The experiment was conduced to determine the protein and energy levels, for laying Japanese quails (Coturnix coturnix japonica), in four experimental periods of 28 days each. Six hundred females quails with 45 days of aged and average initial weight of 138.0g were used. The experimental design used was randomized blocks, in 3×5 factorial scheme, with three levels of energy (2,850, 2,950 and 3,050 kcal of ME/kg) and five protein levels (16, 18, 20, 22 and 24% CP), with four replications […]

Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25, 37.5, 50, 62.5, and 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The intake of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and total digestible nutrients (TDN) were determined. After the slaughter, all animal body parts were weighed, sampled and DM, total nitrogen and ether extract concentrations were […]

Forty Nellore bulls, with average initial live weight (LW) of 240 kg, were used. Four reference bulls and four bulls fed for maintenance were used, and the remaining was assigned to eight treatments, with four different concentrate levels in the diets (20, 40, 60 and 80%) and two (15 and 18%) levels of crude protein (CP). The protein, fat and energy contents retained in the body were estimated by regression equations of the logarithm of protein, fat or energy body […]

Fifteen growing buffaloes of the Mediterranean breed were fed in feedlot for aproximately 140 days with the objective to evaluate three different levels of energy ingested on carcass characteristics. The animals were slaughtered when they reached body weight above 450 kg. The average body weight was 465 kg +/- 16.29 kg. The average metabolizable energy intake estimated for the three treatments were: 18.23, 19.54 and 21.74 Mcal/animal/day. There were no significant differences among treatments in the hot and cold dressing […]

Twenty-seven growing buffaloes of Mediterranean breed were maintained in feedlot for about 140 days with the objective to evaluate the effects of energy intake on the performance and blood serum concentrations of glucose, total protein and urea. The treatments were constituted of three different levels of energy intake: LE (Low Energy), RE (Required Energy) and HE (High Energy). RE was calculated with 125 kcal/kg0.75/day of metabolizable energy for maintenance; LE with 20% below and HE with 20% above of this […]

An experiment was conducted to evaluate the effect of energy levels (2900-LE and 3200-HE- kcal ME/kg), physical form of the diet (mash-M and pellet with 2 mm-P2 and 4 mm-P4) and pair feeding (Pf), by feed restriction based in Ad libitum (Ad)/M/HE diets, on male broilers performance and carcass yield, from 21 to 42 days of age. There were 8 treatments, 5 replicates, 12 birds/replicate. In the P diets, only whole pellets were offered. At these conditions, there were no […]

This work was carried out to compile data of two experiments (I and II) of energy and protein requirements, to enlarge the available information on nutritional requirements of bovine in national level. In the experiment I, 30 Nellore bulls were used and in the experiment II, 29 F1 Simental x Nellore bulls were used. In the both experiments, the animals were fed diets with 25, 37.5, 50, 62.5, and 75% of concentrate. The methodologies and the procedures were standardized and […]

This research was conducted to evaluate the energy and the fiber digestibility of diets containing urea, starea and cottonseed meal as nitrogen sources and corn silage as forage. Twenty-four lambs averaging 11 months old and initial 31 kg LW and total feces collection method were used. Dry matter intake was 64.1, 68.8 and 71.4 g /kg PV.75 /day and the energy, NDF and CF digestibilities were 63.0, 67.7 and 64.4%, 39.6, 55.7 and 50.0%, 47.0, 49.3 and 53.4%, for the […]

Thirty-three 39 crossbreed Holstein-Gyr steers were used in a research aiming to evaluate the effects of feed restriction prior to the confinement on the changes in body composition and in the net requirements of energy for maintenance and weight gain, and protein for weight gain. Thirty animals were submitted to a high grazing pressure, while the remaining nine steers had unrestricted access to forage (continuous gain group), after what, six animals from the first group and three from the second […]

The objective of this work was to study the replacement of corn by cassava hulls, swept cassava meal or cassava scrapings on the average weight gain, feed intake, feed:gain ratio and carcass yields of feedlot heifers. Twenty-eight crossbreeding heifers averaging 365 kg LW and 24 months of age were allotted to a randomized blocks design in a 56 days experimental period, with four diets and seven replicates. There was no effect of replacement of corn by cassava products on average […]