs and theirs fractions (yolk and albumen), by carbon and nitrogen stable isotopes, as well as to evaluate the detectable analytical minimal index. Two hundred and forty (240) Shaver White laying hens aging 73 weeks were distributed in a completely randomized design, with five treatments and six replicates. Five increasing levels (0; 1.5; 3.0; 4.5 and 6.0%) of […]

This study was carried out to evaluate yield of carcass cuts, loin eye area, centesimal composition and fatty acids profile of carcass of meat from lambs raised under organic and conventional systems. Forty-eight Ile de France lambs, with average initial weight of 15 kg were distributed in two production models, organic and conventional, and slaughtered when final body weight reached 32 kg. The production models did not affect weight or yields of carcass cuts; however, the longissimus dorsi muscle of […]

Weight-age and hip height-age relations of Nellore calves, from birth to 10 months old were fitted using a logistic model including sex and year of birth as fixed effects. Calves and their dams were reared on natural pasture using continuous grazing system. The crude protein content and total digestible nutrients were analyzed for pasture selected by the animals. The weights of the calves were adjusted to 205 days and 365 days. There were no significant effects of sex and birth […]

The objective of this study was to propose and discuss a method to evaluate the efficiency of feed conversion into product from beef cattle based on regression techniques. The mathematical and statistical procedures were developed using a database composed of measurements of dry matter intake and average daily gain of 380 pure or crossbred zebu animals in 15 different experiments in the database from the BR-CORTE nutritional system. Two approaches were presented, based on linear and non-linear regression, with average […]

This experiment was conducted to evaluate increasing levels of mannanoligosaccharides (MOS) in the diet of Nile tilapia larvae (Supreme®) at the sex reversal stage for 30 days. Nile tilapia larvae (n = 1500, p = 0.01 ± 0.001 g), were randomly distributed in 30 tanks of 100 liters each, for 30 days. The fish were distributed in a randomized design with six treatments and five replicates. The control diet (no MOS) was elaborated to contain approximately 35% of crude protein […]