ABSTRACT ¾ The contents of Mn, Fe, Zn, Cu, Co, Mo and Pb of soil, predominant forage in the pastures and water, were studied in the North and Northwest regions of Rio de Janeiro State, during the dry (June-July) and rainy (December-January) seasons. Samples of soil, forage and water were collected in 12 different points of the regions, in predominant grazing areas, as determined by satellite photograph and according to different soil characteristics. The mineral contents of the sample extracts […]

ABSTRACT – The chemical composition and in situ dry matter (DM) and neutral detergent fiber (NDF) of bulky fraction (stall and sheets) degradation of 28 corn hybrids in 1996, and 21 hybrids, in 1997, were studied to establish the correlation among the analyzed factors. From the 21 hybrids selected in 1997, 13 were part of the experiment in 1996. The model for the evaluation of in situ DM degradation kinetics (McDonald, 1981), and the model to analyze the in situ […]

ABSTRACT – The effect of the combination of energy sources (corn or cassava hull) and protein sources (cottonseed meal or yeast + meat and bone meal) in four diets, using corn silage as forage source, on the performance and intake of DM, CP, OM, ME, ADF, NDF, starch, Ca and P, using heifers. The effect of the addition salt or mineralized salt was also evaluated. A total of 28 heifers with average 303 kg LW and 18 months of age, […]

ABSTRACT – The objective of this study was to evaluate the effect of the substitution of corn by cassava bagasse in the concentrate on dry matter, organic matter and crude protein intake in growing cattle. Sixteen crossbred bulls were allotted to a completely randomized block design, in two periods. Four types of concentrate were tested in association with an ad libitum allowance of oat/ryegrass hay (Avena strigosa, L.; Lolium multiflorum, L.)and an average concentrate supplementation of .83% LW. The concentrates […]

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 – The objective of this study was to evaluate the effect of the substitution of corn by cassava bagasse in concentrate on apparent digestibility, digestible nutrient intakes, average daily gain (ADG) and feed:gain ratio (F:G) in growing cattle. Sixteen cossbred bulls, were allotted to a completely randomized block design and in two periods. Four types of concentrade were tested, in association with an ad libitum allowance of oat/ryegrass hay (Avena strigosa, L.; Lolium multiflorum, L.) and an average concentrate […]

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 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 – Twenty-eight heifers, with average 303 kg LW were used to determine the apparent digestibility of dry matter (DM), crude protein (CP), organic matter (OM), gross energy (GE), acid detergent fiber (ADF), neutral detergent fiber (NDF) and starch in diets containing corn or cassava hull and yeast or cottonseed meal plus meat and bone meal, during seven days. The addition effect of salt or mineralized salt to the diets was also evaluated. The acid insoluble ash was used as […]

ABSTRACT – This experiment was carried out to compare the objective and subjective measurements of carcasses from 18 Corriedale and 18 Ile de France x Corriedale lambs, slaughtered at 30 to 32 kg LW. The lambs were weaned at 60 days of age, with 10 to 12 kg LW, finished in feedlot, and were full fed a diet with 15,0% CP and 70,0% TDN. After post-slaughter manipulation and cooled for 24 hours at 4°C, the objective and subjective carcass evaluations […]