The objective of this experiment was to determine the true digestibility of lysine HCl and lysine sulfate, with cecectomized adult roosters. Eighteen roosters, 2.854 kg live weight, were cecectomized and kept in cages for a period of 10 days. After two days of adaptation to the cages the animals were fed twice a day during one hour (8:00 a.m. to 9:00 am and 4:00 p.m. to 5:00 pm), for crop dilation to avoid regurgitation of the feed. The forced fed […]

This experiment was conducted to evaluate levels of crude protein (CP) for growing gilts, under high temperature environment. The internal temperature at room was maintained at 30.7 ± 0.61°C, with relative humidity of 66.4 ± 7.7%, and the calculated black globe humidity index (BGHI) in period was of 81.1 ± 1.36. Forty crossbred gilts, with average initial weight of 29.7 ± 1.60 kg, were allotted to an experimental design of randomized blocks with five treatments (16, 17, 18, 19 and […]

One hundred and eighteen Holstein cows were used to evaluate the effects of body condition score at parturition on milk production and fat content, blood beta-hydroxybutirate (BHBA), glucose and aspartate-aminotransferase (AST) and disease occurence in early lactation. According to their body condition score (BCS) at calving, 1 (thin) at 5 (fat), the cows were alloted in two groups: I) composed by BCS ³ 4,0; and II) composed by BCS £ 3,5. The BCS were 4.2 and 3.2 for the group […]

The effects of the addition of bakery waste (BW) replacing corn in the diet of Holstein steers was studied on carcass dressing and meat quality. Four treatments were applied, respectively, 0%, 10%, 20% and 30% of bakery waste replacing corn in the concentrated mixture. The animals were fed with complete pelleted mixtures, with 30% of Coast-cross hay (Cynodon dactylon L.) as roughage. A randomized block design with four treatments and five repetitions, total of 20 animals, was used. The experiment […]

The objective was to evaluate the effect of energetic supplementation on feed intake and ruminal fermentation of proteins in two protein levels in the diet (6 and 20%). There were used four rumen fistulated crossbred steers in a Latim square and the treatments were arranjed in a 2 ´ 2 factorial, in which the combinations were: A. only hay; B. hay + 2.8 kg of soybean meal; C. hay + 2.8 kg of corn meal; and D. hay + 2.8 kg of soybean meal + […]

The coffee hull and pulp dehydrated carbohydrate fractions A, B1, B2 and C, were evaluated according to the CNCPS. Three coffee cultivars were evaluated: Catuaí, Rubi and Mundo Novo. Pulp was obtained by moist pulping in a mechanical pulper and dried in the sun adjusted to 13% moisture. Materials were stored in raffia bags in environment free of moisture and well ventilated. Samplings were taken every 90 days. The equations utilized for determining fractions were reported in the CNCPS model. […]

The ANKOM filter bag system was compared with the conventional filtration system (Van Soest) to determine acid detergent fiber (ADF) and neutral detergent fiber (NDF) in different materials. In the first experiment five feeds (sugar cane, Marandu grass – Brachiaria brizantha cv. Marandu, corn silage, citrus pulp and cattle feces) and four types of filter bags were compared. A completely randomized block design in a factorial scheme (5×4), with three replications, was used. The means obtained by the ANKOM system […]

The in vitro/gas dry matter (DM) digestibility of four roughages, mixed or not, in proportion of 50% in the DM were evaluated. Samples of 100 mg by treatment, in triplicate, in 48 h of digestion were incubated. The DM digestibilities and gas production were: sugar cane = 60.6%, 17.3 mL; sugar cane + corn silage = 63.9%, 19.6 mL; sugar cane + elephantgrass of 60 days = 60.5%, 16.9 mL; sugar cane + elephantgrass of 180 days = 48.6%, 14.1 […]

The objective of this study was to evaluate the effects of different levels of degradable intake protein (DIP) diets during the feedlot-growing phase, on performance, in vivo growth parameters measured by ultrasound and on carcass traits and meat quality of young bulls. Sixty Brangus calves, 8 months old, averaging 243,2 kg, were submitted to three treatments in growing (Phase 1) and finishing (Phase 2) phases: T1 – 69% DIP in Phases 1 and 2; T2 – 77% DIP in Phase […]

This experiment aimed to evaluate the dry matter intake (DMI) under grazing, obtained through the chromium, in continuous infusion of chromic oxide, dosed once (CR1x) or twice (CR2x) daily, and in mordant form (CRMord), together with the following internal digestibility markers: in vitro dry matter digestibility (IVDMD), indigestible DM (iDM) and indigestible neutral detergent fiber (iNDF) and acid detergent fiber (iADF). Five F1 Limousin x Nelore steers, fistulated in the esophagus and rumen and supplemented in pasture of Brachiaria decumbens, […]