Fifty hybrid gilts, with high genetic potential for lean gain and initial and final average weight of 30.0 ± 0.45 and 59.9 ± 2.53 kg, respectively, were used in an experiment to evaluate diet with different levels of lysine. An experimental design of randomized blocks, with five treatments, five replicates and two animals per experimental unit, was used. The treatments corresponded to a basal diet with 17.5% crude protein, supplemented with five levels of HCl-L-lysine, resulting in diets with 0.80, […]

Fifty hybrid gilts, with high genetic potential for lean gain and initial and final weight of 15.39 ± 0.59 and 30.93 ± 1.72 kg, respectively, were used to evaluate diet with different levels of lysine. An experimental design of randomized blocks, with five treatments, five replicates and two animals per experimental unit, was used. The treatments corresponded to a basal diet with 19% crude protein, supplemented with five levels of HCl-L-Lisine, that resulted in diets with 0.95, 1.05, 1.15, 1.25 […]

An experiment was carried out to evaluate the effect of diets with different protein levels and energy:protein ratio and amino acids on the performance and body composition of broilers (300 males and 300 females from 1 to 49 days of age), as well as the effect of these factors on the nutrients utilization efficiency. Three isoenergy experimental diets (D) were used (3000 and 3150kcal ME/kg for starter and growing phase, respectively) varying the levels of crude protein (CP) and the […]

Fifty barrows (30.10 ± 0.48 kg to 60.08 ± 0.49 kg live weight were assigned to a completely randomized blocks design, with five digestible methionine plus cystine levels (0.448, 0.490, 0.531, 0.573, and 0.615%), five replicates and two animals per experimental unit, to evaluate the requirement of digestible methionine plus cystine The digestible methionine and cystine levels of the diet influenced the average daily gain that increased in a linear way. However, the linear response plateau model was what best […]

The purpose of this study was to determine the N-corrected apparent metabolizable energy (EMAn) of alternative protein ingredients, for newly hatched chicks, and to evaluate the effects of the utilization of these ingredients in the first week broiler feed, on the performance and gastrointestinal tract (TGI) development. In the metabolism trial, 288 male chicks from 4 to 7 days were allotted to a completely randomized design with six treatments (a reference diet and five diets with inclusion of the test […]

This work was conducted to determine the N-corrected apparent metabolizable energy (EMAn) of different carbohydrate sources for broilers from 1 to 7 days, and to evaluate the utilization of these ingredients in the diet of newly hatched broilers based and on live performance and on the gastrointestinal tract (TGI) development. Total excreta collection method was used in trial one, with 220 male chicks from 4 to 7 days, allocated to batteries in a completely randomized design with five treatments (a […]

An experiment was conduced to determine the crude protein (CP) level in diets with amino acids supplementation for gilts maintained in a thermal comfort environment. Fifty crossbreed crossbred gilts (Landrace x Large White) with initial average weight of 30.1 kg were allotted to a completely randomized experimental design, with five treatments (19, 18, 17, 16 and 15% of CP with supplementation of lysine, methionine, tryptophan, threonine and valine to maintain the same protein quality) five replicates and two animals per […]

Fifty-six pigs (average initial weight of 28.47 kg) were assigned to a randomized blocks design, in a factorial scheme 4 x 2 (levels of dicalcium phosphate substitution x sex) with four repplicates for males and three for females, with two animals per experimental unit, to evaluate the effects of replacement levels of phosphate dicalcium by phosphate monodicalcium on the performance, blood and bone parameters of swine fed during the growing (30 to 60 kg) and finishing (60 to 90 kg) […]

Fourty beef cows (330 kg) were allotted to a completely randomized design, in a 2×2 factorial scheme (two supplementation levesl [0.5 and 1.0% LW] and two energy sources [whole oat grain and ground corn grain]) to evaluate perfomance of animal grazing Marandugrass (Brachiaria brizantha Hochst ex. A. Rich Stapf), during the dry season. Supplements were formulated to contain 15% of crude protein (CP). Average daily gain showed no difference among treatments (0.58 and 0.69 kg/d for oat, and 0.54 and […]

The trial was conducted to evaluate the effects of energy supplementation with ground sorghum grain on grazing beef steers weight gain. Sixty five steers without definite breed, aging 12 to 15 months and weighing an average 140 kg of live weight were kept under set stocking on a natural pasture improved with Lotus subbiflorus. Treatments consisted of control or without supplement (T0); 0.75% of mean live weight (T0.75) and 1.5% of mean live weight (T1.75) of ground sorghum grain. Animals […]