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Search Results: 1 - 10 of 24379 matches for " Paulo Borges;Alvarenga "
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Quebra de dormência de sementes da videira cv. niágara rosada sem estratifica??o
Val, Aurinete Daienn Borges do;Motoike, Sérgio Yoshimitsu;Alvarenga, Eveline Mantovani;Cecon, Paulo Roberto;
Revista Ceres , 2010, DOI: 10.1590/S0034-737X2010000200015
Abstract: the objective of this study was to asses the effect of three factors on the germination of grape seeds, cv. niagara rosada. the three studied factors were: physical treatments, chemical treatments and germination environment. the physical treatments consisted of whole seeds, seeds with a cross cut in the median region and seeds with a cut in the micropyle. the chemical treatments were applied by immersing whole seeds in aqueous solution of gibberellic acid (ga3) with concentrations of 0 and 4000 mg l-1. the environments evaluated were in vitro and ex vitro. the experiment was arranged in a factorial 3 x 2x 2, randomized blocks design, with 4 repetitions, each one consisting of a gerbox? containing 25 seeds or a rack with 25 test tubes. the parameters evaluated were the percentage and speed of seed germination. the results showed that cutting is essential to the germination of non-stratified seeds. the combination micropyle cut, 4000 mg l-1 of ga3 and in vitro environment resulted in 77% of seed germination. the in vitro environment was significantly superior to the ex vitro environment.
ADI O DE FITASE EM RA ES COM DIFERENTES NíVEIS DE ENERGIA METABOLIZáVEL, PROTEíNA BRUTA E FóSFORO DISPONíVEL PARA FRANGOS DE CORTE DE 1 A 21 DIAS
Renata Ribeiro Alvarenga,Adriano Kaneo Nagata,Paulo Borges Rodrigues,Márcio Gilberto Zangeronimo
Ciência Animal Brasileira , 2011,
Abstract: The objective of this study was to evaluate the performance and the pollutant excretion of broilers from 1 to 21 days of age fed diets with different levels of metabolizable energy (MEn), crude protein (CP) and available phosphorus (aP), supplemented with amino acids and phytase. To evaluate the performance, 1,350 Cobb broilers at one day of age (weight of 45.5 ± 0.9g) were distributed in a completely randomized design in a 4x2+1 factorial arrangement (four levels of MEn – 2,850; 2,950; 3,050 and 3,150 kcal/kg – and two of CP and aP – 17 with 0.34% and 19 with 0.25%, respectively, all with phytase, and an additional treatment – control, without phytase, with 21% PB, 3,000 kcal/kg MEn and 0.46% aP), in six replications with 25 birds. To evaluate the excretion of pollutants, 270 broilers at 14 days of age were allotted in metabolic cages in groups of five during seven days, using the same statistical design. Although the use of phytase reduced phosphorus and copper excretion, it decreased weight gain and increased feed conversion ratio in all studied nutritional plans. In phytase-diets, the energetic levels linearly reduced feed intake and improved feed conversion ratio and calcium and potassium excretion. Energy reduced the nitrogen, phosphorus and zinc excretion only in 17% CP and 0.34% aP diets. Crude protein reduction in phytase-diets improved feed conversion ratio and reduced nitrogen and potassium excretion. It was concluded that phytase decreases broiler performance until the third week of age when combined with reduced levels of CP and aP in diets.
Amino acid reduction in broiler diets supplemented with phytase and elaborated according to different nutritional plans
Oliveira, Jeferson Eder Ferreira;Rodrigues, Paulo Borges;Alvarenga, Renata Ribeiro;Zangeronimo, Márcio Gilberto;Lima, Gustavo Freire Resende;
Ciência e Agrotecnologia , 2012, DOI: 10.1590/S1413-70542012000200012
Abstract: the need for suitable diets in chickens, considering the ideal protein concept associated with phytase, is important in order to improve the productivity of birds. the aim of this study was to assess the need for the correction of amino acid levels in the diets of broilers, by using different combinations of crude protein (cp) supplemented with phytase. for performance, eight days old cobb 875 broiler chicks, with initial body weights of 155 ± 1.4g were used. the birds were distributed in a completely randomised design with seven treatments (nutritional plans) and five replicates of 25 birds. for the metabolism trial, 300 birds were selected which were also distributed using the same design, but with five, four and three birds per experimental stage: 8-21 days, 22-35 days and 36- 42 days. the nutritional plans consisted of different combinations of cp in diets with reduced calcium and phosphorus, supplemented with phytase and amino acids. the reduction of amino acids in diets with reduced levels of cp resulted in an increased intake, feed conversion and abdominal fat level, and decreased the yield of thigh + drumstick. the inclusion of phytase reduced the excretion of calcium and phosphorus, but increased nitrogen excretion when the cp was not reduced. as a result, this study concluded that the reduction of amino acids to 3.5%, supplemented with phytase and prepared according to a nutritional plan does not improve the performance and carcass characteristics of broilers, although it may reduce the emission of polluting elements by excreta.
Nitrogen, calcium and phosphorus balance of broilers fed diets with phytase and crystalline amino acids
Gomide, Elisangela Minati;Rodrigues, Paulo Borges;Zangeronimo, Márcio Gilberto;Bertechini, Ant?nio Gilberto;Santos, Luziane Moreira dos;Alvarenga, Renata Ribeiro;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011005000003
Abstract: the objective of this study was to evaluate the effect of reduced-crude protein (cp) and available phosphorus (ap) diets, added with phytase and amino acids for broilers in the growing (14 to 21 days old) and retirement (35 to 42 days) phases on nitrogen, potassium and phosphorus balance. ninety cobb broilers were distributed in a completely randomized design with three treatments and six replications with five and three birds per experimental unit in the growing and retirement phases, respectively. diets were elaborated to contain reduced cp and ap levels (19 and 17% cp in the growing phase, with 0.34% ap; and 18 and 16% cp in the retirement phase, with 0.30% ap), supplemented with crystalline amino acids and 500 ftu of phytase/kg diet. these were compared to a control diet (21% cp and 0.46% ap for growing phase and 19% cp and 0.40% ap for retirement phase). the reduction of cp in four percentual units reduced the n excretion and increased the retention of this element, showing that the phytase had no influence on n balance when used the crystalline amino acids in the diets. the phytase reduced the p excretion and increased the retention ones. the potassium excretion decreased in reduced-cp diets, but this excessive reduction decreased the retention of this element, except in the retirement phase. it was concluded that the reduced-cp and ap diets, supplemented with phytase and amino acids, are efficient in reducing the pollutant power of the broilers excrements in the growing and retirement phases of production.
Carcass characteristics of broilers at 42 days receiving diets with phytase in different energy and crude protein levels
Nagata, Adriano Kaneo;Rodrigues, Paulo Borges;Alvarenga, Renata Ribeiro;Zangeronimo, Márcio Gilberto;Donato, Daniella Carolina Zanardo;Silva, José Humberto Vilar da;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000300020
Abstract: the aim of this study was to evaluate carcass characteristics and quality of breast meat after the inclusion of phytase in broiler diets with different levels of apparent metabolizable energy (amen) corrected for nitrogen and reduced crude protein (cp) supplemented with essential amino acids following the concept of ideal protein. a total of 1,500 cobb broilers from 22 to 42 days (initial weight of 833 ± 7 g and final weight of 2741 ± 48 g) were distributed in completely randomized design in a factorial 3x3+1 experiment (three levels of amen - 2,950; 3,100 and 3,250 kcal/kg - and three levels of cp - 14, 16 and 18% - and an additional treatment - control without phytase, with 3,100 kcal/kg eman, 19.2% pb and 0.4% available phosphorus), in six replications of 25 birds each. at the end of the trial, two birds of each experimental unit were slaughtered in order to measure carcass yield and yields of parts and to determine the chemical composition of the breast meat. the levels of amen and cp of diets with phytase influenced (p<0.05) the carcass, breast and abdominal fat yield and humidity, protein and fat percentage in the pectoralis major muscle of the birds. the levels of 3,100 kcal amen/kg and 18% cp showed higher carcass and breast yield and lower abdominal fat deposition, although with higher fat percentage in the breast meat. it was concluded that the manipulation of the energy levels of diets with reduced crude protein supplemented with amino acids and phytase influenced the yields of parts of carcass and the breast meat quality of the broilers at 42 days.
Efeito do processamento, suplementa??o enzimática e nível nutricional da ra??o para frangos de corte no período de 22 a 42 dias de idade
Pucci, Luiz Eduardo Avelar;Rodrigues, Paulo Borges;Freitas, Rilke Tadeu Fonseca de;Fialho, Elias Tadeu;Nascimento, Germano Augusto Jer?nimo do;Alvarenga, Renata Ribeiro;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000600029
Abstract: in order to evaluate the physical form of diet and the use of enzymes and nutritional levels in diets based on corn and soybean meal, two experiments were carried out using a total of 1344 male broilers from 22 to 42 days of age, distributed in a randomized design in a 2 x 2 x 2 factorial scheme with two physical forms of diet (meal or crushed), with and without enzymatic complex (amylase, cellulase and protease) and two nutritional levels (95 or 100% of the recommendations). in experiment 1, 1200 birds were distributed to the eight treatments with five replicates of 30 chickens each, to evaluate the feed intake (fi), weight gain (wg) and feed conversion (fc) and carcass traits of birds. simultaneously, in the experiment 2 (assay metabolism), 144 birds were distributed in metal cages and received the eight experimental treatments in six replicates of three birds each. at 38 days of age the total excreta collection were started, and the collect for three consecutive days to determine the apparent metabolizable energy corrected (amen) and the metabolizability coefficients of dry matter (mcdm) and crude protein (mccp) of experimental diets. in general, the results can conclude that enzyme supplementation results in no improvement in bird performance and nutrient digestibility of diets, regardless of physical form, which should be made with 100% nutritional recommendations.
Energy and protein levels in diets containing phytase for broilers from 22 to 42 days of age: performance and nutrient excretion
Nagata, Adriano Kaneo;Rodrigues, Paulo Borges;Alvarenga, Renata Ribeiro;Zangeronimo, Márcio Gilberto;Rodrigues, Kênia Ferreira;Lima, Gustavo Freire Resende;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000800014
Abstract: this study was conducted in order to evaluate the influence of different levels of metabolizable energy and crude protein in diets formulated according to the ideal protein concept with phytase supplementation on performance and nutrient excretion of broilers from 22 to 42 days age. it was used 1,500 coob lineage broilers at 22 days of age and with initial weight of 833 ± 7g, distributed in completely randomized design in a 3 × 3 + 1 factorial scheme composed of three levels of correct apparent metabolizable energy (2,950; 3,100 and 3,250 kcal/kg), three levels of crude protein (14, 16 and 18%) and a control treatment, totaling ten treatments with six repetitions of 25 birds each. all diets, with the exception of the control, were supplemented with phytase. for determination of excretion of pollutants, it was used 180 broilers from the same lineage at 35 days of age,placed in metabolic cages, with ten treatments each one with six repetitions and three birds per experimental unit. the protein and energy levels in diets containing phytase influenced feed intake, weight gain, feed conversion and excretion of nitrogen, phosphorus, calcium, potassium, copper and zinc by the birds. the corrected apparent metabolizable energy level in the diets for broilers in the studied period must be increased up to 3,250 kcal/kg of metabolizable energy and the levels of crude protein, calcium and phosphorus must be reduced down to 18, 0.70 and 0.31%, respectively, provided that supplemented with amino acids and phytase to improve the performance and to reduce excretion of pollutants by birds.
Níveis de fósforo disponível e cálcio em ra??es suplementadas com fitase para frangos de corte nas fases de crescimento e final
Santos, Luziane Moreira dos;Rodrigues, Paulo Borges;Alvarenga, Renata Ribeiro;Naves, Luciana de Paula;Hespanhol, Renato;Lima, Gustavo Freire Resende;Lara, Maria Cecília Coelho;Silva, Leonardo Rafael da;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011001100029
Abstract: calcium and available phosphorus (ap) levels in diets with phytase for cobb broilers in the growing (22 to 35 days) and finishing phases (36 to 42 days of age) were evaluated. a 3 × 4 + 1 factorial scheme, with three ap levels (0.36, 0.31, 0.26% in the growing phase and 0.33, 0.28, 0.23% in the finishing phase), four calcium levels (0.82, 0.72, 0.62, 0.52% in the growing phase and 0.76, 0.66, 0.56, 0.46% in the finishing phase), and one level of supplementation of phytase (500 ftu/kg) was used. control diets were not supplemented with phytase and they contained, respectively, the following levels of ap and calcium: 0.41 and 0.82% (growing phase) and 0.38 and 0.76 (finishing phase). in the performance assays, at 35 and 42 days of age, feed intake, weight gain, feed conversion and the ash content in the tibia were evaluated. in the metabolic assays, the energy values of diets (amen) and dry matter digestibility coefficients (dmdc) were determined. in the growing phase, the reduction of the calcium and ap to 0.52 and 0.26%, respectively, did not compromise performance, bone ash, amen or mcdm. in the finishing phase, the reduction of the calcium and ap to 0.56 and 0.28%, respectively, did not compromise performance, amen or mcdm; in addition to improving bone ash. the levels of calcium and ap of diet can be reduced to 0.52 and 0.26% in the growing phase, and to 0.56 and 0.28% in the finishing phase, provided that this reduction is combined with supplementation of fitase at 500 ftu/kg of the diet.
Energy values and chemical composition of spirulina (Spirulina platensis) evaluated with broilers
Alvarenga, Renata Ribeiro;Rodrigues, Paulo Borges;Cantarelli, Vinícius de Souza;Zangeronimo, Márcio Gilberto;Silva Júnior, José Walter da;Silva, Leonardo Rafael da;Santos, Luziane Moreira dos;Pereira, Luciano José;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000500008
Abstract: the objective of this study was to determine the chemical and energy composition of spirulina (spirulina platensis), the nutrient metabolizability coefficients, and the values of apparent metabolizable energy (ame) and the apparent metabolizable energy corrected for nitrogen balance (amen) in broilers. a digestibility trial was carried out by using total excreta collection method, with 90 cobb 500 lineage chicks, with initial weight of 256 ± 5 g at 11 days of age. birds were allotted in metabolic cages for 10 days, distributed in a completely randomized design, with three treatments and six repetitions with five birds each. diets consisted on a reference-ration based on corn and soybean meal and two test diets, one containing spirulina (30%) and the other one with soybean meal (30%). spiruline was superior to soybean meal for contents of dry matter (dm), gross energy (9.60%), crude protein (26.56%), ether extract (54.45%), mineral matter (42.77%), calcium (100%) and total phosphorus (130.77%) and also for most amino acids, except lysine, glutamate, histidine and proline. nevertheless, spiruline presented lower values of gross fiber (83.95%), acid detergent fiber (85.12%) and neutral detergent fiber (6.15). the ame and amen values (kcal/kg of dm) were, respectively, 2,906 and 2,502 for the spirulina and 2,646 and 2,340 for the soybean meal and amen of spirulina was 6.92% higher than soybean meal.
Energetic and nutrient metabolizability values of corn obtained with nutritional corrections for broilers
Makiyama, Letícia;Alvarenga, Renata Ribeiro;Rodrigues, Paulo Borges;Zangeronimo, Márcio Gilberto;Oliveira, Evelyn Cristina de;Bernardino, Ver?nica Maria Pereira;Garcia Júnior, Ant?nio Amandio Pinto;Bertechini, Ant?nio Gilberto;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000500031
Abstract: the experiment was carried out to evaluate the influence of nutritional correction on the partial diet replacement or pure-food methodology to determine the energy values (apparent metabolizable energy - ame and nitrogen-correct apparent metabolizable energy - amen) and coefficient of metabolizability of nutrients of maize. the method of total excreta collection was used, with 120 female cobb 500? broilers weighing 1,339±3 g and at 28 days of age distributed in a completely randomized design with five replicates and four birds per experimental unit. the treatments were pure maize with three levels of nutritional correction (0, 50 and 100%) and a maize-replaced basal diet (400 g/kg) with two levels of correction (0 and 100%). the corrections were made in order to meet the nutritional requirements of calcium, available phosphorus and sodium yonder trace minerals, vitamins, choline, lysine, methionine + cystine, threonine and tryptophan. the ame and amen of maize and coefficient of metabolizability of dry matter were higher when correction at 100% was made, regardless of the methodology used (pure feed or replaced basal diet). the correction at 50% of nutrients increased the coefficient of metabolizability of crude protein in pure maize when compared with 0 or 100% of correction. the values determined with pure maize were lower than those determined with the method of partial replacement. the absence of nutritional correction underestimates the energy values and metabolizability of nutrients from maize.
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