The effects of feeding meal of tilapia filleting industrial waste (FW) on performance and body composition for Nile tilapia fry were evaluated. One hundred and twenty Nile tilapia fries (averaging initial weight and length of 0.58±0.05 g and 3.49±0.09 cm, respectively) were assigned to 24 30L-aquariums. The experiment was analyzed a complete randomized design with four treatments and six replications. Diets contained 30% of digestible protein and 3,000 kcal/kg of digestible energy. The following treatments were used: CO – corn […]

This trial was carried out to evaluate the effects of ideal protein concept on reduction of dietary protein content for Nile tilapia (5 to 125 g). A hundred and sixty juvenile fishes (4.40 ± 0.9 g) were assigned to a randomized experimental design with four treatments [25.5, 27, 28.5 and 30% (control) of digestible protein], three replicates and ten fish by experimental unit. Crystalline amino acids were added to maintain amino acid levels according to the ideal protein concept. The […]

The effects of feeding management strategies on larval rearing of trairao were evaluated in this trial. Eight-d old larvae were counted and stocked in 20 experimental containers (units with volume of 5 L each), with constant aeration and temperature. The stocking density was 30 larvae/L. The following treatments (feeding frequency) were used: F1 – once a day, F2 – twice a day, F3 – three times a day, F4 – four times a day, each with five replicates. Feeding rate […]

Leaf assimilates are exported to plant organs (sinks) in variable pattern according to several factors such as: plant developmental stage, leaf insertion level, intensity of defoliation. The distribution of single leaf assimilates to different fractions of Mombaçagrass plant was assessed as a function of several factors. The factors considered were: 1 Leaf insertion level (top and bottom leaves); 2 Tiller hierarchy (main and primary tillers), and 3 Plant defoliation (control and defoliated plants). Defoliated plants had their blades removed at […]

It was assessed the nutritive value of hand plucked forage samples collected along the grazing period and the animal performance on Mombaçagrass pasture under intermittent stocking with three rest periods (RP). The RPs were defined by the time required for the expansion of 2.5, 3.5, and 4.5 new leaves per tiller, after six days grazing period. The experimental area was divided into five paddocks for the 2.5 new leaves RP and six paddocks for the 3.5 and 4.5 new leaves […]

This trial was carried out to determine the composition of n-alkanes (C24 to C36) in hypothetical diets comprising of pure Brachiaria brizantha Stapf. cv. Marandu and Arachis pintoi Koprov & Gregory. cv. Amarillo and mixtures of these two spececies with 15%, 30%, 45%, or 60% of Arachis pintoi); it also intended to identify the combination of alkanes that allows to calculate the botanical composition of diets with the smallest residual value (real less estimated values). The forages were sampled in […]

The morphogenetic and structural traits of Brachiaria brizantha cv. Xaraés submitted to the treatment combinations of four nitrogen rates (0, 40, 80 and 120 mg/dm3) and three defoliation frequencies (two, four and five completely expanded leaves) were evaluated according to a 4 x 3 factorial arrangement. The experiments were conducted in a greenhouse, with the treatments arranged as factorial combination. The experimental design was completely randomized, with four replications. After thinning, three seedlings were left per pot (5,8 dm3). The […]

The effect of two herbage masses (HM) (1,200 or 1,500 kg/ha of dry matter – DM) and use of energy supplementation on performance of beef heifers grazing oat (Avena strigosa Schreb) plus annual ryegrass (Lolium multiflorum Lam) was evaluated. The heifers were assigned to the following treatments: LHMNS – low herbage mass, no supplementation; HHMNS – high herbage mass, no supplementation; LHMS – low herbage mass + supplementation;HHMS – high herbage mass + supplementation. The supplement utilized was ground sorghum […]

Some morphogenic and structural characteristics of four forage grasses grown under four soil moisture conditions were assessed. The forage species were: Setaria anceps Stapf., Hemarthria altissima [Poir] Stapf. & Hubbard, Acroceras macrum Stapf. and Brachiaria purpurascens [Raddi] Henr. Soil moisture level was controlled by weighing individual pots and by relative saturation of total porosity (RSTP). A randomized block design with three replications was used. Four plants of each specie were submitted to four soil moisture levels: deficit (50% RSTP)(D), control […]

This trial was carried out from June 1999 to March 2000 to evaluate the chemical composition of samples of sabiá legume (Mimosa caesalpiniaefolia Benth.), with and without thorns, collected in the rainy and dry seasons and to compare the botanical composition of sabiá pasture with that of the diet selected by the grazing animals. No significant difference was observed in chemical composition between samples of sabiá with and without thorns. The mean values obtained in the rainy samples were: 26.45% […]