The purpose of this study was to determine the N-corrected apparent metabolizable energy (EMAn) of alternative protein ingredients, for newly hatched chicks, and to evaluate the effects of the utilization of these ingredients in the first week broiler feed, on the performance and gastrointestinal tract (TGI) development. In the metabolism trial, 288 male chicks from 4 to 7 days were allotted to a completely randomized design with six treatments (a reference diet and five diets with inclusion of the test […]

Fifty barrows (30.10 ± 0.48 kg to 60.08 ± 0.49 kg live weight were assigned to a completely randomized blocks design, with five digestible methionine plus cystine levels (0.448, 0.490, 0.531, 0.573, and 0.615%), five replicates and two animals per experimental unit, to evaluate the requirement of digestible methionine plus cystine The digestible methionine and cystine levels of the diet influenced the average daily gain that increased in a linear way. However, the linear response plateau model was what best […]

This work aimed to evaluate the effect of protein source origin and lysine and methionine or phosphorus and calcium supplementation to Nile tilapia during sex reversal phase. Two hundred fries were assigned to a completely randomized design with four treatments and five replications, in twenty 12 L aquarium. One aquarium with 10 Nile tilapia fry was considered an experimental unit. Morning and afternoon temperatures, dissolved oxygen, pH and electric conductivity was 22.6 ± 0.1ºC, 24.1± 0.4ºC; 6.77 ± 0.38 mg/L, […]

Eight Jersey cows with an average live weight of 420 kg, yielding around 20 kg of 3.5% FCM in early lactation (around the peak of lactation) were used in a trial whose objectives were to evaluate rice bran as fat source associated with oil or tallow in iso-proteic, iso-fibrous and iso-lipidic diets on the apparent digestibility of nutrients. Four treatments were used: CON concentrate without fat addition; BPF- concentrate with “by pass” fat; RBO- concentrate with rice bran + rice […]

Thirty-six young bulls (12 Nellore, 12 ½ crossbred Holstein x Nellore, and 12 crossbred ½ Caracu x Nellore) were used to evaluate weight gain, feed conversion, ingestion capacity and apparent digestibility of various nutrients. We use growing and finishing animals. The growing animals had initial weight of 205 kg, and the finishing ones, initial weight of 310 kg. The animals were fedlot to reach the weight of 310 to 330 kg for the growing animals and 450 to 480 kg […]

The intake, digestibility, ruminal pH and ammonia concentrations and passage rate were evaluated in steers fed corn silage (CS) and Tifton 85 bermudagrass hay (T85H)-based diets, at different forage proportions. Four rumen fistulated steers with 523 kg of live weight were used in a 4×4 latin square design, and fed diets containing 60:40 forage:concentrate proportions in dry matter basis. The forage portion consisted of: 100 T85H:0 CS; 67 T85H:33 CS; 33 T85H:67 CS and 0 T85H:100 CS. The dry matter […]

The objective of this study was to evaluate the meat centesimal composition of Santa Ines pure breed and Santa Ines vs Texel crossbreed lambs, slaughtered at different body weights. Thirteen males and fourteen females from both breeds were selected. The muscle biceps femoris was used to determine water, crude protein, crude extract and minerals contents. The experiment was arranged randomly, with 16 traits in a 2x2x4 factorial scheme with two genetic groups, two genders (14 males and 13 females in […]

The objective of this experiment was to evaluate the effects of different dietetic fiber physical effectiveness on the retention time and apparent digestibility of lactating dairy cows. Ten Holstein cows (average 550 kg of live weight) were allotted to a switch back experimental design in three successive periods. The animals were individually housed in a tie stall and fed with total mixed rations constituted by Tifton hay (50.4%) and concentrated (49.6%). The Tifton hay was ground in commercial miller with […]

This work aimed to evaluate the physical-mechanic characteristics of crossed sheep leathers from hairy tropical crioula ewes mated with Texel wooly breed (TE) and Santa Inês (SI) hair tropical breed rams. Twenty two skin were evaluated from male sheep slaughtered at average of 240 days of age and 21.9 ± 4.4 and 20.9 ± 3.4 body live weight, respectively for TE and SI. After skinning, pelts were weighed, conserved in brine and salted and classified by quality before the chromium-tanned. […]

The physical-mechanic industry characteristics of 22 crossed goat leathers from native does mated with Anglo Nubian (AG) and Boer (BO) bucks were studied to evaluate the leather quality by analysis of tension and tear resistance. Animals were slaughtered at average of 260 days of age and 22.0 kg of live body weigth. After skinning, the pelts were weighed, conserved in brine and salted and classified by quality before the chromium-tanned. To evaluate the tension and tear resistance assays, from the […]