The effect of four levels (0; 33; 66 and 100%) of substitution of sorghum grain (Sorghum bicolor L. Moench) by oats grain (Avena strigosa) in the concentrate of diets for feedlot finishing steers, was studied. Steers (19 months old and initial weight of 381 kg) were fed a diet containing 60% roughage and 40% concentrate, formulated for ADG of 1.2 kg/animal. During the adaptation period of seven days and in the first half of the experimental period (35 days) the […]

This work was carried out with the purpose of evaluating the retention and the requirement of Ca e P minerals during the pregnancy of goats with one or two foetus. The estimate of retention was based in the difference between the total of each mineral stored in the foetus, uterus, membranes, fetals fluids and mammary gland of animals in the differents phases of pregnancy and the total of each mineral stored in the empty goats, using the model of prediction […]

This work was carried out with the purpose to evaluate the minerals retention during the pregnancy of goats with one or two foetus. The estimate of retention was based in the difference between the total of each mineral stored in the foetus, uterus, membranes, fetals fluids and mammary gland of animals in the differents stages of pregnancy and the total of each mineral stored in the empty goats, using the model of prediction: ln Y = A – B e […]

This trial aimed to characterize the ingestive behavior of Jersey dairy cows during cool and warm seasons, and at 30, 60 and 90 days post-partum. Daily time spent eating, ruminating and idling was estimated through visual observations recorded by a well trained observer. Records were made intermittently, using 10 minutes interval during 24 hours, five days per period, totalizing 30 days of observations. Ingestive behavior was recorded for each individual animal. Daily eating and rumination times were larger at warm […]

The objective of this research was to evaluate the effects of ingestion rations with different phosphorus levels, by goats in growth, on metabolism and endogenous losses of phosphorus. Eighteen Saanen animals, males, castrated, from 4 to 5 months of age, body weight average of 25 ± 1.2 kg, were housed, for 45 days, in metabolism cages. The animals received rations with three levels of P (0.08, 0.15 and 0.38% in dry matter) and similar levels of crude protein, metabolizable energy […]

This trial was run at Estación Experiment Agropecuária of INTA (EEA-INTA, Rafaela), Argentina. Thirty-two high producing Hostein-Argentina dairy cows were used in early lactation, aiming to evaluate blood parameters at two levels of protected fat (0 and 400 g/cow/day) and two types of alfalfa (fresh or haylage). All cows were submitted to a pre-trial period of fifteen day in two groups: with and without fat supplementation. The animals, post-partum, were allocated to paddocks with green or pre-dried alfalfa, comprising, then, […]

The objective of this work was to study the carcass and meat characteristics of Mediterranean buffalos, finished in feedlot for 112 days and fed with 33% concentrate and 67% chopped sugar cane or corn silage diets, containing 12% of crude protein. Twelve buffalos steers, with 20 months of age, were used. Slaughter weight, hot carcass weight and cold carcass weight were similar between the treatments, being, respectively, 363.7, 181.8 and 179.9 kg, for animals fed with chopped sugar cane, and […]

The experiment aimed to evaluate animal performance and economic return in oats (Avena strigosa Schreb) plus Italian ryegrass (Lolium multiflorum Lam) pasture subjected at three systems of utilization. The treatments used were: 1. pasture of oat + Italian ryegrass + 300 kg/ha of nitrogen-‘Nitrogen’; 2. pasture of oat + Italian ryegrass + supplementation-‘Supplement’ and 3. pasture of oat + Italian ryegrass + arrowleaf clover-‘Clover’. The experimental animals were ninety-four beef heifers of Charolais breed and Charolais-Nellore crosses, with initial weight […]

Two trials were conduced to determinate the requirement of digestible lysine of broilers from 22 to 42 days, feeding diets maintaining or not the relationship of amino acids, kept under heat stress. A completely randomized experimental design was used in both trials. In trial 1, the broilers were allotted in five treatments (lysine levels in conventional diets) and six replicates with seven broilers in each. In trial 2, the broilers were allotted in four treatments (diets with different lysine levels, […]

Two trials were conducted to evaluate the effects of digestible lysine levels in diets maintaining or not the relationship of amino acids, on performance of broilers from 1 to 21 days, kept under heat stress. A completely randomized experimental design was used in both trials. In the trial 1, the broilers were allotted in five treatments (0.92; 0.98; 1.04; 1.10 and 1.16% of lysine in conventional diets), eight replicates and ten broilers per replicate. In the trial 2, the broilers […]