Two trials were carried out, Trial I (digestibility) and Trial II (performance). In Trial I, 16 castrated male crossbreed piglets were used. They were weaned at 21days and weighing on average of 6.0kg. Two piglets were kept in each metabolic cage. Studding pre-gelatinized corn meal (PGCM), we found these results: digestibility coefficient of dry matter, crude protein and crude energy was 89.2, 78.7 and 90.2%, respectively. Digestible dry matter (81.8% as-fed basis); digestible protein (6.55% as-fed basis) and digestible energy […]

The objective of this trial was to study the effect of three grazing intervals (T30 = 30 days, T36 = 36 days and T45 = 45 days) on milk yield and live weight changes of crossbred Holstein x Zebu cows grazing elephantgrass pasture rotationally managed. The experiment was conducted during the rainy season using 18 crossbred cows averaging 30 days of lactation and 488 kg of average live weight. The cows were allocated to experimental treatments according to a completely […]

Forty-two crossbred dairy cows or heifers were randomly allocated to two treatments: T1 (n=22) – control group, without hormonal treatment; T2 (n=20) – treated group with buserelin in the fourth day after embryo transfer, to evaluate the effect of hormonal treatment on the pregnancy rate and plasma concentrations of progesterone in bovine embryo recipients. Blood collection samples for plasma obtainment were realized on day of embryo transfer (day 0) and every other day, in a total of five samples per […]

Four hundred and eighty Ross broiler male, with initial weight of 43 ± 0.2 g, from 1 to 21 days of age, were allotted to an experimental design in 2 x 4 factorial arrangement, two environments (high temperature and thermal comfort) and four levels of total lysine (1.1, 1.2, 1.3 and 1.4%) with six replicates and ten birds/experimental unity. Feed intake (FI) and weight gain (WG) were higher in the thermoneutral environment, while the feed: gain ratio (F/G) and the […]

The research aimed to analyze the effects of feed restriction prior to confinement on growth and chemical composition of the carcass and carcass components in cattle. Twenty-four Holstein-Gyr crossbred steers, with 19,3 ± 5,1 months of age and 202,1 ± 49,1 kg LW, at the beginning of the trial were used. Fifteen animals were confined after a 104-day period of forage restriction, in which it was intended to keep body weight unchanged (compensatory gain group), while nine of them had […]

Three methods were compared in the estimate of lignin cell wall contents in different fractions of seven forage species. The methods for assaying lignin were: acid detergent lignin, permanganate lignin and acetyl bromide soluble lignin. The lignin extracted from the forage sample through the acetyl bromide reagent was employed as a reference standard for the spectrophotometric method. There was no agreement among the three methods; in general, the ABSL yielded higher values than the two other analytical procedures while the […]

A study was conducted to evaluate the effects of bST in crossbred dairy cows (Bos indicus x Bos taurus) raised in a semi-arid zone, in the Northeast of Brazil. Fifteen cows (second and third lactation; 42-155 days in milk) received five applications of bST, at 14-day intervals. Other 15 cows were used as controls. The animals were fed with diet consisted in elephant grass and concentrate. During the first application of bST, the milk production of the treated cows (12.6 […]

The intake, total apparent digestibility and ruminal and intestinal apparent digestibilities of diets containing tifton 85 bermudagrass hays (Cynodon spp.) at different regrowth ages were evaluated with cattle. Four rumen and abomasum fistulated steers were allotted in a 4×4 Latin square. All diets consisted in 0 to 40 forage to concentrate ratio. The forage was consisted in Tifton 85 bermudagrass hay of 28, 35, 42 and 56 days of age, and the concentrate contained corn meal and mineral mix. The […]

The experiment evaluated the performance of Charolais (C) and Nellore (N) cows of three age classes, young (3 and 4 years), adult (5 to 7 years) and old (8 or more years), weaned at three (early weaning) or seven months in the fall (traditional weaning). The weight of the cows at the fall was 45 kg higher for the cows weaned at three months (T3) than for the cows weaned at seven months (T7). The body condition at seven months […]

The objectives of this study were to determine the importance of the effects of age of dam (AoD), sex (S) and age of calf (AC), month of birth (M) and the interaction between age of dam and sex (AoD*S) on birth weight (BW) and 205 day adjusted gain from birth to weaning (AWG) of Angus cattle and to estimate correction factors for these effects. Data from 40,915 calves, of which 12,706 were weighed at birth, controlled by the Beef Cattle […]