With the objective to determine the tryptophan nutritional requirements for male and female broilers, during the initial phase, 800 male and female chicks, from 1 to 21 days of age, with average initial weight of 44.7 and 44.6 g, respectively, were used. The birds received a deficient tryptophan basal diet (.180%). A completely randomized blocks experimental design, in a 5 x 2 factorial arrangement (treatment x sex), with four replicates per sex and 20 chicks per experimental unit, was used. […]

Thirty rabbits from New Zealand White breed , 15 males and 15 females, with 50 days of age, were used on assay of digestibility, with the aim to determine the nutritional value of recovery yeast (Saccharomyces sp), dried in a rotational cylinder (RYRC) and by spray-dry (RYSD). The rabbits were assigned to a completely randomized experimental design with three treatments and ten replicates, with one as a reference diet and two test diets. In the elaboration of test diets, the […]

The soybean meal (raw and thermal processed) from soybean cultivar BR 36 with conventional trypsin inhibitor activities levels (standard) and the soybean line BRM95-5262 that was genetically selected to contain low trypsin inhibitor activities were used in a biological assays with chicks. The BR 36 and BRM95-5262 soybean meal (thermal processed), used in the assays contained, respectively, 40 and 20, and 30 and 20% of relative residual trypsin inhibitors activities. The mean values of PER, NPR and feed: gain showed […]

A trial was conducted to evaluate the influence of antinutritional factors in some feedstuffs on broiler chick’s performance and intestinal epithelium. A total of 480 one-day old broiler chicks were allotted to a completely randomized experimental design with four treatments (A= corn and soybean meal based control diet; B = diet containing Leucaena leucocephala – 6% [LL]; C = diet containing Leucaena cunningan – 6% [LC] and D = diet containing Pigeous bean – Cajanus cajan – 20% [CC]), four […]

An experiment was conducted with the objective to evaluate the effects of the induction of the drinking water with sweetener consumption in the nursery phase (10th to 30th day of age), on the performance of 270 piglets (male and females) submitted to segregated early weaned and its residual effects on their pre nursery (30th to 45th day) and nursery phases (45th to 62nd day) were evaluated. A completely randomized design in a 3 x 2 factorial arrangement with three treatments […]

The objective of this work were to estimate the requirement of lysine from 0 to 6 weeks and to evaluate the posterior effect on the performance of two egg-type strains. Three hundred egg-white pullets from 0 to 6 week of age and three hundred egg-brown pullets from 0 to 6 week of age were allotted to a randomized block design with five treatments and four replicates. A basal diet with 18.50% of crude protein (CP) and 2900 kcal metabolizable energy […]

The objectives of this work were to estimate the requirement of lysine from 7 to 12 weeks and to evaluate their effect on the egg production phase. Two hundred egg-white pullets (EW), and two hundred egg-brown pullets (EB) strains were allotted in randomized block design, and fed a basal diet with 16.0% of crude protein (CP) and 2,900 kcal/kg metabolizable energy (ME), supplemented with L-lysine HCl for the level of 0.50, 0.55, 0.60, 0.65, and 0.70% of total lysine in […]

The objective of this work was to estimate the requirement of lysine from 13 to 20 weeks and to evaluate the posterior effect on the performance of two egg-type strains. Three hundred egg-white pullets from 13 to 20 weeks of age and three hundred egg-brown pullets from 13 to 20 weeks of age were allotted to a randomised block design with five treatments and four replicates. A basal diet with 14.0% of crude protein and 2900 kcal metabolizable energy/kg was […]

The effect of slaughter age on non-carcass components and carcass characteristics was evaluated in 35 Suffolk lambs slaughtered at average age of 90, 130 or 170 days, fed corn silage and concentrate (19.6% CP). As the slaughter age increased, animal live weight and carcass weight linearly increased, and some non-carcass components as blood, head, legs and full viscera percentage linearly decreased, leading to a linear increase in carcass yield. As the slaughter age increase, it was observed change in the […]

The ingestive behavior patterns were evaluated using nine sheep 1/2 Texel+1/2 Ile-de-France over a six-month period. Sheep were fed the diet at 9 a.m. and 4 p.m., which was composed by 250 g of concentrate (15.45% CP, 36.54% NDF) and ad libitum grass hay (6.69 % CP, 69.10 % NDF). The ingestive behavior was continuously measured by five days per period, and its activities or states were classified as eating, ruminating or idling, and sequentially registered. The time series was […]