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Search Results: 1 - 10 of 4422 matches for " Elias Tadeu;Bertechini "
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Composi??o e solubilidade in vitro de calcários calcíticos de Minas Gerais
Fassani, édison José;Bertechini, Antonio Gilberto;Kato, Reinaldo Kanji;Fialho, Elias Tadeu;Geraldo, Adriano;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000400026
Abstract: the experiment was carried out at the animal research laboratory the department of animal science of the federal university of lavras - ufla, in lavras - mg, brazil, with objective of evaluating the physical-chemistries characteristics of limestones used in the laying hens feeding. the experimental design was completely randomized in a 4x5 factorial arrangement, being four limestones extracted in different areas of minas gerais (ijaci, barroso, iguatama and formiga) in five particle size standardized (0.15-0.30, 0.30-0.60, 0.60-1.20, 1.20-2.00 and 2.00-4.00 mm), amounting twenty treatments, with eight replications. the limestones were directed to the laboratory where was determined the mineral composition and the in vitro solubility, certain for the method of the weight loss. the mineral analysis of the limestones, indicated some numerical differences mainly in elements as iron and manganese, besides detecting the presence of zinc and copper in smaller amount. there was interaction (p<0.01) among the limestones and the particle size for the in vitro limestones solubility and all the limestones presented reduction in the in vitro solubility with the particle size increase (p<0.01), however, presenting cubic response. the barroso limestone the most soluble was shown (p<0.01) in all the particle size and your in vitro solubility was superior to 12.5%, in the largest particle size studied (2.00-4.00 mm) what represented a rate of solubility of 33.3% above the certain value for the formiga limestone, that was it that less soluble (p<0.01) in the same particle size. through the found results it was verified that the in vitro limestone solubility is not only determined by the particle size in that the limestone comes.
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.
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.
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.
Desempenho e reten??o de nitrogênio de frangos de corte dos 22 aos 42 dias alimentados com ra??es com diferentes níveis de cálcio e suplementadas com Fitase
Teixeira, Ant?nio Soares;Schoulten, Neudi Artemio;Silva, Hunaldo Oliveira;Conte, Ademir José;Bertechini, Ant?nio Gilberto;Fialho, Elias Tadeu;
Ciência e Agrotecnologia , 2003, DOI: 10.1590/S1413-70542003000100024
Abstract: with the objective of evaluating the levels of calcium in the ration supplemented with phytase for broiler chickens from 22 to 42 days old, one experiment was conducted by using a total of 600 chickens of 22 days old hubardb-mpk strain, distributed in a completely randomized design, in five two factorial arrangement (levels of calcium of the diet x sexes), with three replicates of 20 birds per plot. the basal diets was formulated to meet the nutritional requirements of the broilers according to nrc (1994), except for calcium, whose levels were 0.40; 0.59; 0.78; 0.97 and 1.16% supplement with phytase. at 35 days old, two chickens of each treatment were transferred to the metabolism cages and after period of adaptation the excreta collection were made during four days. both feed intake and weight gain were 12.8 and 16% higher for the males (p<0.01) in relation to the females, respectively. there was no differences for feed intake, weight gain and feed conversion in relation to the levels of calcium in the diets (p>0.05) supplemented with phytase. the digestibility of dry matter was better with 0.88% of calcium in the diets and the higher nitrogen retention, was obtained with 0.70% of calcium. it was possible to conclude that the increasing levels of calcium in diets supplemented with phyitase for broilers from 22 to 42 days old did not influenced the broiler performance and also shown that very low levels of calcium in the diets impaired the digestibility of the dry matter and nitrogen retention.
Níveis de cálcio e granulometrias do calcário para frangas de reposi??o no período de 3 a 16 semanas de idade
Geraldo, Adriano;Bertechini, Ant?nio Gilberto;Murgas, Luís David Solis;Fialho, Elias Tadeu;Muniz, Joel Augusto;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000200026
Abstract: the present work was performed with the purpose of evaluating the effects of the nutritional levels o calcium and particle sizes of limestone replacement pullet rations on the body and morphometric development of the digestive tract. 1,400 replacement pullets of the lohmann lsl strain , employing crd in a 5 x 2 factorial scheme (calcium levels and particle size of limestone) with five replicates with 28, 18 and 16 birds per plot, respectively over the periods of 3 to 7, 8 to 12 and 13 to 16 weeks of age. the experimental diets were based on corn, soybean meal and wheat meal (wheat only at growing phase) supplemented with minerals, vitamins and phytase (500 ftu/kg), their being isoprotein, isocaloric and isophosphorus, their having as a phosphorus source monoammonium phosphorus and balanced according to the lohmann lsl strain handbook (lohmann, 1999), supplemented with limestone in fine (dgm = 0.135 mm) and gross (dgm = 0.899 mm) particle size to meet the levels of 0.60, 0.75, 0.90, 1.05 and 1.20% of total calcium in the diet. the performance in the period of 3 to 16 weeks , morphometry of the digestive tract and contents of ashes and minerals in the birds’ tibia of each plot slaughtered on the 16th week of age. ration consumption in the period presented a linear growth with the rise of calcium levels. there were no significant differences of weight gain, feed conversion and % digestive tract. on the 16th week of age, higher ash and calcium contents were achieved in pullets were fed gross particle size at the levels of 0.90 and 1.05% of calcium. in the initial and growing phases the level of 0.90% ca proved ideal in gross size particle for the osseous formation.
Efeito dos níveis de cálcio da ra??o suplementada com fitase sobre a deposi??o de minerais na tíbia de frangos de corte de 22 a 42 dias
Schoulten, Neudi Artemio;Teixeira, Ant?nio Soares;Conte, Ademir José;Silva, Hunaldo Oliveira;Bertechini, Ant?nio Gilberto;Fialho, Elias Tadeu;
Ciência e Agrotecnologia , 2003, DOI: 10.1590/S1413-70542003000100026
Abstract: with the aim of evaluating the effects of the levels of calcium in the ration supplemented with phytase for broiler chickens from 22 to 42 days old, on the deposition of minerals in the tibias, one experiment was conducted with 600 chickens of 22 days old (hubbard-mpk), distributed in a completely randomized design, in 5 x 2 factorial arrangement (levels of ca of the diet x sexes), with three repetitions of 20 birds per plot. the basal ration was balanced to meet the nutritional requirements of the birds according to nrc (1994), except for ca, whose levels were 0.40; 0.59; 0.78; 0.97 and 1.16%, supplemented with phytase . at 42 days of age, two chickens from each treatment were slaughtered for removal of the left tibia for the subsequent analyses. the contents of ashes in the tibia from female were 35% higher than those of the males. the deposition of ashes, ca, p, zn, mn and mg were not affected (p>0.05) by the levels of calcium in the ration supplemented with phytase. in conclusion the increasing levels of calcium with phytase supplementation in the diets did not affect the deposition of minerals in the tibias of chickens from 22 to 42 days old
Efeito da fitase e xilanase sobre o desempenho e as características ósseas de frangos de corte alimentados com dietas contendo farelo de arroz
Conte, Ademir José;Teixeira, Antonio Soares;Fialho, Elias Tadeu;Schoulten, Neudi Artêmio;Bertechini, Ant?nio Gilberto;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000500015
Abstract: the present work was designed to verify the effect of the use of phytase and xylanase upon the performance and bone deposition of minerals in broiler diets containing 15% of rice bran, low available phosphorus and without supplementation of iron, zinc, copper and manganese. the phytase utilized was the natuphos 5000 and the xylanase avizyme 1300. the experimental design was the completely randomized and the analysis of variance in a 4x2+1 factorial scheme. the control diet was made up of adequate levels of all nutrients without rice bran and without enzymes. the diets of the other treatments were formulated with 15% of rice bran with low available phosphorus (40% of the recommended) and without inorganic supplementation of fe, cu, zn and mn with four levels of phytase (0, 400, 800 and 1,200 units/kg) with or without xylanase (1kg/t). the variables analyzed at 21 and 42 days of age were performance and ash, p, zn, fe, mn and cu in the tibia. live weight and feed intake increased significantly with supplementation of phytase whereas feed conversion was not affected both at 21 and 42 days. the best level of phytase of 1.105 and 1.023 ftu/kg for better performance was reached at 21 and 42 days, respectively. the xylanase did not affect significantly live weight and feed intake. therefore the data shown a significant improvement in feed conversion at the two ages evaluated provided by lower feed intake by the birds fed diets supplemented with xylanase. the phytase levels shown a linear increase in the contents of ash and phosphorus in the tibia and did not affect the deposition of zn, fe, mn and cu in the two studied ages. the xylanase did not have any effect on the parameters evaluated in the tibia.
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.
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