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Search Results: 1 - 10 of 177862 matches for " Rilke Tadeu Fonseca de;Bertechini "
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Níveis de óleo e adi o de complexo enzimático na ra o de frangos de corte
Pucci Luiz Eduardo Avelar,Rodrigues Paulo Borges,Freitas Rilke Tadeu Fonseca de,Bertechini Antonio Gilberto
Revista Brasileira de Zootecnia , 2003,
Abstract: Dois experimentos foram conduzidos para avaliar o efeito da adi o de óleo de soja e de um complexo enzimático em ra es à base de milho e farelo de soja, sobre o desempenho de frangos de corte e a digestibilidade dos nutrientes. No experimento 1, foram utilizados 960 pintos de corte, n o sexados, os quais receberam os tratamentos em esquema fatorial 4 x 2 (quatro níveis de inclus o de óleo de soja: 0; 2,5; 5,0 e 7,5%, com ou sem adi o de um complexo enzimático contendo amilase, xilanase e protease), em quatro repeti es de 30 aves cada, no período de 1 a 21 dias de idade. Dos 22 aos 42 dias de idade, todas as aves receberam uma mesma ra o de crescimento, para avalia o de possível efeito residual dos tratamentos aplicados na fase inicial de cria o sobre a fase seguinte. Aos 21 dias de idade, 90 aves (três machos e duas fêmeas de cada unidade experimental) foram transferidas para uma sala de metabolismo (experimento 2), em que as aves receberam as mesmas ra es experimentais, para determina o dos valores energéticos e dos coeficientes de digestibilidade da matéria seca e do extrato etéreo. N o houve efeito da adi o do complexo enzimático, nem intera o dos níveis de óleo e suplementa o com enzimas sobre o desempenho das aves. O valor energético das ra es melhorou em 2,3% com a adi o de óleo, n o havendo efeito da adi o de enzimas. O nível de 2,33% de óleo permitiu máxima digestibilidade do extrato etéreo. Concluiu-se que a inclus o de óleo na ra o melhorou o desempenho das aves e a convers o alimentar permaneceu constante a partir de 2,18% de inclus o.
Níveis de cálcio em ra es de frangos de corte na fase inicial suplementadas com fitase
Schoulten Neudi Artemio,Teixeira Ant?nio Soares,Freitas Rilke Tadeu Fonseca de,Bertechini Ant?nio Gilberto
Revista Brasileira de Zootecnia , 2003,
Abstract: Com o objetivo de avaliar níveis de cálcio em ra es suplementados com enzima fitase para frangos de 1 a 21 dias de idade, foi conduzido um experimento com 600 pintos de um dia da linhagem Hubbard-MPK. As aves foram distribuídas em um delineamento inteiramente casualizado, arranjo fatorial cinco x dois (níveis de cálcio x sexos), com três repeti es e 20 aves por parcela. A ra o basal, com 0,54% de fósforo total e 600 unidades de fitase/kg, foi balanceada para atender às exigências nutricionais das aves conforme o NRC (1994), exceto para o cálcio, cujos níveis foram 0,46; 0,67; 0,88; 1,09 e 1,30%. Aos 14 dias, duas aves de cada tratamento foram transferidas para gaiolas de metabolismo para coleta total das excretas e aos 21 dias, duas aves de cada tratamento foram abatidas para retirada da tíbia esquerda para análises posteriores. Os machos apresentaram maior consumo e ganho de peso, sendo que este apresentou redu o linear conforme o nível de cálcio foi elevado. Os níveis de 0,67 e 0,71% resultaram em melhor digestibilidade da matéria seca e maior reten o de nitrogênio, respectivamente. As fêmeas apresentaram teores de cinzas e cálcio, na tíbia, superiores aos dos machos (1,68 e 2,34%, respectivamente). O nível de 0,55% de cálcio proporcionou a máxima deposi o de cinzas (51,5%), enquanto o nível de 0,59%, a máxima calcifica o (17,8%). A deposi o de fósforo apresentou efeito quadrático, em fun o dos níveis de cálcio, sendo que o nível de 0,75% proporcionou a maior deposi o (10,8%), e a deposi o de manganês foi reduzida linearmente com a eleva o do nível de cálcio na ra o. Conclui-se que níveis elevados de cálcio em ra es suplementadas com fitase afetaram negativamente o ganho de peso, a deposi o de fósforo e manganês na tíbia e que os baixos níveis prejudicaram a digestibilidade da matéria seca e a reten o de nitrogênio.
Teor de proteína no metabolismo do nitrogênio e da energia em suínos durante o crescimento
Oliveira, Vladimir de;Fialho, Elias Tadeu;Lima, José Augusto Freitas;Bertechini, Ant?nio Gilberto;Freitas, Rilke Tadeu Fonseca de;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000400020
Abstract: an experiment was conducted in the department of animal science at the universidade federal de lavras (federal university of lavras) for evaluate the effects of protein levels in the nitrogen and energy balance. twenty crossbred barrows were housed individually metabolism cages and distributed in four treatments. treatments were isoenergetics and isolisinics diets formulated according ideal ratio of amino acids, but with different crude protein levels (16, 14, 12 and 10%). the pigs were fed three times energy required for maintenance, which was assumed to be 106 kcal of me/kg of metabolic body weight 0.75. the rations were adjusted each day on the basis of an estimated weight gain. the experiment was conducted in two consecutive periods of 12 days each. seven first days were used for adaptation of animals and the five last days was used total of feces and urine collection. ferric oxide was used as a marker. the experimental design was balanced changeover in two periods. the decrease of crude protein levels resulted in linearly reduction (p<0.001) of total nitrogen excretion. for each percent reduction in dietary cp, urine nitrogen excretion was reduced about 10.8%. nitrogen retention was decreased linearly (p>0.01) for those pigs fed diets with reduced protein. however, nitrogen efficiency utilization of intake nitrogen increased proportionally with decreased crude protein levels. the metabolization coefficients of energy diets showed similarity (p>0.05) values, but metabolizable :digestible energy ratio were inversely proportionally to the crude protein levels. in conclusion, the reduction of crude levels protein of rations decrease nitrogen retention, although result less nitrogen excretion and increase efficiency utilization of nitrogen intake.
Influência do tempo de coleta e metodologias sobre a digestibilidade e o valor energético de ra??es para aves
Rodrigues, Paulo Borges;Martinez, Ricardo de Souza;Freitas, Rilke Tadeu Fonseca de;Bertechini, Ant?nio Gilberto;Fialho, Elias Tadeu;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000300021
Abstract: a digestibility assay were carried out to evaluate, in consecutives periods, the total excreta collection method and the chromium oxide method as a marker. apparent metabolizable energy corrected by nitrogen retention (amen) and aparent digestibility of dry matter coefficient (addmc) of broiler diet based in a ground corn and soybean meal containing 19% crude protein and 3.100 kcal me/kg. sixty adult leghorn cockerels weigh, in average, 2.350±105 g were used. each cockerel participates in the evaluation of the two methods simutannialy in consecutives periods. a split plots experimental design experiment was used to evaluate the two métodhs. in the chromium oxid method the treatments were defined as a 4x5 factorial arrangemente (chromium oxide levels 0.2, 0.4, 0.6 and 0.8% and collection time 1 to 5 days), totalizing 20 treatments in the plot, in two continuous periods (sub-plots), with three replicates by period. in the total excreta collection method the treatments were defined as five collection times (1 to 5 days) in the plot and the two continuous periods in the subplot with twelve replicates per period. the use of continuous periods did not affect amen or addmc. in the total excreta collection method the values of amen and addmc reached a plateau after two days of collection, showing that the collection time could be reduced by three days without affecting the determinated values. the data showed interaction between chromium oxide levels with collection times for the amen and addmc. three days of excreta collection were enough to determine with accuracy both amen and addmc of the diets based on ground corn and soybean meal. the use of three days of collection and 0.665% of chromium oxide in the diet was possible to determine similar values for amen and addmc in the two methods.
Valores energéticos de sojas integrais e de farelos de soja, determinados com galos adultos e por equa??es de predi??o
Ost, Paulo Roberto;Rodrigues, Paulo Borges;Fialho, Elias Tadeu;Freitas, Rilke Tadeu Fonseca de;Bertechini, Antonio Gilberto;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000200027
Abstract: a metabolism trial was conducted with the objective to determine the values of apparent metabolizable (ema), corrected apparent (eman), true (emv) and corrected true energy (emvn) of toasted whole soybean, micronized whole soybean and five brands of soybean meal through the forced feeding method with adult roosters and afterwards, from the experimental results obtained, it was also validate equations to predict emvn as related with chemical composition of the feeds. the forced feeding method was utilized, by using 24 adult leghorn roosters with means 2.35 ± 165 g. the rooster was considered as an experimental unit and each feed was given to 6 roosters (6 replicates), two replicates in each time. simultaneously, 6 roosters were kept in fasting for determination of the endogenous and metabolic losses. before the experimental period, each rooster was maintained without any feed for 24 hours for emptying of the digestive tract and then forced to ingest 30 grams of the test feed. for that reason, four collections of excreta were done every 12 hours, to avoid fermentation. at the end of this period, the feeds and also the excreta were homogenized for analysis of dry matter, nitrogen and gross energy and then calculated the values of energy. the values of emvn calculated were then contrasted with values of emvn estimated from the prediction equations presented in the national literature for groups of feeds similar to those of the present work. the values of emvn of the soybean meals ranged from 2531 to 2730 kcal/kg of dm and those of toasted and micronized whole soybean were 3732 and 4027 kcal/kg of dm, respectively. for the whole soybeans and soybean meals, the equation which best estimated the values of energy were tmen = 2690.62 - 40.87adf + 19.96ndf + 63.09ee. in general, the equations tested in the present work shown not good estimates of the values of emvn, so, they are not adequate to be utilized as a predictor of energetics values in practice.
Energia metabolizável de alguns alimentos energéticos para frangos de corte, determinada por ensaios metabólicos e por equa??es de predi??o
Nagata, Adriano Kaneo;Rodrigues, Paulo Borges;Freitas, Rilke Tadeu Fonseca de;Bertechini, Ant?nio Gilberto;Fialho, Elias Tadeu;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000300025
Abstract: two metabolism assays were carried out with chicks in growth (traditional method of total collection of excreta) in the animal science department of ufla, lavras - mg, to determinate of the nitrogen-corrected apparent metabolizable energy (amen) of some feedstuffs, as well as the determination of the energy values by prediction equations presented in the national and international literature. in the assay i, it was determined amen of some energy alternative feedstuffs to the corn (corn germ, corn quirera, ground and grain millet and ground and grain sorghum) and, in the second, amen of the seven corn hybrids. at same time to the experiments, it were realized laboratory analyses for determination centesimal composition of the tested feedstuffs. the food composition it was used in the prediction amen by equations. the calculated values were, then, compared with observed, using the spearman correlation and scott-knott test. in addition, confidence intervals were obtained by the metabolic assays. ground millet amen was similar to amen grain millet (3223 and 3279 kcal/kg dm respectively), being the same observed for the sorghum (3529 and 3573 kcal/kg dm, ground and grain, respectively). the amen for the corn germ was 3503 kcal/kg dm, while, for the corn quirera, it was 3351 kcal/kg dm. the corn hybrids energy values varied from 3665 to 3804 kcal/kg dm. among the studied equations, the 4021.8 - 227.55ash equation only correlated (p<0,01) with amen mean value observed in vivo, estimating the largest number of energy values inside of calculated confidence intervals. the other equations were not correlated (p<0,01) with the amen values. the results obtained in this assays, allow concluded that the 4021.8 - 227.55ash equation should be used to predict eman values of the studied feedstuffs.
Níveis de óleo e adi??o de complexo enzimático na ra??o de frangos de corte
Pucci, Luiz Eduardo Avelar;Rodrigues, Paulo Borges;Freitas, Rilke Tadeu Fonseca de;Bertechini, Antonio Gilberto;Carvalho, Ezequiel Malfitano;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000400017
Abstract: two experimental assays were carried out to evaluate the effect of the soybean oil and enzymatic complex addition in corn and soybean meal based diets on the broilers performance and nutrients digestibility. in the experiment 1, 960 broiler chickens, unsexed, received the treatments into 4 x 2 factorial scheme (four levels of soybean oil addition, 0; 2.5; 5.0 and 7.5%, with or without addition of a enzymatic complex with amylase, xylanase and protease) in four replicates of 30 chickens each, from 1 to 21 days of age. after the first phase, the broilers fed a standard diet until 42 days of age to evaluate a possible residual effect of the treatments on the performance from 22 to 42 days old. at the 21 days of age, 90 chickens (three male and two female of each replicate) were transfered to metabolism room (experiment 2), were the chickens received the same experimental diets to determination of the energetic values and dry matter and ether extract digestibility coefficients. the results shown no effect of the enzymatic complex addition nor interaction of the oil levels and enzyme supplementation on the broilers performance. the energetic value of the diets enhanced in 2.3% with the oil addition, without enzyme supplementation effect. the oil level of the 2.33% allowed a maximum digestibility of the ether extract. it was concluded that oil addition in the diet result in a better broilers performance and feed conversion reached the plateau in the 2.18% oil level.
Desempenho e composi??o corporal de suínos alimentados com ra??es com baixos teores de proteína bruta
Oliveira, Vladimir de;Fialho, Elias Tadeu;Lima, José Augusto de Freitas;Freitas, Rilke Tadeu Fonseca de;Sousa, Raimundo Vicente;Bertechini, Ant?nio Gilberto;
Pesquisa Agropecuária Brasileira , 2006, DOI: 10.1590/S0100-204X2006001200012
Abstract: the aim of this study was to evaluate the performance and the body composition of swine fed diets with low crude protein, but supplemented with amino acids. thirty-eight young castrated swine were used, out of which eight were slaughtered in the beginning of the experiment. the remaining 30 swine were allotted in five treatments and six replications using a randomized block experimental design. the treatments consisted of rations with 10, 12, 14 and 16% protein, and a treatment of ration with 10% protein supplemented with nitrogen from a nonessential amino acid source. swine fed with rations 12, 14 and 16% protein had greater daily gain and better feed conversion. the protein deposition was bigger in swine feeding rations 16 and 14%, in comparison to those fed rations with 10% protein. the rate of lipid deposition was lower in swine fed on ration with 16% protein, and higher in swine fed ration with 10% protein. the crude protein reduction levels of the ration until 12% limit do not influence the performance and the retention of protein in swine, since diets are supplemented with essential amino acids. however, the protein level decrease of the ration increases body fat.
Características de carca?a e peso de vísceras em suínos alimentados com ra??es contendo baixos teores de proteína bruta
Oliveira, Vladimir de;Fialho, Elias Tadeu;Lima, José Augusto Freitas;Freitas, Rilke Tadeu Fonseca de;Bertechini, Ant?nio Gilberto;Araujo, Jocélio dos Santos;
Ciência Rural , 2006, DOI: 10.1590/S0103-84782006000600035
Abstract: one experiment was conducted in the animal science department of university of lavras (ufla) to evaluate the effects of rations with low crude protein, supplemented with essential and non essential amino acids, in carcass characteristics and weight visceral organs of swine of the 32 to the 57kg. thirty crossbred barrows were divided in five treatments that had consisted of rations with different crude protein (cp) levels (10; 12; 14; and 16%). a fifth treatment added to non essential aminoacid in the ration with less cp level (10+nne) was included. after it slaughter visceral organs had been removed, emptied and weighed. the nitrogen consumption did not influence (p>0.05) the weight of the liver, pancreas, kidneys and heart. the weight of the total gastrointestinal tract and the weights of the tgi plus organs have been bigger (p<0.05) in treatments 14 and 16 in comparison with treatments 10+nne and 10. it is concluded that crude protein level does not has effect in the weight of viscera intestines, but modifies the weight of the gastrointestinal tract of growing swine.
Energia metabolizável de ingredientes protéicos determinada pelo método de coleta total e por equa??es de predi??o
Zonta, Márcia Cristina de Mello;Rodrigues, Paulo Borges;Zonta, Augusto;Freitas, Rilke Tadeu Fonseca de;Bertechini, Antonio Gilberto;Fialho, Elias Tadeu;Pereira, Carlos Ribeiro;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000600024
Abstract: a metabolism assay were carried out with broilers in growth phase (traditional method of total collection of excreta) to determinate the nitrogen-corrected apparent metabolizable energy (amen) of some feedstuffs, as well as the determination of the energy values by prediction equations published in the national and international pappers. it was determined amen of eight fedstuffs, five soybean meal samples and three processed full fat samples (extruded, toasted and micronized). the estimated values were compared with observed, using the spearman correlation and confidence intervals obtained by the metabolic assay. the energy values of soybean meals samples (1, 2, 3, 4 and 5), full fat soybean extruded, toasted and micronized were 2601, 2650, 2727, 2500, 2426, 3674, 3609, 4296 kcal/kg dm, respectively. among the studied equations, the amen = -822,33 + 69,54cp - 45,26adf + 90,81ee and amen = 2723,05 - 50,52adf + 60,40ee equation correlated (p<0,05) with amen mean value observed in vivo, estimating the largest number of energy values inside of calculated confidence intervals. the equation amen = 37,5cp + 46,39ee + 14,9nfe estimated all the samples of soybean meal, as well the equation amen = 1822,76 - 99,32cf + 60,50ee + 286,73ash - 52,26starch was good for full fat soybean samples, both equations was correlated (p<0,05). the results obtained in this assay, allow us to conclude that the equation amen = -822,33 + 69,54cp - 45,26adf + 90,81ee and amen = 2723,05 - 50,52adf + 60,40ee shoud be used to predict amen values of the studied feedstuffs. the equation amen = 37,5cp + 46,39ee + 14,9nfe is more indicated for predict the energy values of soybean meals.
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