This experiment was carried out to determine the nutritional requirement of methionine + cystine (sulfur amino acids) for Hubbard and Ross broilers from 1 to 21 and from 22 to 42 days of age, of both sexes. Weight gain, intake, feed:gain and carcass composition were evaluated. Two thousand and four hundred broilers were used in the phase from 1 to 21 of age and 1800 broilers in the phase from 22 a 42 days of age. Basal diets with 21 […]

An experiment was conducted with 1120 Hubbard broiler to study the use of feed restriction on the performance and the carcass characteristics of the broiler chickens. Four levels of feed restriction (0.0, 15.0, 30.0 and 45%), two sex, and two periods (from 8 to 14 and from 8 to 17 days of age) were tested. A completely randomized design with four replicates and 20 birds per experimental unit was used. Body weight, weight gain, diet intake, non-edible viscera, abdominal fat, […]

This work aimed to establish lysine requirements for white-egg (Lohmann Selected Leghorn) and brown-egg (Lohmann Brown) layers hens in the second producing cycle, from 83 to 98 weeks of age. A completely randomized design with six replicates and eight birds per experimental unit was used. The treatments consisted in a 2 x 6 factorial involving two commercial lines and six lysine levels. The birds were fed diets containing 2860 kcal of ME/kg, 14.37% CP, and .50% lysine, supplemented with six […]

The objective of this experiment was to evaluate the performance of three genetic groups of broiler chicks, obtained at UFV, called UFV1, UFV2 and UFV3, fed diets with different crude protein (CP) levels. Two hundred and forty chicks of each genetic group, totaling 720 chicks, were allotted to 48 floor pens up to 42 days of age. At the initial phase (1 to 21 days), all chicks were fed an unique diet. At the final phase (22 to 42 days), […]

The experiment was conducted to estimate the effect of heat stress and the potassium chloride (KCl) supplementation on performance and physiological characteristics (hematological parameters, rectal temperature) of broiler chicks. Forty birds, from 42 to 49 days, were submitted to heat stress (16 hours in 25 ± 1°C, two hours at increasing temperature, four hours in 35 ± 1°C and two hours at decreasing temperature until 25±1°C, with 63.5 ± 5% humidity) fed the following treatments: .50 and 1.00% KCl in […]

The objective of this work was to evaluate the spray-dried porcine plasma (SDPP) in the diet of 21 day-weaned pig. One hundred and twenty piglets averaging 5.75 kg of initial weight were used to test the inclusion levels of 0, 2.5, 5.0, and 7.5% of porcine plasma on phase 1 (from 0 to 14 days) and its effects on phase 2 (from 15 to 28 days). Except for the piglets in the control diet, all other animals were fed a […]

The experiment was conducted to evaluate the effect of agricultural gypsum addition to broiler litter on broiler performance. Four levels of gypsum: G1, G2, G3 and G4 (respectively, 10, 20, 30 and 40% in relation to a control group that used 50 kg of wood scraps) were tested. The gypsum was added at different periods: T1 (when the broiler presented nine days of age) and T2 (the total amount of gypsum was divided in half and applied, respectively, at the […]

The objective of this work was to study the restorative yeast (Saccharomyces sp) dried by rotative roller (RYRR) or by spray-dry (RYSD), on the performance of 176 growing rabbits, 88 males and 88 females, white New Zealand breed, from 40 to 90 days of age.The animals were distributed in a randomized complete block design, with 11 treatments (five levels of each one yeast: 4.0, 8.0 12.0 16.0, and 20,0%) in gradually replacement of soybean meal (SM) crude protein (CP) of […]

The objective of this experiment was to determine the digestible lysine requirement for male broilers in the period from 22 to 42 days. Four hundred and sixty male broilers Hubbard, with an initial average weight of 631 g, were allotted in a randomized block experimental design with five treatments, six replicates and 15 birds by experimental unit. The treatments corresponded to five L-lysine levels supplemented to a basal diet with 19,64% of crude protein and 3100 kcal of ME/Kg resulting […]

The objective of this experiment was to determine the threonine requirement for broilers in the period from 22 to 42 days of age. Nine hundred and sixty broilers were random allotted in a 6×2 factorial arrangement, with six total threonine levels ( .67, .71, .75, .79, .83, e .87%) two sexes with five replicates with 16 birds each. The feed intake, weight gain, feed:gain ratio, plasma uric acid concentration, yields of carcass, special cuts and abdominal fat, and body composition […]