The aim of this study was to determine the dietary protein requirement and associated energy to protein (E/P) ratio for “Piracanjuba”, Brycon orbignyanus, fingerlings. Casein-gelatin semipurified diets were formulated to contain six crude protein (CP) concentrations: 24, 26, 29, 32, 36 e 42% at one energy level, 3,000 kcal metabolizable energy (ME)/kg. These diets resulted in E/P ratios of 12.3, 11.6, 10.4, 9.2, 8.5 and 7.1 kcal ME/g CP, respectively. The protein, lipid and digestible carbohydrate sources were casein/gelatin, cod […]

The research was carried out at the Centro de Assessoria e Apoio aos Trabalhadores e Instituições Não-Governamentais, Alternativas (CAATINGA) in the Ouricuri county, state of Pernambuco, Brazil, in the period of 1989-1994, with the objective of comparing different practices of woody vegetation manipulation, as alternatives of sustainable pastoral management of caatinga and determining their viability to the small producers. Plots measuring 25 x 100 m had the woody vegetation submitted to the following experimental treatments: deforestation, thinning, thinning-lowering, lowering and […]

The nutritive value of five sorghum hybrids (AG-2002, AG-2005E, AG-X202, AG-X213 and AG-X215) silages, cultivated under increasing fertilization levels (control, 0.5, 1.0, and 2.0 times of the recommended fertilization, corresponding to 0, 45.5, 91, and 182 kg/ha N; 0, 49, 98, and 196 kg/ha de P2O5; and 0, 14, 28, and 56 kg/ha de K2O, besides of 0, 42, 84, and 168 kg/ha S, respectively, that came from the used ammonia sulfate). A complete randomized block design in a factorial 5×4 arrangement (five hybrids […]

This work aimed to characterize an elephantgrass collection (Pennisetum purpureum Schum.) comprising 71 clones and selecting the best ones to be tested later under grazing conditions. It was carried out at Cedro Experimental Station – IPA, located in Vitória de Santo Antão, forest zone of Pernambuco State. The period of evaluation included both the raining and the dry season. Each clone was represented by a non-replicated plot of 10 m2. According to linear correlation analysis, the more productive clones also […]

The objective of this experiment was to evaluate the nitrogen fertilization efficiency using urea, on triticale plus Italian ryegrass pasture, submitted to continuous stocking. Four nitrogen levels were used: 0, 150, 300 and 450 kg of N/ha, divided in five applications. The herbage mass was 1404, 1437, 1619 and 1599 kg of DM/ha. The total herbage production was 6039, 6914, 7877 and 7662 kg of DM/ha and the nitrogen production was 191.6, 247.7, 303.2 and 307.2 kg of N/ha for […]

The experiment was performed in a green house at the Animal Science Department of the Pernambuco Federal Rural University (UFRPE) and aimed to study the nematicide and fertilization effects on the forage cactus cv. “Gigante” growth and production using propagative materials with clorotic symptom. The experimental treatments tested the addition or no of macronutrients, micronutrients and nematicide. It was used a complete randomized block design. Considering the primary cladode’s number, no differences were found by F test. Significative differences were […]

The aims of this research were to estimate the influence of age of dam at calving (AC), and julian date of birth (JDB) on weaning weight (WW) and preweaning average daily gain (ADG) of gyr calves and adjustment factors for them. It was analyzed 10,685 and 18,339 records, on WW and ADG of Gyr calves, from the Associação Brasileira dos Criadores de Zebu data set belonging to 1229 and 1979 contemporary groups (CG), respectively. AC, for males, was fitted as […]

An experiment was carried out to evaluate the effects of metabolizable lysine (LM) and metabolizable energy (EM) on uni and multivariable of performance and carcasses of broilers, maintaining the ideal protein balance. Were used 2808 male chicks from a commercial line from 1 to 21 days and allotted to 104 pens. The treatments resulted from a factorial arrangement of three ME levels (3,000, 3,100 and 3,200 kcal/kg) and four LM levels (0.92, 1.02, 1.12 and 1.22%) plus another treatment on […]

This study was run to evaluate the physiological response and expression of hepatic and brain Hsp70, of 20 Naked neck (Na/na) and Hubbard-Petersen broiler chicks (2 to 5 days of age), exposed or not to 36-37°C. The trial was conducted during four days and the birds were exposed to high temperature during 5 hours. Liver and brain tissue samples were collected at the end of the stress period and analyzed for Western Blotting for determination of Hsp70 level. No association […]

Fifty crossbreed gilts (Landrace, Large White and Pietrain) with 136.34±16.05 and 220 days of average weight and age, respectively, were used to evaluate diets with different crude protein levels, at the gestation period. A complete randomized blocks design, with five treatments, ten replicates and one animal per experimental unit, was used. The treatments corresponded to the diets with 10.0, 11.5, 13.0, 14.5 and 16.0% of crude protein. The weight gains of the gilts at the 90 days of the gestation […]