The objective of this study was to evaluate the effects of an enzymatic complex composed of protease, xylanase and amylase, associated or not to betaine in diets for broiler chickens on the performance of birds and economical analysis. It was used Cobb 500 male broiler chicks (924) at average initial weight of 45.8 g fed four diets, each one with seven replicates, in a completely randomized design. Each experimental unit had 33 birds. The diets were: control – corn and […]

In order to evaluate the effect of frutooligosaccharide prebiotic addition on performance, incidence of diarrehea and metabolism of weaned pigs, two experiments were carried out. It was used three diets containing 0.2; 0.4 or 0.6% frutooligosaccharide formulated from basal diet (no addition of frutooligosaccharide), totalizing four experimental diets. In experiment 1, 96 weaned piglets (5.89 ± 0.86 kg) were used to evaluate weight gain, feed intake, feed conversion and diarrhea occurrence on the first 15 days of experiment. In the […]

The purpose of this study was to evaluate the effect of ractopamine and chromium-methionine additions and their combinations in diets for growing and finishing swines on performance, carcass traits and meat quality. Sixty-four Topigs line swines at 26.56 ± 3.11 kg initial body weight were distributed in a randomized block experimental design in a 2 x 2 factorial scheme with two levels of ractopamine (0 and 5 ppm) and two levels of chromium-methionine (0 and 400 ppb), totaling four diets […]

It was evaluated the effect of diets supplemented or not supplemented with ractopamine and digestible lysine on the performance and carcass characteristics of finishing pigs. A total of 50 barrows and 50 gilts (90.2 kg ± 3.5 kg) were used. In the growth performance trial, a randomized block design was utilized in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine (0.68; 0.78; 0.88; 0.98 and 1.08%) and two levels of ractopamine (0 and 5 ppm), […]

This study aimed to investigate the effect of dietary supplementation of oregano essential oil on the performance and on the occurrence of diarrhea in weanling pigs, as well as its antioxidant and antimicrobial activity evaluated in vitro. It was compared four treatments (diets): negative control; positive control, 0.5% ZnO (preventive diarrhea) + 0.05% zinc acitracin (growth promoter); or 0.003% of essential oil of oregano, combined or not with preventive of diarrhea. Weight gain, feed intake and feed conversion were evaluated […]

The recent technologies that have led to the new field of functional genomics (how the genome of an organism regulates homeostasis and responds to stimuli) are providing a clearer understanding of how organisms interact with their environment and in particular their diet. We are beginning to learn how the diet may have long-term influence on performance and health. A form of epigenetic regulation has been recently described called fetal “programming”. Fueled by epidemiological data the “fetal origins” hypothesis suggests that […]

Although fish nutrition science is far from establishing general standards of nutritional requirements, the need for developing low impact feeds has long been included in the agenda of aquaculture’s international scientific and business communities of. Not only is absolutely possible to formulate environmental friendly feeds, as it is necessary modeling the formulation of these feeds. However, it is necessary higher accuracy to develop species-specific formulations, considering interactions of the biology and nutritional physiology of the species with the feedstuffs and […]

Significant progress in the area of animal production is due to the development of researches on genetics, environment, health, management and nutrition. The search for better management conditions that benefit animal welfare resulted in changes to the installation. The genetic improvement more productive animals has encouraged the number of searches to reduce the incidence of diseases, mainly of metabolic origin. The incorporation in products with higher bioavailability as industrial amino acid and organic minerals, the inclusion of products modifiers enteric […]

Healthy animals normally eat sufficient food to satisfy their energy requirements. It is one of the jobs of the nutritionist to ensure that all other nutrient needs have been met when animals stop eating because they have met their energy needs. While dogs and cats are members of the biological order Carnivora, scientific observation and research support that differences in their metabolism and nutritional requirements exist. However, the goal in feeding both species is the same; to optimize the health […]

This work aimed at determining the influence of roughage proportions and fat source of the diet on characteristics of carcass and comercial cuts of lambs. It was used 24 non-castrated Santa Inês male lambs, ad libitum fed diet with two proportions of roughage (30 and 70%) and fat (no fat, protected fat, and soybean) slaughtered at an avarage body weight of 35.4 kg (± 1.5 kg). Animals fed 30% roughage diet showed the highest weights and carcass yields. The percentages […]