This experiment was conducted to evaluate the effect of phytase addition on the use of feeding ingredients for laying quails. It was used 200 female Japanese quails at 251 days of age at an average weight of 187.2 ± 6.0 g and egg production rate of 84.8%. The quails were distributed in a complete random design with four experimental diets and five repetitions of ten birds per experimental unity. The experimental diets were consisted of corn and soybean meal based […]

A total of 1440 male broiler chickens from 8 to 21 days old was assigned to two experiments to evaluate the physical form of diet, use of enzymes and nutritional levels of corn-soybean meal based diets. A completely randomized design as a 2 × 2 × 2 factorial scheme, two physical forms of diet (meal or crushed), with or without enzimatic complex (amylase, cellulase and protease) and two nutritional levels (95 or 100% of the recommendations), was used. In the […]

Thirty-two non castrated Ile de France lambs fed corn silage or sugar-cane based diets with two roughage:concentrate ratios (60:40 or 40:60) were used. The animals were kept individually confined with control of the supplied food and leftovers, weekly weighted for determination of the daily weight gain and food conversion. Simultaneously, it was carried out digestibility and metabolism trials to determine the nutrient intake and digestibility and nitrogen balance of the experiment diets. The weight gain (294.6 g/day) was higher for […]

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 the present study was to propose the use of protein free diet (PFD) associated with synthetic amino acids (AA) as method to determine the amino acid and protein endogenous loss in broiler chicks, as the normal endogenous flux is underestimated in PFD use. Eighty-four Ross 308 male chickens were used, aged from 17 to 22 days in a randomized complete design, totaling two treatments with six replications, with seven birds per experimental unit. The endogenous amino acid […]

The equine is a non herbivore ruminant that is able to fully provide its nutritional need by the grass intake. Equines show the cecum and colon region plenty developed as their principal fermentation site. Such process either happens in the non glandular stomach region, but the volatile fatty acids production is inferior then the production in the – hindgut. To meet the optimum use of the mix of ingredients, and to avoid excess there are harmful to the equine metabolism, […]

This manuscript reports on the main problems decreasing productivity of dairy cows (e.g. fatty liver syndrome and poor fertility) and how antioxidants could enhance it. High producing dairy cows are prone to oxidative stress, and the situation can be exacerbated under certain environmental, physiological, and dietary conditions. Antioxidants have important effects on the expression of genes involved in the antioxidant status, which may enhance animal health and reproduction. Moreover, antioxidants may contribute to decrease the incidence of spontaneous oxidized flavour […]

In order to measure the net portal and visceral flux of metabolites in lambs (35 ± 2.5 kg live weight) fed rice-grass (Echinochloa sp.) hay cut at 32, 46, 72 or 96 days of regrowth age, two assays were carried out. One of them was a 4 × 4 Latin Square experiment (Assay 1) where the four hays were evaluated and the other was a 3 × 3 Latin square experiment (Assay 2) that did not include the 32-day hay. […]

The source of phosphorus of better quality for use in the pig feeding and that cause less environment impact by the excretion of phosphorus in the enviroment was evaluated. Twenty-one male pigs weighting 34.94 ± 2.88 were fed corn-soybean meal based diets supplemented with different P sources: control without P supplementation P (Cont), dicalcium (FBC), monodicalcium (MBC), triple superphosphate (ST), simple superphosphate (SS), Catalão rock (Rocha) and phosphoric acid (AcF). The experiment was designed to evaluate the P availability and […]

This review summarizes recent developments on the utilization of specific fatty acids to modulate bovine energy metabolism, with emphasis on the periparturient dairy cow. A number of experiments have assessed the effects of polyunsaturated fatty acids on bovine hepatic energy metabolism using in vitro and in vivo models. Treatment of hepatocytes with specific fatty acids altered energy metabolism in vitro. For example, linolenic acid seemed to decrease hepatocyte triacylglycerol accumulation. This effect was confirmed in vivo, using parenteral infusions of […]