An experiment was conducted to evaluate the use of animal by-products in broiler diets, formulated based on crude and ideal protein. The experimental design was a completely randomized in a factorial arrangement 2×2+1, with two animal protein sources (poultry viscera meal and bovine blood meal), two formulation concepts (based on crude and ideal protein) and a control diet based on corn and soybean meal, with four replications. The evaluated characteristics were weight gain, feed intake and feed: gain ratio. There […]

An experiment was conducted to evaluate the use of animal by-products in diets of broilers from 22 to 42 days of age, formulated based on crude and ideal protein concepts. The experimental design was a completely randomized in a factorial arrangement 2×2+1 with two animal protein sources (poultry viscera meal and bovine blood meal), two formulation concepts (based on crude and ideal protein) and a control diet based on corn and soybean meal, with four replications. The evaluated characteristics were […]

The effects of two levels of L-glutamic acid (L-Glu) combined with four levels of vitamin K (Vit K) were studied with the objective of evaluating the activities of a-amylase in the chyme and pancreas of chicks. Day-old male broilers were reared in eletrically heated batteries, fed with purified amino acids diets, minerals and vitamins (except Vit K) at the requirement levels, for 14 days. Feed and water were provided ad libitum. The experimental design was a factorial 2×4 with four […]

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 […]

Two experiments were carried out to study the digestibility of starch and the specific activity of amylase (ACAMY) and maltase (ACMAL) enzymes in two portions of small intestine (jejunum and ileum), in rabbits with initial ages of 28 and 49 days, fed with four sources of starch (corn, sorghum, triticale and cassava) processed or not by extrusion. Sixty-four White New Zealand rabbits were used in each experiment, distributed in a completely randomized design with eight treatments and eight replications. At […]

The aim of the study was to maximize the egg production and quality and minimize nitrogen excretion of laying hens in the end of the first production cycle through the supply of adequate levels of crude protein (CP) and total sulfur amino acids (TSAA) in the diet. Four hundred and thirty two Isa Brown hens 52-w old were assigned to a completely randomized experiment design in a 3 x 3 factorial arrangement (CP and TSAA), with nine treatments (14 and […]

The objective of this work was to establish a model to estimate the metabolizable energy (ME) requirements for laying hens from Lohmann LSL line, by the factorial method. To determine the influence of ambient temperature on ME requirements for the maintenance, experiments were accomplished in environmental controlled rooms at constant temperatures of 12, 22 and 31 ºC, by the comparative slaughtering technique. The net energy for weight gain was determined by regression of carcass energy content in function of body […]

An experiment was carried out to evaluate supplementation of sorghum straw (SS) with poultry litter (PL) in a single offering/day, and minerals and their effects on feed intake, sorghum straw dry matter disappearance (DMD) in nylon bags and rumen liquid ammonia N concentration. A 4×4 latin square design with 17-day periods and four rumen fistulated stalled cows was used to compare four treatments: (0) SS alone, (M) SS + mineral mixture offered ad libitum (P) SS + 1 kg/day of […]

This work aimed to evaluate body measures of colts and fillies of Mangalarga Marchador breed with principal components analysis. Measures were performed at birth week, in 55 colts and 41 fillies; at six months of age, in 35 colts and 37 fillies; and at twelve months of age, in 19 colts and 31 fillies. There were made 25 linear measures, including height, length, width and girth, and 11 angular measures. Evaluation of animals with 12 months of age was made […]

This work aims to evaluate the body measures of colts and fillies of Mangalarga Marchador breed using a discriminant analysis. Measures were performed at birth week, in 55 colts and 41 fillies; at six months age, in 35 colts and 37 fillies; and at twelve months age, in 19 colts and 31 fillies. There were made 25 linear measures, including height, length, width and girth, plus 11 angular measures. Discriminant analysis was used to verify morphologic differences between the animals, […]