Three protein sources (urea – U; feather meal – Fm; soybean meal – Sm) associated to two sorghum silage (sorghum at high cutting – SHC; and sorghum at low cutting – SLC) were evaluated by measuring beef calf performance, confined for 84 days. Thirty-six crossbred (Charolês/RedAngus/Nelore) castrated calves, with five months of age and average weight alive on the 146.44 kg, were used. Average daily weight gain (DWG); the dry matter intake expressed in kg/day (DMI), percentage live weight (DMILW) […]

The objective of the experiment was to study the carcass and meat quantitative characteristics of 157 Charolais steers, slaughtered at two years of age, classified in four groups according to the average daily weight gain (ADG) pre and post seven months: “high-high” = steers with ADG ³ .5 kg from birth to slaughter, “low-low” = steers with ADG < .5 kg from birth to slaughter, “high-low” = steers with ADG ³.5 kg before seven months, and ADG < .5 kg […]

Simple linear regressions to estimate empty body chemical composition of Santa Gertrudis young bulls were obtained, using the physical and chemical composition of the 9-10-11th ribs cut. Fifteen intact males, from nine to fifteen months of age and from 220 to 505 kg of liveweight, were kept confined. They were slaughtered after 18 hours without water and food, and six of them were slaughtered after adaptation period. The content of water, protein, lipid and ash were determined on the ribs […]

The objective of this experiment was evaluate the ruminal degradation kinects and effective degradability (ED) of dry matter (DM) and crude protein (CP) of four experimental diets, with different substitution levels (0, 20, 40 and 60%) of corn silage by pineapple by-products silage. It was evaluated pineapple by-products silage individually. Three bulls (½ Nelore x ½ Angus) with ruminal cannulas and average weight of 350 kg were used. The samples of each diet and of pineapple by-products silage were mixed […]

The work was carried out to evaluate the partial replacement of soybean meal by urea and forage cactus on the performance of lactating dairy Holstein. Eight cows with 90 days in milk and 600 kg of initial average LW, were assigned in a two 4 X4 latin square design. The urea represented 0.0, 0.8, 1.54 and 2.40% of dry matter (DM) of the diets, correspondent to 2.32, 4.65, 6.66 and 8.02% of crude protein (CP) levels in the form of […]

The objective of this work was evaluate the effect of gradative substitution of corn silage (0, 20, 40 and 60%, of dry matter) by pineapple by-products silage on average daily gain, feed intake and feed conversion, carcass yield, fat thickness and loin eye area of bulls, finished in feedlot. Twenty eight bulls were used with approximately 20 months and initial body weight of 328 kg. The animals were divided in a completely randomized design, with four treatments (levels of pineapple […]

Thirty-one Hampshire Down, Ile de France and Suffolk crossbred lambs divided into four treatments: intact, castrated with burdizzo, with rubber bands and with knife, were used in this experiment. Castration occurred at 58 days of age. After weaning, at 84 days, the animals were fed lot until 30 to 32 kg of live weight, and then slaughtered. There were no significant differences among treatments and genetic groups for birth, weaning and slaughter weights, for average daily gain from birth to […]

The intake and apparent digestibility of silage nutrients of different sorghum hybrids: AG2006, AGX215, AGX213, AGX202 e AG2002, were evaluated. Twenty crossbred castrated sheep, averaging 50.7 kg, were assigned to a randomized blocks design, with four animals per treatment. There was no significant difference among silages for the different nutrients intake. Dry matter and total digestible nutrients intakes, in g/day, showed values that ranged from 936.2 (AGX202) to 1156.4 (AG2006) and from 460.9 (AGX215) to 613.4 (AGX213), respectively. The coefficients […]

In order to evaluate different levels of sugar cane bagasse and urea as replacement of soybean meal in growing dairy cattle diets, two trials were conducted. In the first, twenty crossbreed bull calves (Holstein x Zebu) were allotted in a completely randomized design with four treatments. The animals were fed forage cactus based diets, containing levels of 5.5, 14.4, 24.4 and 34% of sugar cane bagasse on the dry matter basis. The liveweight gain decreased while the feed: gain ratio, […]

The objective of this study was evaluate the intake, milk production and composition, nutrients digestibility and feed efficiency of crossbred cows of low potential of production fed diets based on sugar cane. It was used eight cows crossbred Holstein/Gir, with medium live weight of 425 kg, after the initial third of lactation. They were distributed in two Latin squares (4×4), in agreement with the lactation order, feeding with complete diets to the sugarcane base, being, cane more urea (CAU); cane, […]