A trial was carried out to evaluate the effect of sunflower meal inclusion in the broiler diets on the performance, carcass yield and cuts and the economics viability. A randomized block experimental design was used, with five treatments and eight replications of 20 birds per experimental unit. Treatments consisted of including 0, 5, 10, 15, or 20% sunflower meal in a basal diet. Birds and diets were weighed at the beginning and at the end of each experimental phase (1 […]

The present work was aimed to evaluate the effect of mineral protein supplementation with addition of chromium attached to the organic molecule on the productive performance, carcass traits and beef quality in steers finished under grass conditions. For this, 18 Nellore and 18 F1 Brangus × Nellore steers were used, with 16 months of average initial age and slaughtered at 22 months, distributed equally into two treatment of mineral protein supplementation with and without addition of chromium attached to the […]

Two experiments were carried out to evaluate the effect of five digestible threonine:lysine ratios (TL) on the nitrogen balance of growing pigs and five levels of net energy (NE) on growing-finishing pigs performance. In the first experiment, 15 high-lean commercial crossbred barrows, with initial weight of 37.0 ± 2.6 kg, were allotted to a completely randomized design, with five diets (digestible threonine:lysine ratio of 0.574, 0.624, 0.673, 0.722, and 0.772, in low protein diets, 14.7%) and three replications. Absorbed crude […]

Eighty barrows, commercial hybrids of high genetic potential for lean meat deposition in the carcass, were used to evaluate the effect digestible tryptophan levels for pigs from 97.0 ± 2.81 to 125.0 ± 3.31 kg. A randomized experimental block design was used, with five treatments (0.124; 0.133; 0.142, 0.151 and 0.160% of digestible tryptophan, corresponding to digestible lysine ratio of 16.5, 17.7, 18.9, 20.1 and 21.3%), each one with eight replications of two animals. Diets and water were supplied ad […]

The objective was to analyze the chemical composition and profile of fatty acids of broilers meat (breast and drumstick/thigh) fed diets with fish meal and oats. A completely randomized design, with five diets, three replications of 10 birds each, was used. Diets with 4.5 or 9% fishmeal, 10 or 20% oats, and control diet were evaluated. There was no difference in breast chemical composition. Drumstick/thigh of birds fed diets with 9% fishmeal and 10% oats showed greater amount of lipids […]

An experiment was conducted with 2,112 Ross male broiler chicks, with the objective to evaluate the use of non-nutrient additives (antibiotic, prebiotic and symbiotic) on performance and carcass characteristics of broilers. The birds were distributed in a complete randomized design in 2 × 6 (corn × additive) factorial arrangement, with 12 rations, eight replicates and 22 birds per experimental unit. Diets were based on corn and soybean meal, using in the half the rations standard quality corn (Rations 1 to […]

This study was conducted to evaluate the effect of different levels of digestible lysine in diets on the performance of piglets from 6 to 15 kg. One hundred and twenty piglets (80 castrated males and 40 females) were used. The piglets were allotted to a completely randomized block design, with five treatments (1.06, 1.16, 1.26, 1.36, and 1.46% of digestible lysine), eight replicates and three animals per experimental unit, kept in thermoneutral environment. The dietary level of digestible lysine did […]

It was evaluated four crude protein (CP) levels in diets considered as commercial fed to barrows in the growing and finishing phases. A total of 48 barrows, from the same genetic strain, averaging initial weights of 30.8 ± 0.12 kg (growing phase) and 61.2 ± -0.89 kg (finishing phase), segregated in the production system, was used. The animals were allotted to randomized blocks design, composed of four treatment (level of CP) and six replications and two animals per experimental unit. […]

The experiment was conduced to determine the requirements of digestible methionine + cystine of barrows with high potential genetic for lean meat deposition from 60 to 95 kg. Seventy hybrid commercial barrows with the same genetic pattern, with initial average weight of 60.00 ± 1.13 kg, were allotted to a randomized experimental blocks design with five digestible methionine and cystine levels (0.440; 0.464; 0.488; 0.512 and 0.536%), corresponding, respectively, to 55.0; 58.0; 61.0, 64.0 and 67.0% of methionine and cystine: […]

Data from 44 bulls of the genetic groups Selection Nellore (NeS), Control Nellore (NeC) and Caracu (Ca) herds born in 1999 were used to evaluate the effects of selection for post weaning weight on carcass traits and meat cuts yields at 378 days of age (P 378). The animals were randomly distributed into two experimental classes: restricted feeding (AR) and ad libitum feeding (AL) including 8 animals from the NeS and Ca groups and 6 animals from the NeC group. […]