Two experiments, with 288 and 192 birds, half males and half females, respectively, were carried out to determine the zinc (Zn) requirements for broilers in the growing (from 22 to 42 days) and finishing (from 43 to 54 days) phases. Two basal diets were formulated to meet the birds´ nutritional requirements, except for Zn, that was deficient at the levels of 13.0 and 12.0 ppm, respectively. In both experiments it was evaluated Zn supplementation levels, from a commercial Zn oxide, […]

The objective of this study wast to determine the requirement of digestible lysine for light-weight laying hens 24 to 40 weeks of age. Two hundred and sixteen Hy-Line W36 light-weight laying hens were allotted to a randomized complete blocks with six treatments, six blocks and six hens per experimental unit. The treatments consisted of a basal diet, with 14.54% crude protein, deficient in digestible lysine (0.545%), supplemented with six levels of L-lysine HCl (78%) 0.00; 0.059; 0.118; 0.177; 0.237 and […]

The objective of this study was to evaluate different models in the adjustment of weight gain (WG) responses, obtained in an experiment carried out with ISA Label birds from 1 to 28 days of age. A total of 480 male and female chicks were distributed in a completely randomized design, in a 4 X 2 factorial arrangement (lysine levels X sex), with three replications of 20 birds each. The basal diet was formulated to meet the chick requirements, except for […]

Three experiments were carried out to evaluate the performance and nutritional value of the extruded corn for broilers from one to 21 days of age. In the first experiment, the metabolism of pre-gelatinized corn, corn starch and corn germ meal was assessed by the total excreta collection method from 4 to 7 days of age and values of apparent (AME) and corrected metabolizable energy (CAME) and the results were, respectively: 3370, 3379.7, 3259.1 kcal/kg de AME and 3299.8, 3369.7, 3051.6 […]

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 objective of this study was to evaluate the effect of two sources of methionine, DL-Methionine (DLM – 99%) and Methionine Hydroxy Analogue Free Acid (MHA-FA – 88%), at three different levels of supplementation of this amino acids in commercial diets on the performance of broiler chickens. A total of 1.232 commercial Ross broilers was used, from 01 to 47 days of age, and allotted to a complete randomized design in a 2 X 3 factorial (source methionine X supplementation […]

The objective of this study was to evaluate different textures and storage forms of corn in piglet diets. Two experiments were conducted, one of which tested digestibility of nutrients and the other diet performance. In the digestibility trial, 24 crossbred (Landrace X Large White) barrows with an initial weight of 18.7 ± 1.5 kg were used. They were kept in metabolic cages in a randomized block design using the factorial arrangement 2 X 2 (type of corn – dent and […]

The objective of this study was to evaluate the correlations between the measurements obtained by ultrasound and from the carcass and follow the development of the ribeye and fat thickness in buffaloes at different feedlot stages. Twenty castrated, hornless Murrah buffaloes were used. The buffaloes were separated into four groups that were slaughtered at 75, 100, 125, 150 days of feedlot. The measurements taken by ultrasound when the buffaloes reached the slaughter point and from the carcass after the slaughter […]

The objective of this experiment was to evaluate the yield and quality of the carcass and meat cuts from kids of both sexes, slaughtered at three different ages, aiming to use animals from dairy herds. Forty-one kids were used, from three breed groups: Alpine, ½ Boer ½ Alpine (½ BA) and ¾ Boer ¼ Alpine (¾ BA), which were slaughtered at 60, 90 or 120 days of slaughter age. The animals were raised in a feedlot system. The following carcass […]

Four foals, sired by the same stallion, aged between 10 and 12 months and 270 ± 9.80 kg average weight, were alloted in a 4 X 4 balanced Latin Square design. The effects were analyzed of the inclusion of the levels of 5, 10, 15 and 20% of soybean oil in the concentrate on the acceptability, nutrient digestibilities and on total cholesterol plasma concentrations and its fractions: very low density lipoprotein (VLDL-C), low-density lipoprotein (LDL-C), high-density lipoprotein (HDL-C) and total […]