The objetive of this study was to compare the first calving performance of Nellore and F1 crossbred cows. Data used in the study came from 741 calving of Nellore and F1 cows born from the matting of Nellore cows with sires of the breeds Aberdeen Angus, Brangus (black and red), Canchin, Nellore, Gelbvieh and Simental born from 1989 to 1993. The information about 566 calves born from 1991 to 1995, from the matting of these females with the Aberdeen Angus, […]

This work was carried out to estimate stability parameters of milk production using data from “Associação de Criadores de Gado Holandês de Minas Gerais (ACGHMG)”. Animals from different genetic groups of the Holstein breed (31/32, GC1, GC2 GC3, >GC4 and PO), with different regions (15, 25, 35, 45, 55, 65 and 75) and with two management systems. The database was defined by 22560 animals milk production up to 305 days, from 1989 to 1996.The following animals criteria was used to […]

The objective of this work was to evaluate the intake and apparent digestibility of nutrients of elephant grass forages, alfalfa and coast-cross grass hays in adult horses. Eighteen adult Mangalarga Marchador mares were allotted to a completely randomized design with three treatments that consisted on diets with the following forages: T1 – elephant grass, T2 – alfalfa hay, T3 – coast-cross grass hay. The animals were ad libitum fed twice a day. The experimental period was constituted by a phase […]

The objective of this work was to determine the apparent metabolizable energy (AME) and nitrogen-corrected apparent metabolizable energy (AMEn) of meat and bone meal (MBM) with different particle sizes (coarse, medium and fine), in two levels of substitution (20 and 40%) for broiler chicks. Two hundred and eighty broiler chicks with 15 days of age were allotted to a completely randomized design, with seven treatments (six treatments with meat and bone meal and a reference diet), four replicates and ten […]

Twenty-five gilts, from 30 to 60 kg LW, maintained in cold environment, were used to evaluate the effect of levels of digestible energy (DE) from 3100 to 3700 kcal/kg of diet on the performance, carcass composition and blood serum concentrations of free T3. The daily weight gain was not influenced by the dietary DE level, however, linearly influenced the dietary and protein intakes. The feed:gain ratio linearly improved with the increased of the dietary ED level. The DE intake linearly […]

Four metabolism assays were carried out to btain information on the nutrient digestibility of horses feeding. Geldings without definite breed, with average of six years of age, were used. In the experiments were tested: (1) sugar cane; (2) a combination of 59.0% of sugar cane and 41.0% of whole corn grain; (3) elephant grass; (4) and sugar cane with 1.5% of urea. The average DM intake was .89, 1.11, 2.02 and 1.03% LW for sugar cane, sugar cane plus whole […]

This research was conducted to determine the minimum endogenous losses, the nutritional requirement of phosphorus (P) for maintenance, the biological availability of P from dicalcium phosphate and the variation of plasma P concentration in swine of 20 kg LW. The pigs were fed diets containing different levels of total phosphorus (.30, .40, .51, .65 and .73%). Twenty commercial crossbred barrows were maintained in metabolic cages for a seven-day period of adaptation and seven days of total collection of feces, urine […]

This research was conducted to study the kinetic of phosphorus (P) in tissue of swine growing phase fed diets containing crescent levels of total phosphorus (.30, .40, .51, .65 e .73%), using 32P as tracer. The rate of 32P retention and the relative specific activity and standard in the bone, liver, heart, kidney and muscle were the markers of inorganic P concentration. Ten commercial crossbred barrows, with 20 kg, were allotted to a completely randomized design in a split plot […]

This experiment was conducted to evaluate the effect of the addition of different levels of fumaric acid to diet (.0, .5, 1.0, 1.5, and 2,0%) on the performance of growing rabbits. Fifty rabbits of White New Zealand breed, 25 males and 25 females, from 40 to 80 days of age were alloted to a randomized blocks experimental design with five treatments and ten replicates with one animal per experimental unit. The addition of fumaric acid to the diets did not […]

Performance and physiological data from 100 crossbred female piglets, 50 maintained in a termoneuter environment (21.4±1.00°C) and 50 in a high temperature environment (32.0±.88°C), allotted to a randomized blocks design, with five replicates and two animals per experimental unit, fed diets with five levels of digestible energy (3100, 3250, 3400, 3550 and 3700 kcal of dietary ED/kg), were evaluated. The animals which were exposed to the temperature of 32ºC had reduced weight gains and feed, protein and energy intakes. The […]