This paper aimed to evaluate the effect of inclusion of cassava leaf protein concentrate (CLPC) in Nile tilapia diets during sex reversal phase. During the experiment, which lasted for 28 days, 300 tilapia larvae at 7 days of age were distributed into 20 aquarium tanks with 30 L of water capacity in a complete randomized design, with 5 levels of cassava leaf protein concentrate (0; 5; 10; 15; and 20%), each one with four replicates. One aquarium with 15 larvae […]

This work was carried out to evaluate levels of L-glutamine and L-glutamate in diets for Nile tilapia juveniles (0.60 ± 0.1 g). A complete randomized experimental design with four diets and three replicates and 90 fish per experimental unit was used. It was used a control diet with 29% of digestible protein and 2,940 kcal/kg of digestible energy supplemented with L-glutamine and L-glutamate at the proportion of 0, 1, 2 and 3% of diet, during 85 days. It was not […]

It was determined, in this work, the nutritional value of four energetic feeds (corn meal, sorghum, whole rice bran, and ground rice) for surubim juveniles. Apparent digestibility coefficients of dry matter (DM), crude protein (CP), and gross energy (GE) were evaluated by food replacement methodology in a reference-feeding using 0.1% of chromic oxide as an external marker. It was used 240 fingerlings with an average weight of 30 g distributed in tanks fitted for faeces collection. A complete random design […]

The objective of the present work was to evaluate the effect of the alkaline treatment of sugarcane with virgin lime or hydrated lime on the bromatologic composition and in vitro digestibility of dry matter, neutral detergent fiber, and acid detergent fiber. It was used a complete random design with a 3 × 3 factorial scheme composed by three forms of of sugarcane processing (in natura sugarcane; hydrolyzed sugarcane with 0.5% virgin lime; and hydrolyzed sugarcane with 0.5% hydrated lime) and […]

This work aimed to evaluate the effect of four levels of nitrogen (100, 300, 500 and 700 kg.ha-1.year) and six water depth (0, 20, 40, 80, 100 and 120% of the reference evapotranspiration) on the forrage yield, tillers density, relationship leaf/stem, plants height and crude protein content and neutral detergent fiber of the elephant grass (Pennisetum purpureum, Schum), during the dry period. The experimental design was a random block split plot design with four replications. Broadcast urea was used as […]

It was evaluated in this work the contents of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), total digestible nutrients (TDN), calcium (Ca), phosphorus (P) and magnesium (Mg) in the aerial section of the Tanzania grass (Panicum maximum), fertilized with nitrogen and phosphorus during the summer and autumn. The experimental design was complete randomized, with a 4 × 3 factorial scheme, and four N rates (0, 100, 200, and 300 kg/ha/year), and three pentoxide diphosphorus (P2O5) rates (0, […]

This trial was conducted with the objective of evaluating the nutritive value of three tropical forage species: tanzania grass (Panicum maximum Jacq.), marandu grass (Brachiaria brizantha) and Tifton 85 bermudagrass (Cynodon spp) in two different periods of the year (January-March and April-June) and in three cutting ages (28, 35 and 42 days), based on the chemical composition, protein and carbohydrate fractions, and in vitro digestibility of dry matter (DMD) and organic matter (OMD). Marandu grass, in the period January-March, had […]

The objective of the present study was to compare the effect of different dosages of equine chorionic gonadotrophin (eCG) on the follicular dynamics and hormonal concentrations in Alpine goats. During the breeding season, the goats were submitted to estrous and ovulation synchronization with a device containing progesterone for 14 days. Female goats (n=24) were divided at random into four groups of 6 animals each. On the day of dispositive removal, the animals received 0 (Control), 200, 300 and 400 UI […]

An experiment was carried out to verify the effect of levels of phosphorus and the particle size of dicalcium phosphate on diets for brown egg layer hens during production phase. A complete randomized experimental design as a 2 × 3 factorial arrangement, with two sizes of particles of phosphate (fine and granulate) and three levels of available phosphorus (0.28, 0.38 and 0.48%), totalizing six treatements with five replications of eight birds each, was used. The experimental diets were isoproteic, isocaloric, […]

The objective of this work was to determine digestible sulfurous amino acids levels to establish the ideal methionine+cystine:lysine relationships in meals of light-weight laying hens in the period from 24 to 40 weeks of age. It was used 216 Hy-Line W36 birds distributed in a randomized block design with 6 levels each one with 6 repetitions and 6 birds per experimental unit. The digestible sulfurous amino acids levels were obtained from a basal diet with low levels of digestible metionin+cistine […]