ABSTRACT – The research was carried out to determine body composition and calcium and phosphorus requirements of Santa Ines lambs. Eighteen entire male lambs with average initial live weight of 15 kg were used. The animals were allotted to three groups: six animals were slaughtered at the beginning of the experiment, to access the amount of calcium and phosphorus present in the body, as reference animals for the comparative slaughter technique. Six animals were ad libitum fed and six were […]

ABSTRACT – Thirty six lambs (18 male and 18 female) from three different genetic groups: 12 lambs Texel x Bergamacia, (T B), 12 lambs Texel x Santa Inês (T S) and 12 lambs pure Santa Inês (SI) were fed with three different experimental diets: A – without coffee hulls; B – with in natura coffee hull and; C – with coffee hull, treated with urea and whole ground soybean seed. The hot carcass weight (CQ), cold carcass weight (CF), hot […]

ABSTRACT – Sixty-nine lambs from the crossbreeding Corriedale or Polwarth ewes with Suffolk, Ile de France rams or from the same ewe breed were used to evaluate their performance and carcass characteristics. Lambs were maintained under grazing until weaning time (60 days), then were confined for 90 days and fed corn silage and concentrate based diet. A completely randomized design in a factorial arrangement was used. The use of meat type rams on fine wool ewes did not affect lamb […]

ABSTRACT – The effects of different concentrate levels on the ingestive behavior were studied with five rumen and abomasum fistulated Holstein bull calves, with average initial age of 10.8±0.8 months and average 233.4±26.1 kg BW. The animals were housed in individual stalls and ad libitum fed diets containing 30, 45, 60, 75 and 90% of concentrate, on DM basis. The diets contained, approximately, 16% CP were formulated for body weight gain of 1.0 kg/day and constituted of soybean meal corn […]

ABSTRACT – With the objective to increase the germoplasm availability for forage production, 215 accessions of the genus Paspalum collected in different regions and introduced at the Embrapa Southeast – Cattle Research Center, located at the central region of the São Paulo state. These accessions were evaluated and selected based on their yields in the first year, of dry matter from the vegetative development throughout the year and during the period of high and low rain preciptation. The accesses were […]

ABSTRACT – This work was conducted to evaluate the effects of different concentrate levels on the liquid passage rates, using Co-EDTA, and particulate, using ytterbium chloride and Cr-mordant, and the in situ ruminal degradation kinetics of dry matter (DM) and crude protein (CP). Five rumen and abomasum fistulated bull Holstein calves, with an initial average age of 5.8±0.7 months and initial average of 107.4±11.0 kg LW were allotted to a 5×5 Latin square design (treatment x period). The animals were […]

ABSTRACT – This work was conducted to evaluate the effects of different concentrate levels on the parameters of at ruminal fermentation, the apparent, total, ruminal and intestinal N digestibilities, the microbial efficiency and the N balance. Five rumen and abomasum fistulated bull Holstein calves, with an initial average age of 5.8±0.7 months and initial average of 107.4±11.0 kg LW were allotted to a 5×5 Latin square design (treatment x period). The animals were housed in individual stalls and full fed […]

ABSTRACT – This work was conducted to evaluate the effects of different concentrate levels on the voluntary intake and the apparent total and partial digestibilities of dry matter (DM), organic matter (OM), ether extract (EE), neutral detergent fiber (NDF) and total carbohydrates (TCH), in the rumen and in the intestines. Five rumen and abomasum fistulated Holstein calves, with initial average age of 5.8±0.7 months and initial average of 107.4±11.0 kg LW were allotted to a 5×5 Latin square design (treatment […]

ABSTRACT – The present work was conducted to evaluate the effect of constant thermal environment on the performance and physiological traits of barrows from 30 to 60 kg LW. A total of 100 animals were allotted to a randomized block design, with five treatments (3100, 3250, 3400, 3550 and 3700 kcal of DE/kg of diet), five replicates and two animals per experimental unit. Weight gain, intakes of diet, protein and energy and feed:gain ratio and the efficiencies of protein and […]

ABSTRACT – This experiment was conducted to evaluate the use of low nutritional quality corn grain, infested with insects or fungi on the performance of broilers in starter diets. A total of 400 not sexed Ross chicks was allotted to a completely randomized design with five treatments and four replicates, according to the corn grain quality used in starter diets (1 to 28 days). The non infested corn was used in the control diet, and substituted by levels of 20 […]