The objective of this study was to economically evaluate feedlot finished steers and young steers from two genetic groups: 5/8Charolais (CH) 3/8Nellore (NE) and 5/8NE 3/8CH. The average age of animals at the end of the experimental period was 22.8 and 15.2 months for steers and young steers, respectively. Animals were maintained in the feedlot until reach the previously established slaughter weight of 430 kg. Animals were fed a diet containing a forage:concentrate ratio of 60:40 with the following chemical […]

This trial was conducted to study the effects of pre and postnatal feed restriction on growth and production of Santa Inês lambs from birth to weaning. Sixty-eight lambs were assigned to three treatments as follows: prenatal feed restriction (PRER), postnatal feed restriction (POSTR), and no feed restriction (Control). Average birth body weight of lambs on Control (4.628 kg) and POSTR (4.421 kg) treatments were similar but higher than that of animals on PRER (3.024 kg). Milk replacer intake averaged 1.308, […]

The objective of this trial was to study the effects of recombinant bovine somatotropin on milk yield and composition, blood metabolites and hormonal profile in lactating goats. Twenty-four Toggenburg goats were assigned to one of two treatments as follows: T1 (n=12) received injection of 250 mg of r-bST, every 14 days (four injections), and T2 (n=12) received injections of saline solution (control). No significant differences on milk yield and composition (fat, protein, and dry extract) were observed comparing r-bST-treated goats […]

This experiment was conducted to evaluate the effects of pre and postnatal feed restriction on growth and production of Santa Inês lambs from weaning to slaughter. Forty-eight lambs were assigned to three treatments as follows: lambs with prenatal feed restriction (PRER), lambs with postnatal feed restriction (POSTR), and lambs with no feed restriction (Control). Average daily feed intake (as fed basis) of lambs on POSTR treatment (624 g/d) was significantly lower (P<0.05) than that of lambs on control (757 g/d) […]

The effects of feeding different calcium levels and limestone particle sizes on body and morphometric development of the digestive tract in replacement pullets were evaluated in this trial. One thousand and four hundred Lohmann LSL replacement pullets were assigned to a complete randomized design with a 5 x 2 factorial (calcium levels and limestone particle size) and five replicates of 28 and 18 birds/plot, respectively, for the periods from 3 to 7 and from 8 to 12 weeks old. The […]

The objective of this trial was to evaluate carcass traits of 56 bulls from three genetics groups averaging 18 months of age and receiving two feeding levels. Twelve bulls were slaughtered in the beginning of the study and used as reference animals. The remaining 16 genetically improved Nellore, 12 ordinary Nellore, and 16 genetically improved Caracu averaging 404, 345, and 434 kg of initial body weight, respectively, were randomly assigned to a completely randomized designed with a 2 x 3 […]

One experiment was carried out to determine the lysine (Lys) and metabolyzable energy (ME) levels for breeding gilts. One hundred and eight Seghers® gilts (Large-White x Landrace/Large-White) were alloted to a complete randomized design with a 3×3 factorial design, three levels of Lys (0.55, 0.75 and 0.95%) and three levels of ME (3,100, 3,250, and 3,400 kcal ME/kg). The treatments were the same from the beginning of trial (housing) to the slaughter (30 days of gestation). There was only effect […]

The experiment was carried out with the objective of determining the apparent and true ileal digestibilities of amino acids from five different poultry by-product. Ten crossbreed swines, castrated males, averaging 31.11 ± 3.88 kg were used in the experiment. The animals were previously submitted to the surgery for simple T canula implantation and, then, allotted to a randomized block design with five treatments, four replicates and one animal per experimental unit. At the end of the first and second replicates, […]

This work had the objective to evaluate phenological and productive aspects of native (Adesmia latifolia, A. tristis) and exotics legumes (Lotus corniculatus, L. uliginosus, Trifolium repens) as for the phenological stage on first-cutting: vegetative (CEV) and flowering (CEF). The plants were established as monoculture in the field and evaluated between May/2000 and September/2001, in Passo Fundo, Rio Grande do Sul. After the first cutting the plants were defoliated in 45 days intervals. There were nine cuttings in CEV-management and seven […]

The objective of this trial was to evaluate the effects of three concentrate protein levels (15, 20 or 25% CP) on measurements of carcass and Longissimus dorsi muscle, weights and yields of cuts, and chemical composition and tenderness of meat of Suffolk lambs in creep feeding. Fifteen single birth lambs were used in this study. Lambs were slaughtered when they reached a final body weight of 28 kg. After slaughter, carcasses were maintained in a refrigerator at 5ºC for 24 […]