The objective of this experiment was to evaluate the effect of replacing corn silage with sunflower silage (0, 33 e 66% DM) on the ingestive behavior of fedlot steers. Nine castrated steers were used, with average 288 kg initial live weight and 20 month old from the Nellore (N), 21/32Charolais (C) 11/32N and 21/32N 11/32C genetic groups. A randomized complete block experimental design was used, with three replications per treatment. The tested diets were: 100% corn silage and 0% sunflower […]

The objective of this experiment was to evaluate the nutritive value, animal performance and feed conversion of beef cattle steers grazing Panicum maximum Jacq. cv. Tanzania pasture subjected to intensities of rotational grazing. Treatments corresponded to two grazing intensities (post-grazing residues of 25 and 50 cm) associated with a grazing interval corresponding to the time necessary for a 95% canopy light interception (LI) condition during regrowth. A randomized complete block design was used, with two replications. The pre-grazing sward height, […]

The objective of this research was to evaluate the performance, carcass yield and intestinal morphometry of broiler chickens raised under different temperatures that received feed with or without yeast extract and prebiotic in the pre-initial phase. One thousand four hundred and forty one-day old male chicks were used, raised in different climate chambers. Feed with or without the addition of yeast extract and prebiotic was offered only in the pre-initial phase (1 to 7 days). From the eighth day on, […]

The effect was assessed of including licuri and castor oils in the diet on the production and chemical composition of milk from goats and the economic viability of the diets. Crossbred Moxotó goats in a 5 × 5 Latin square design were used with two replications consisting of five diets: a control treatment without supplementary oil (control), and the others with 3% or 5% licuri or castor oil. Milk production decreased with the inclusion of 5% licuri oil, but it […]

An experiment was conducted with the objective of evaluating the levels digestible lysine for chickens in the starting phase (1 to 21 days of age), using two eletrolytes balances. Eighty hundred male Cobb broilers were used, allotted in a randomized complete design in a 2 × 5 factorial arrangement consisting of five levels digestible lysine levels (1.021; 1.276; 1.531; 1.786; 2.042) and two electrolyte balances (190 and 255 mEq/kg), with four replications and 20 chicks per experimental unit. There was […]

The objective of this study was to identify and to correlate parameters that characterize puberty and estimate the age and weight of Suffolk ewe lambs in Mato Grosso do Sul. This study was carried out with twenty-two Suffolk ewe lambs for 256 days. Blood samples were collected from the jugular vein and centrifugated and the plasma were stored at -20°C until analysis of progesterone (P4) concentration by radioimmunoassay (RIA). The morphometric measurements included: head length and width, body length, elbow […]

The objective of this study was to evaluate the reproductive performance of ewes supplemented with organic or common mineral salt in the breeding season, and the effect on metabolic constituents of the blood. The experiment was carried out from November 2005 to May 2006 using 40 Ile de France breed ewes. During the breeding season, sheep grazed on two native pasture areas of 15 ha each and were distributed in two groups, depending on the supplementation: submitted to treatments: receiving […]

The morphological characteristics of perennial ryegrass (Lolium perenne cv. Nui), cocksfoot (Dactylis glomerata cv. Vision) and red clover (Trifolium pratense cv. Pawera) in response to four shade levels (0, 25, 50 and 75%) and two shade patterns (continuous and alternate) were assessed in three growth periods (establishment, first regrowth and second regrowth), in New Zealand, to evaluate the adaptation of different species to changes in the light environment. The experiment was conducted in a randomized complete block design, with three […]

The objective of this study was to evaluate the effect of different ways of administering probiotic on performance, carcass yield and small intestine microbial population of meat quail. One thousand and fifty quails, one-day old males and females were used, distributed in a randomized completedesign with three treatments (control, probiotic in drinking water and probiotic in feed) and five replications of seventy quail each. Every seven days, the quails were weighed to evaluate weight gain (WG), feed intake (FI), feed […]

This study evaluated body fat, protein and energy contents and nutritional requirements for body weight (BW) gain of lambs in tropical semiarid conditions. Thirty-two castrated Santa Inês 3-to-4-month old lambs (initial BW: 15.8 kg ± 1.4 kg) were used. Eight lambs were initially slaughtered to serve as the reference for initial body weight composition. The remaining 24 animals were placed in a randomized block with three treatments and eight replications. Each one of the eight experimental blocks consisted initially of […]