The effects of weaning age (90 days or 156 days) of female beef calves were evaluated on their subsequent performance from the beginning of the first pregnancy and the end of the second breeding season, at 22/24 months of age. During pregnancy, heifers were managed as a single group on Brachiaria brizantha cv. Marandu pasture; after calving, on bristle oats (Avena strigosa Schreb) and ryegrass (Lolium multiflorum Lam.); and on Brachiaria humidicula pasture during the second reproductive period. The characteristics […]

An experiment was conducted to determine the activities of aspartate aminotransferase and alanine aminotransferase and the liver biometry of laying quails (Coturnix coturnix japonica) from one to 25 days of age. Ninety, day-old, quails were used. A randomized complete experimental design was used with six ages, five replicates and one animal per experimental unit. At 1, 5, 10, 15, 20 and 25 days of age five animals were sacrificed, the liver removed, weighed, frozen with liquid nitrogen and stored at […]

The objective of this study was to verify the effect of increasing soybean oil addition levels in the concentrate, on the enzymatic activity CK (Creatine Kinase), LDH (Lactate Dehydrogenase), AST (Astarte aminostrafase), as an indication of energetic metabolism. Compond experimental diets were given with five oil levels (control, 6, 12, 18 and 24% concentrate). Twenty Arabian equines, average weight 400 kg were submitted to a 80 km endurance race on a treadmill. The endurance was divided into four 20 km […]

Four assays were carried out to determine the apparent metabolizable energy (AME) and nitrogen corrected apparent metabolizable energy (AMEn) of ten feedstuffs of vegetable origin for poultry at different ages. The chemical composition of the ten feedstuffs was also determined: 45% soybean meal, 48% soybean meal, extruded full-fat soybean, deactivated full-fat soybean, micronized full-fat soybean, deactivated soybean meal, soybean protein concentrate, corn gluten meal 21%, corn germ and broken rice. The method of total excreta collection was used and a […]

One thousand eight hundred and ninety male broilers of two strain crosses (fast and slow initial growth) were fed different ideal protein profiles in four-phase feed programs: 1 to 7, 8 to 21, 22 to 34 and 35 to 40 days of age. All vegetable, corn-soybean meal feeds were formulated to maintain the Met+Cys:Lys and Thr:Lys relationships at 75 and 65%, respectively, on true digestible basis. Three ideal protein profiles were used: low, medium and high. From 1 to 21 […]

The objective of this study was to the evaluate physiological, hematological and biochemical parameters of eventing horses fed diets containing soybean oil and submitted to physical effort tests. Twelve horses were used in a completely randomized design with two diets and six replications. The diets used were: diet without soybean oil inclusion (control) and diet with inclusion of 10% soybean oil. The experiment lasted 82 days, with three exercise tests: at the beginning, 60th and 82th day of the experiment. […]

The objective of the present study was to evaluate the effect of using microminerals in organic form on the performance and quality of eggs from commercial laying hens at the end of laying. Four hundred and eighty Hisex strain hens, 72 to 80 weeks of age, were used. A randomized complete design was used, with six replications and 16 birds for each experimental unit. Five diets were evaluated: basal feed supplemented with all microminerals in inorganic form (control); basal feed […]

The present study was carried out to evaluate the in situ degradation of dry matter (DM), neutral detergent fiber (NDF) and crude protein (CP) in roughages by the in situ caecal digestion technique in horses. The roughages evaluated were: Lucerne hay (Medicago sativa), peanut (Arachis pintoi cv. Amarillo), desmodio(Desmodium ovalifolium), stylo (Stylosanthes guianensis cv. Mineirão), pigeon pea (Cajanus cajan), lime-yellow pea (Macrotyloma axillare) and coastcross hay (Cynodon dactylon cv. coastcross). The assay was conducted in a complete randomized design with […]

Alternative methods were assessed of qualitative feed restriction compared to the conventional forced molt technique. Four hundred and eighty Babcock hens were used distributed in three levels of feed restriction (100, 75 and 50%) and three body weight reduction percentages (15, 20 and 25%), with five replications of 32 hens. When the birds reached the body weight reduction percentage the packed cell volume, percentages of ovary, oviduct, gizzard, intestine, abdominal fat and oviduct length were determined. Starting on day 28 […]

This study was performed with the objective of assessing the effects of feed and genotype on the quantitative characteristics of carcasses of lambs finished in a feedlot and estimate gross margins. Eighteen lambs of each genotype were used: Morada Nova, Santa Inês and cross-breed Dorper × Santa Inês. Feeds with low and high energetic levels consisted of 2.5 Mcal ME/kg DM and 2.94 Mcal ME/kg DM, respectively. A randomized complete design was used, with a 3 × 2 factorial scheme. […]