A performance trial was conducted to determinate the nutritional requirement of lysine for laying Japanese quails (Coturnix coturnix japonica). Two hundred and eighty eight Japanese quails with 51 old days, during four cycles of 21 days, were allotted to a completely randomized design, with six treatments and six replicates, and the experimental unit constituted by eight quails. One control diet, with appropriated levels of the crude protein and amino acids and others five diets, with increasing levels of lysine (.65, […]

Two hundred and forty male broilers, Hubbard strain, with average 689±5.27 g LW maintained, from 22 to 42 days of age under heat stress (31.9±0.29ºC) conditions were used. A completely randomized design, with five treatments (3000, 3075, 3150, 3225 and 3300 kcal metabolizable energy/kg of diet), six replicates and eight animals per experimental unit was used. The effects of different levels of metabolizable energy (ME) levels on the performance, carcass quality and physiological variables of broilers fed isoproteic diets, in […]

Adigestibility assay was carried out to evaluate the nutritional value of hay from the upper third of cassava foliage, variety “Mantiqueira” (Manihot esculenta, Crantz) in sixteen rabbits of New Zeland White breed, eight males and eight females, with 50 days of age. A completely randomized design, with two treatments and eight replicates for treatment, was used. In the test diet, cassava foliage hay replaced 30% DM of the reference diet, containing 19.30% of crude protein, 12.86% of crude fiber and […]

This experiment was carried out to evaluate the metabolizable energy (ME) (2850, 2921, 3000, 3075 e 3150 kcal/kg) levels for male broilers from 1 to 21 days of age, maintained in thermoneutralenvironment. Four hundred and fifty chicks, male, with average initial 44±0.2 g LW, were allotted to a completely randomized experimental design with five treatments, nine replicates and ten animals per experimental unit. The ME level of the diet affected the average weight gain and the ME intake, which increased, […]

The objective of this work was to verify the effect of the supply LT 516 strain of Lactobacillusacidophilus, adjoining to the milk, on dairy calves performance from birth to 56 days of age. Thirty-six newborn calves were allotted to a randomized blocks grouped by sex, breed and birth weight. The daily supply of a concentrate with viable cell (1,9 x 1010 UFC/anim) of Lactobacillusacidophilus (LT 516), from birth to 56 days of age (Treatment 1); the daily supply of the […]

This work was carried out to isolate, characterize and identify Lactobacillusacidophilus strain from calves feces with 1- 3 days of age, collected directly from the rectum. The following tests for the characterization of the isolates were done: cellular morphology, gran test, catalase, gas production from glucose, growth at 15 and 45ºC, Litmus milk reduction, growth in culture medium with 4 and 8% sodium chloride, arginine hydrolysis, nitrate reduction and fermentation of several “carbohydrates”. From a total of 526 initial isolates, […]

The objective of this work was to select strains of Lactobacillus acidophilus to be used as a probiotic in calves.Strainsof Lactobacillus acidophilus (12) were isolated from calves feces and selected according to their acidifying capacities, resistance to hydrochloridric acid, lysozyme, phenol, biliary salt, antibiotics used in the calves productions, capacities of growing in ruminal liquid, and their capacities to inhibit a strain of enteropathogenic Escherichia coli in vitro. The isolates were classed as slower in lactic acid production. In test […]

The objective of this work was to evaluate the effect of the administration of 20 mg of slow liberation bovine somatotropin (rBST) on the dry matter intake and on the digestibility coefficient of dry matter (MS), acid detergent fiber, crude protein, crude energy, nitrogen balance and the daily weight gain in lambs fed diets based on corn silage, sugar cane or hydrolyzed bagasse and concentrate. Twenty-four crossbred lambs, averaging 4-5 months of age and 22 + 2 kg LW, were […]

The ruminal dry matter (DM) and crude protein (CP) degradability of some feeds were evaluated by the in situ technique, using three Holstein cows. The concentrate feeds were ground through a 2 mm screen and the forage and the cassava root, in 5 mm screen, and incubated in nylon bag (53µ). The effective degradability (ED) of DM (5%/h) for corn silage, sorghum silage, corn, sorghum, wheat bran, triticale, cassava scraping, citrus pulp, soybean meal, cottonseed meal and meat and bone […]

The experiment was carried out to evaluate the effect of different levels of broiler litter (15 and 30%), associated or not to a supplement based on bovine lyophilized ruminal microbiota (0 and 10 g/anim.day), in Holstein/Zebu steers feeding. Four steers fistulated in the rumen and abomasum were allotted to a 4 x 4 latin square in a 2 x 2 factorial arrangement (level of broiler litter x with or without ruminal microbiota), full fed individually. The ruminal microorganisms composition, efficiency […]