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| Registros recuperados: 75 | |
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| Toledo,GSP; López,J; Costa,PTC. |
| Two experiments were conducted to evaluate the effect of diets formulated using the criteria of crude protein (CP) and ideal protein (IP) on the yield and carcass composition of male and female broilers. Birds of two broilers strains (Hybro G and Hybro PG) were reared from 1 to 42 days of age during the summer, with average temperatures of 26°C. A completely randomized experimental design was used in a 2 x 2 factorial arrangement, with 6 replicates and 20 birds per pen. On day 42, four birds from each experimental unit were killed and carcass yield and composition were determined. Breast yield was higher in males and females fed the IP-based diet than in birds fed the CP-based diet. Abdominal fat pad and carcass crude protein were statistically similar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broilers; Carcass composition; Crude protein; Carcass yield; Ideal protein. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400005 |
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| Praes,MFFM; Junqueira,OM; Pereira,AA; Filardi,RS; Duarte,KF; Sgavioli,S; Alva,JCR; Domingues,CHF. |
| This study aimed at evaluating diets containing different fiber sources and two crude protein levels on the performance, egg quality, and nitrogen metabolism of commercial layers. In total, 392 48-wk-old Isa Brown layers were distributed according to a completely randomized experimental design in a 3x2+1 (control) factorial arrangement, resulting in seven treatments with seven replicates of eight birds each. Treatments consisted of three fiber feedstuffs (cottonseed hulls, soybean hulls, and rice hulls) and two dietary crude protein levels (12% and 16%). Cottonseed hulls associated with the high crude protein level (16%) resulted in the worst feed conversion ratio per dozen eggs. Diets with 16% crude protein resulted in the highest feed intake, egg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rice hulls; Cottonseed hulls; Soybean hulls; Crude protein; Egg production. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200006 |
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| Faria Filho,DE; Rosa,PS; Torres,KAA; Macari,M; Furlan,RL. |
| A study was carried out to elaborate response surface models using broiler performance data recovered from literature in order to predict performance and elaborate economic analyses. Nineteen studies published between 1995 and 2005 were retrieved using the systematic literature review method. Weight gain and feed conversion data were collected from eight studies that fulfilled the pre-established inclusion criteria, and a response surface model was adjusted using crude protein, environmental temperature, and age as independent variables. The models produced for weight gain (r² = 0.93) and feed conversion (r² = 0.85) were accurate, precise, and not biased. Protein levels, environmental temperature and age showed linear and quadratic effects on weight gain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Environmental temperature; Regression analysis; Response surface; Slaughter age; Systematic literature review. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200009 |
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| Soares,R da TRN; Fonseca,JB; Santos,AS de O dos; Mercandante,MB. |
| Two completely randomized trials were conducted to estimate protein requirements of Japanese quails during the rearing and laying periods. In each trial, 150 quails were distributed in five treatments with five repetitions. Crude protein levels in the rearing period were 18, 20, 22, 24 and 26% (Trial 1) and during the laying period were 16, 18, 20, 22 and 24% (Trial 2). A quadratic effect of protein level was observed on weight gain from seven to 35 days (Trial 1). There were no effects of protein levels on feed intake and feed conversion. Protein levels in experimental diets during rearing had no effect on egg production up to 63 days. However, laying was delayed and variation in body weight was greater in quails fed lower protein levels. In Trial 2, a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Egg production; Japanese quails. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000200010 |
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| Praes,MFFM; Pereira,AA; Sgavioli,S; Duarte,KF; Alva,JCR; Domingues,CH de F; Puzzoti,MM; Junqueira,OM. |
| The objective of the presente study was to evaluate the effects on different dietary fiber sources and crude protein levels on the intestinal morphometry of commercial layers. Isa Brown® layers with 48 weeks of age were distributed in a completely randomized experimental design with a 3 x 2 + 1 factorial arrangement, resulting in seven treatments with seven replicates of eight birds each. At the end of the fourth experimental period (28 days each), birds were 64 weeks of age and were randomly chosen (two birds per replicate, totaling 14 birds per treatment), weighed and sacrificed by neck dislocation. Their intestine was dissected and the duodenum, jejunum and ileum were collected for subsequent analysis of intestinal morphometry. Treatments consisted of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Fibers; Intestinal development. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000300004 |
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| Liu,SK; Niu,ZY; Min,YN; Wang,ZP; Zhang,J; He,ZF; Li,HL; Sun,TT; Liu,FZ. |
| This study was undertaken to assess dietary crude protein (CP) concentration for optimum growth performance and carcass characteristics of Lueyang black-boned chicken. In total, six hundred 42-day-old Lueyang black-boned chicks were randomly assigned to five treatments, each with six replicate pens with ten males and ten females. The birds fed experimental diets with different levels of protein concentration of 120, 140, 160, 180 and 200 g kg-1 from seven to twelve weeks of age respectively. On day of 84, weight gain, feed intake, and feed:gain ratio were measured, and two chickens (one male and one female) close to the average weight of all birds in each treatment were selected from each pen and sacrificed to evaluate carcass traits and selected serum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Growth performance; Indigenous fowl; Lueyang black-boned chicken. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100103 |
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| Furlan,RL; Faria Filho,DE de; Rosa,PS; Macari,M. |
| Nutrition for broilers under high temperatures is extremely important for brazilian broiler chicken industry because the amounts of consumed nutrients and environmental temperature have great effects on bird performance and carcass quality. Among diet nutrients, protein has the highest heat increment; thus, during many years, diets with low protein level were recommended in order to reduce heat production in broiler chickens under heat stress. However, reports have shown that low-protein diets have negative effects on broiler performance when environmental temperature is high, because during heat stress, low food intake associated to a low diet protein induce amino acid deficiencies. Other studies have shown that broilers fed low-protein diets increase... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chickens; Crude protein; Heat stress; Heat increment; Heat production. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000200001 |
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| Duarte,KF; Junqueira,OM; Borges,LL; Rodrigues,E; Filardi,R da S; Praes,MFFM; Laurentiz,AC de; Domingues,CH de F. |
| This study was carried out to evaluate the effect of the inclusion of different linseed oil levels (0.0, 3.3, 6.6, or 9.9%) in iso-energy diets fed during the period of 21 to 56 days of age on the performance, carcass traits, and body composition of broilers. A total of 1,600 broilers were distributed according to a completely randomized experimental design consisting of four treatments with eight replicates of 40 birds per experimental unit. In the period of 21-42 days of age, weight gain increased, feed and calorie conversion ratios quadratically improved, and feed and metabolizable energy intakes linearly increased as dietary linseed oil level increased. Considering the entire experimental period, dietary linseed oil linearly increased weight gain and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ether extract; Weight gain; Abdominal fat; Crude protein; Carcass yield. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100008 |
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| Sousa Neto,Eurico Lucas de; Pierangeli,Maria Aparecida Pereira; Lal,Rattan. |
| Compaction is an important problem in soils under pastoral land use, and can make livestock systems unsustainable. The objective of this research was to study the impact of soil compaction on yield and quality of palisade (UROCHLOA BRIZANTHA cv. Marandu). The experiment was conducted on an Oxisol in the State of Mato Grosso, Brazil. Treatments consisted of four levels of soil compaction: no compaction (NC), slight compaction (SC), medium compaction (MC) and high compaction (HC). The following soil properties were evaluated (layers 0-0.05 and 0.05-0.10 m): aggregate size distribution, bulk density (BD), macroporosity, microporosity, total porosity (TP), relative compaction (RC), and the characteristics of crude protein (CP), neutral detergent fiber (NDF),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Relative compaction; Urochloa. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400010 |
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| Oliveira,Cleber Franklin Santos de; Costa,Fernando Guilherme Perazzo; Silva,José Humberto Vilar da; Goulart,Cláudia de Castro; Saraiva,Edilson Paes; Givisiez,Patrícia Emília Naves; Lobato,Gledysonn Bruno Vieira; Bezerra,Roseane Madeira. |
| The objective was to evaluate the effect of electrolyte balance in diets with reduced protein for semi-weighted Bovans Goldline laying hens in the second production cycle. The design was completely randomized with five treatments and seven replicates of six birds per experimental unit. Treatment 1 consisted of a control diet containing 165.0 g/kg crude protein (CP), formulated with the addition of DL-methionine to meet birds requirements during the experimental period. To compose the treatments 2-5 (BE149, BE167, BE185 and BE203), a basal diet with reduced protein (135.0 g/kg CP) supplemented with synthetic amino acids DL-methionine, L-lysine, L- threonine, L-valine and L-tryptophan was formulated. This basal diet was supplemented with potassium carbonate,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Crude protein; Electrolytes. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700016 |
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| Pereira,Rosana Cristina; Ribeiro,Karina Guimarães; Andrade,Rodrigo Duarte de; Silva,Janaina de Lima; Silva,Enilson de Barros; Fonseca,Dilermando Miranda da; Cecon,Paulo Roberto; Pereira,Odilon Gomes. |
| The objective of this study was to assess the effect of applying N and K2O at different times after harvest on the structure and production characteristics of Marandu and Xaraés cultivars of Brachiaria brizantha. Two greenhouse 4 × 2 factorial experiments using a randomized block design with eight treatments and four replicates were carried out. In experiment 1, the plants in pots were fertilized weekly with 50 mg/dm³ of N and K2O until a week before a uniformity cut, for a total of four applications. After cutting, plants were fertilized with 50 mg/dm³ of N and K2O at 0, 3, 6, and 9 days. Cultivars were evaluated after 44 days of regrowth. In experiment 2, a single 50 mg/dm³ dose of N and K2O was applied a week before the uniformity cut, and 100 mg/dm³ of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Dry matter; Leaf/stem ratio; Nitrogen uptake; Number of leaves; Number of tillers. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300012 |
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| Ferreira,Antônio Hosmylton Carvalho; Lopes,João Batista; Abreu,Márvio Lobão Teixeira de; Merval,Ramon Rêgo; Ribeiro,Mabell Nery; Silva,Francisco Eduardo Soares; Ramos,Lidiana de Siqueira Nunes; Andrade,Francisco Teixeira. |
| The objective of this study was to analyze the effect of whole cassava root scrapings at different levels in diets for broilers in the period of 22 to 42 days of age in high-temperature environments on performance, as well as to evaluate the metabolizability of dry matter (DM), crude protein (CP) and gross energy (GE) and nitrogen balance. A total of 400 male Ross broilers were used for evaluation of performance and 80 birds of the same strain were used in the metabolism experiment. The design was of randomized block with five treatments and four replications. The experimental unit was represented by twenty birds on the performance evaluation and four birds were housed in metabolic cages for the metabolism evaluation. The treatments consisted of diets... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative feed; Crude protein; Dry matter; Gross energy; Metabolizability; Performance. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600018 |
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| Pizzuti,Luiz Angelo Damian; Alves Filho,Dari Celestino; Brondani,Ivan Luiz; Freitas,Leandro da Silva; Metz,Patrícia Alessandra Meneguzzi; Callegaro,Álisson Marian; Pacheco,Rangel Fernandes; Pereira,Lucas Braido. |
| Production parameters of intercropped pastures of oat and rye grass managed with beef heifers supplemented with brown rice meal and/or protected fat were evaluated. Twenty-eight Charolais × Nellore crossbred heifers at initial average age of 18 months and initial average live weight of 274.9 kg were utilized in the experiment. Animals were kept on oat + rye grass pastures and distributed in the following treatments: no-supplementation (NS): heifers kept only in pastures; Megalac (MEG): supplementation with protected fat; brown rice meal (BRM): supplementation with BRM; BRM + MEG: supplementation with BRM plus protected fat. The greater participation of oat leaf was from July 5th to August 10th, 2009 and of rye grass, from August 30th to September 26th,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Forage loss; Forage mass; Intake; Leaf blade offer. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800018 |
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| Castagnara,Deise Dalazen; Krutzmann,Alexandre; Zoz,Tiago; Steiner,Fábio; Conte e Castro,Ana Maria; Neres,Marcela Abbado; Oliveira,Paulo Sérgio Rabello de. |
| The objective of this study was to evaluate the effect of fertilization with zinc or boron on the growth and dry matter production, nutritional value and accumulation of nutrients in white oats. The study comprised two experiments conducted in glasshouses, the first consisting of the application of four doses of zinc (0, 0.2, 0.4 and 0.6 mg/dm³) in the form of zinc sulphate (20% Zn), and the second consisting of the application of four doses of boron (0, 0.2, 0.4 and 0.6 mg/dm³) in the form of Borax (11% B). The experimental design in each case was a randomized block design, with five replicates. Fertilization with zinc and boron increased the growth of white oats, but had no significant effect on the nutritional value of the forage. Higher levels of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa; Crude protein; Dry matter. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700007 |
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| Pariz,C.M.; Andreotti,M.; Bergamaschine,A.F.; Buzetti,S.; Costa,N.R.; Cavallini,M.C.; Ulian,N.A.; Luiggi,F.G.. |
| It was evaluated the effect of the absence and of application of three nitrogen doses (50, 100 and 200 kg ha-1of N) and four harvest times in the winter/spring season (from July to October) on dry mass yield (DMY), on the relative chlorophyll contents (ICF _ leaf chlorophyll index) and on the contents of total digestible nutrients (TDN), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin, and their respective correlations on Tanzania and Mombaça grasses after intercrop with corn in distroferric red latosol (Oxisol) soil as well. It was used a random block design, in split-plot with four replicates. The greatest DMY occured with the increase of photoperiod (from August), neverthless responses to nitrogen fertilization... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop-livestock integration; Crude protein; Megathyrsus maximum; Neutral and acid detergent fiber; No-tillage system; Total digestible nutrients. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000400005 |
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| Registros recuperados: 75 | |
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