The free-choice feed and regulation of protein intake were investigated in juveniles reverted males of tilápia do Nilo, Oreochromis niloticus. During the experiment 1000 fish (reverted males) with similar weigth and length were maintained in eight aquariuns supplied with recirculated water (groups of 125 fish each aquarium). Fish were fed by demand-feeders, containing the two experimental diets, formulated to contain 15% and 40% protein each and distributed in four treatments (A: 15% protein diet on one hand and 40% protein […]

This work was carried out to identify the replacement of the nauplii Artemia sp. for the enriched and frozen rotifer (Brachionus plicatilis O.F. Müller, 1786) on the larval development and survival of the freshwater prawn M. rosenbergii. The experiment was developed according to the following treatments: 100% B. plicatilis (30 rots/ mL) (T1); 100% Artemia sp. (5 nas/ mL) (T2), 60% Artemia sp. (3 nas/ mL) + 40% B. plicatilis (12 rots/ mL) (T3) e 40% Artemia sp. (2 nas/ […]

The feeding is one of the most important factors to larval development and the sucess of the commercial cultivation of decapod crustacean larvae depends on the efficient and economic utilization of the available food. The performance of Macrobrachium rosenbergii larva submitted to four different feeding systems was tested by using the daily observation of the larval substages and the first metamorphoses. The larvae were stocked in a density of approximately 100 larvas.l-1, in 16 tanks, with 33 liters capacity. The […]

Two experiments were conduct to evaluate the effect of dietary nutritive value and performance of sheep fed corn- or sunflower silage-based diet with increasing concentrate proportion (20, 40 and 60%). A factorial design (2×3) was used to evaluate nutritive value and digestibility coefficient of two silages with three concentrate levels and three sheep for each treatment. For lamb performance, a randomized block design in a factorial arrangement (2×3) was used to evaluate lamb performance, with five Suffolk lambs/treatment. Apparent digestibility […]

This experiment was conducted out to evaluate the forage mass (FM), green leaf lamina mass (GLLM), green stem + leaf sheath mass (GSSM), mass of dead material (MDM), green forage mass (GMF), total forage mass (TFM), leaf/stem ratio (L/S), dry matter accumulation rate (DMAR), leaf area index (LAI), % of bare soil (BS) and litter cover percentage (LCP) in Tanzaniagrass pasture (Panicum maximum Jacq. cv. Tanzania-1) managed at four different sward heights (20, 40, 60 and 80 cm). The grazing […]

Crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and in vitro dry matter digestibility (IVDMD) contents were assessed in the leaf blade and stem + leaf sheath fractions of Tanzaniagrass (Panicum maximum Jacq. cv. Tanzania-1) managed at four sward heights (20, 40, 50 and 65 cm). The grazing method was the continuous stocking and variable stocking rate, and used Nelore steers with an average weight of 340 kg. The […]

Gliricidia sepium has been used as shade tree in cocoa plantations, living fences, wood, fuel wood and livestock forage. It can be grown from seeds and from cuttings or stakes. This experiment was carried out to evaluate five grown methods from Gliricidia cuttings in other to identify the one showing highest stake sprouting indexes, forage production and least implantation costs. The experiment was in a randomized block design with five treatments and five replications. The treatments were the followings: 1) […]

The agronomic characteristics, neutral detergent fiber (NDF), acid detergent fiber (ADF) and total soluble and structural carbohydrates contents of five hybrid sorghum (AG-2002, AG-2005E, AGX-212, AGX-213 e AGX-215), cultivated under different fertilization levels, were evaluated. A randomized blocks design, in a 5 x 4 factorial scheme, with four replicates, was used. The qualitative factors means were analyzed by means of Tukey test at 5 and 1% of probability. The evaluated hybrids showed different proportions of stem (29.01 to 53.38%), leaves […]

This research was conducted with the objective of determining growth of Brachiaria brizantha (A. Rich.) Stapf. cv. Marandu under nitrogen (N) rates (28, 112, 210, 294 and 378 mg/L, where N-NO3– : N-NH4+ of 70%:30% proportion was kept constant) and growth ages (21, 28, 35, 42, 49 and 56 days after seedling emergence). The experiment was carried out in greenhouse conditions, with nutrient solution and using ground quartz as substrate. The experimental design used was a complete randomized block design, […]

This experiment was carried out in a greenhouse at the Animal Science Department/UFRPE and aimed to evaluate the fertilization and nematicide effects on the chemical composition of cactus forage cv. “Gigante” suffering chlorotic symptoms. Chlorotic cladodes of Cactus forage cv. “Gigante” were used as planting material and they were collected at the Caruaru Experimental Station/IPA in the same location where those symptoms were previously observed. The treatments tested the presence or absence of macronutrients, micronutrients, and nematicide. A completely randomized […]