The trial was carried out to evaluate the performance and mineral levels in the litter of broilers from 1 to 21 days old, fed diets with low-crude protein (CP) and low available phosphorus (AP) supplemented with synthetic amino acids and phytase. A total of 1-d 1.500 male Cobb broiler chickens averaging initial weight of 42.5 g was allotted to floor pens as a complete randomized blocks design, with 3 x 3 + 1 factorial arrangement, being three levels of CP […]

The objectives of this trial were to determine the apparent digestibility coefficients (ADC) of crude protein and amino acids for two species of free floating aquatic macrophytes (Eichhornia crassipes and Pistia stratiotes) by Nile tilapia (Oreochromis niloticus) and to determine the water quality of digestibility aquariums in relation nitrogen and phosphorus concentrations. Tree feeds were developments, containing 0.10% of chromic oxide – III, one being the reference diet (purified) and the others containing 30% of aquatic macrophytes. The Nile tilapias […]

A trial was conduced to evaluate decreasing levels of CP with amino acid supplementation on performance of gilts on thermoneutral environment. Thirty-five crossbreed gilts (Landrace x Large White) averaging initial weight of 60.5 kg were allotted to a complete randomized design with five treatments (17.3, 16, 14.7, 13.4 and 12.1% of CP) of seven replications (one animal per experimental unit). The experimental diets were fed ad libitum until the end of the experiment when the animals reached the average weight […]

The experiment was carried out with the objective of determining the apparent and true ileal digestibilities of amino acids from five different poultry by-product. Ten crossbreed swines, castrated males, averaging 31.11 ± 3.88 kg were used in the experiment. The animals were previously submitted to the surgery for simple T canula implantation and, then, allotted to a randomized block design with five treatments, four replicates and one animal per experimental unit. At the end of the first and second replicates, […]

An study was conducted to evaluate the influence of reduction of crude protein (CP) levels and amino acid supplementation in diets on the performance of castrated swines (Landracex Large White) maintained in a termoneutral environment. Fifty crossbreed piglets (average initial body weight of 30.2 kg) were allotted to a completely randomized experimental design with five treatments (17, 16, 15, 14 and 13% CP) and five replications and two animals per experimental unit. Experimental diets and water were fed ad libitum […]

Three assays were carried out to determine methionine + cystine requirement and the digestible methionine + cystine: digestible lysine ratio of males broilers, Avian Farms, from 1 to 20, 24 to 38 and 44 to 56 days of age. Each experiment was a completely randomized design with five levels of methionine + cystine, six replications and 20 birds per pen from 1 to 20 and 24 to 38 and 16 birds per pen from 44 to 56 day of age, […]

The experiment was carried out to determine the apparent and true ileal digestibility of amino acids from six different meat and bone meals. Twelvecrossbred swines, castrated males, averaging 52.5 ± 5.1 kg initial weight, were used. The animals were previously submitted to the simple T canula surgery implantation at the terminal ileum and, after twenty days of recovery period, they were allotted to a randomized blocks design, with six treatments, four replicates and one animal per experimental unit. At the […]

The experiment was carried out with the objective of evaluating the ileal endogenous losses of amino acids in function of different fiber levels inclusion in a free protein diet. Were used eight crossbreed swine, castrated males, averaging 50.17 ± 4.10 kg initial weight, submitted previously to the simple T canula surgery implantation, allotted to a randomized blocks design, with four treatments, four replicates and one animal per experimental unit. The treatments consisted in a free protein diet with four levels […]

One experiment was conducted to evaluate the influence of reduction of the crude protein (CP) level of ration with amino acid supplementation on performance of castrated males swines maintained in a termoneutral environment (22ºC). A total of sixty crossbred swines (Landrace x Large White), with average initial weight of 15.0 kg and 53.1 days old, was allotted to a completely randomized design with five treatments (18, 17, 16, 15 and 14% CP), six replications and two animals per experimental unit. […]

One experiment was conducted to evaluate different amino acid (AA) and calcium (Ca) levels for broilers from 22 to 42 days of age. Evaluated the performance, carcass yield and calcium excretion. Five forty hundred birds, Male broilers Cobb, were randomly assigned to 6 treatments in a 3×2 factorial arrangement, considering the factors AA (100, 125 and 150% NRC, 1994) and Ca (75 and 100% NRC, 1994), in three replications of 30 birds each. The studied AA were methionine, methionine+cystine, lysine […]