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Search Results: 1 - 10 of 93480 matches for " Azevêdo José Augusto Gomes "
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Avalia o da divergência nutricional de variedades de cana-de-a úcar (Saccharum spp.)
Azevêdo José Augusto Gomes,Pereira José Carlos,Carneiro Pedro Crescêncio Souza,Queiroz Augusto César de
Revista Brasileira de Zootecnia , 2003,
Abstract: O objetivo do trabalho foi avaliar a divergência nutricional de variedades de cana-de-a úcar, utilizando a análise de componentes principais, visando identificar três variedades representativas dessa divergência. As variedades de cana-de-a úcar (Saccharum spp.) avaliadas neste estudo foram: RB855113, RB765418, RB855536, SP79-2233, RB845257, SP80-180, RB855453, RB855336, SP80-1842, SP81-1763, SP80-4445, SP79-1011, RB739359, RB867515 e SP80-3280, colhidas aos 426, 487 e 549 dias após o plantio. As variáveis discriminatórias utilizadas foram fibra em detergente neutro (FDN), hemicelulose, lignina, fra o indegradável da FDN e taxa de degrada o da fra o potencialmente degradável da FDN. Houve diferen as para todas as variáveis estudadas, exceto para a fra o indegradável da FDN. A avalia o da divergência nutricional das variedades de cana-de-a úcar baseou-se nos três primeiros componentes principais, explicando 87,8% da varia o total. A FDN e a fra o indegradável da FDN foram as variáveis de menor importancia para explicar a variabilidade nutricional das variedades. A variedade SP80-1842, colhida aos 426 dias após o plantio, e a variedade SP79-1011, colhida aos 549 dias, foram as que apresentaram maior dispers o dos escores nos três primeiros componentes principais, sendo consideradas as mais dissimilares, enquanto a variedade RB845257, colhida aos 487 dias após o plantio, localizou-se em posi o intermediária entre ambas. A análise de componentes principais foi também eficiente em selecionar as variedades com diferentes épocas de colheita.
Composi o químico-bromatológica, fracionamento de carboidratos e cinética da degrada o in vitro da fibra de três variedades de cana-de-a úcar (Saccharum spp.)
Azevêdo José Augusto Gomes,Pereira José Carlos,Queiroz Augusto César de,Carneiro Pedro Crescêncio Souza
Revista Brasileira de Zootecnia , 2003,
Abstract: Os objetivos do trabalho foram quantificar a composi o químico-bromatológica; determinar as fra es de carboidratos; e estimar as variáveis de cinética de degrada o dos carboidratos fibrosos (CF) e n o-fibrosos (CNF) de três variedades de cana-de-a úcar divergentes nutricionalmente. As variedades utilizadas foram SP80-1842, SP79-1011 e RB845257. As variedades de ciclo de produ o intermediário apresentaram maiores valores de FDN e FDA comparadas à variedade de ciclo precoce. As rela es FDN/Pol (polariza o do caldo) encontradas foram, respectivamente, 2,7; 2,8; e 2,3 para as variedades SP80-1842, RB845257 e SP79-1011. A variedade SP79-1011 apresentou menor fra o C e maior fra o B2 dos carboidratos (27,8 e 33,3%). Houve diferen as, por meio da técnica gravimétrica, para o tempo de coloniza o e a degradabilidade efetiva da FDN, com superioridade para a variedade SP79-1011, que apresentou valores respectivos de 7,9 h e 10,3%. Houve efeito apenas para o volume máximo de gás dos CNF, com superioridade das variedades de ciclo intermediário SP79-1011 e RB845257. A variedade SP79-1011 foi a que apresentou melhores características produtivas, composi o químico-bromatológica, além de melhores valores das variáveis de cinética de degrada o dos carboidratos fibrosos (CF) e n o-fibrosos (CNF). A técnica de produ o de gás apresentou melhores resultados que aqueles apresentados pela técnica gravimétrica.
Nutritional characterization of co-product silages of pejibaye Caracteriza o nutricional de silagens do coproduto da pupunha
Leandro Silva Oliveira,Luiz Gustavo Ribeiro Pereira,José Augusto Gomes Azevêdo,Márcio dos Santos Pedreira
Revista Brasileira de Saúde e Produ??o Animal , 2010,
Abstract: The objective in this work was to evaluate the fermentation kinetic; chemical composition and “in vitro” dry matter digestibility (IVDMD) of co-product silage from the extraction of peyibaye palmetto. The experimental treatments utilized were co-product extraction of peyibaye palmetto: in nature, with 10% of cassava meal, with 10% of corn meal, with 10% of palm kernel cake, with 1% of urea and wilted. The silos were opened after 1; 3; 5; 7, 14, 28 and 56 days. The experimental design utilized was a completely randomized design with factorial 6 x 7 (treatments and days after silage), with two repetitions. The pH ranged from 3.78 to 3.93. The silage with cassava or corn meal had less concentration of neutral detergent fiber, acid detergent fiber, cellulose and lignin. The content of crude protein of the silage with urea was greater than the other treatments. The additions of cassava or corn meal result in increase of IVDMD percentage. The silages showed appropriate values of ammonia nitrogen. The co-product silage of peyibaye palmetto extraction has conservation potential in silage form, and the addition of 10% of cassava meal improved its quality. Objetivou-se com este trabalho avaliar a dinamica de fermenta o, a composi o química e a digestibilidade in vitro da matéria seca (DIVMS) das silagens do coproduto da pupunha. Os tratamentos constituíram-se no coproduto da pupunha: in natura, emurchecido, com 10% de farelo de mandioca, com 10% de fubá de milho, com 10% de torta de dendê e com 1% de uréia. Os silos experimentais foram abertos com 1; 3; 5; 7; 14; 28 e 56 dias. O delineamento experimental foi o inteiramente casualizado em esquema fatorial 6 x 7 (tratamentos e períodos de fermenta o) com duas repeti es. O pH variou de 3,78 a 3,93. As silagens com farelo de mandioca ou fubá de milho apresentaram menores concentra es de fibra detergente neutro, fibra detergente ácido, celulose e lignina. Houve redu o nos teores de matéria seca no decorrer da abertura dos silos. O teor de proteína bruta da silagem com uréia foi superior. A adi o de farelo de mandioca ou fubá de milho aumentou a DIVMS. As silagens apresentaram valores adequados de nitrogênio amoniacal. O coproduto da extra o do palmito da pupunha apresenta potencial de conserva o na forma de silagem, e a adi o de farelo de mandioca melhora o seu valor nutritivo.
Características agron micas de variedades de milho para produ o de silagem = Agronomic characteristics of maize varieties for silage production in the submédio S o Francisco river valley
Rafael Dantas dos Santos,Luiz Gustavo Ribeiro Pereira,André Luis Alves Neves,José Augusto Gomes Azevêdo
Acta Scientiarum : Animal Sciences , 2010,
Abstract: O objetivo deste trabalho foi avaliar a produtividade de massa seca e massa verde, altura de inser o da espiga, número de espigas por planta, altura das plantas e a rela o espiga, colmo e folha de seis variedades de milho indicadas para a regi o semiárida brasileira (BR 5033 - Asa Branca, BR 5028 - S o Francisco, BRS 4103, BRS Caatingueiro, BRS Assum Preto e Gurutuba), visando à produ o de silagem. O experimento foi conduzido nas dependências da Embrapa Semiárido, adotando-se o delineamento experimental de blocos casualizados com seis tratamentos e quatro repeti es. As variedades Gurutuba e BRS 4103 obtiveram as maiores produtividades de massa verde (38,7 e 40,0 t ha-1). Do mesmo modo, essas duas variedades e aBR 5028 - S o Francisco se destacaram pela produ o de massa seca (16,0; 16,5 e 15,8 t ha-1, respectivamente). A variedade BRS Caatingueiro apresentou número de espigas planta-1 (1,6) superior ao das demais. Entre os materiais avaliados para produ o de silagem na regi o do Submédio do Vale do S o Francisco, destacaram-se as cultivares Gurutuba, BR 5028 - S o Francisco e BRS 4103. Os resultados obtidos para produ o de massa seca (t ha-1) e número deespigas planta-1, assim como a rela o espiga, colmo e folha atestam a possibilidade de utiliza o das variedades avaliadas para a produ o de silagem na regi o semiárida brasileira. The objective of this study was to evaluate the dry and fresh matter yield, height of ear insertion, number of ears per plant, plant height and the ear stem-1 leaf-1 ratio of six maize varieties recommended for the Brazilian semi-arid region (BR 5033 - Asa Branca, BR 5028 - S o Francisco, BRS 4103, BRS Caatingueiro, BRS Assum Preto and Gurutuba) aiming at silage production. The experiment was carried out at Embrapa Semi-Arid, in a completely randomized design with six treatments and four replications. The varieties Gurutuba and BRS 4103 achieved the highest yields of fresh forage (38.7 and 40.0 t ha-1). These two varieties and BR 5028 - S o Francisco showed the highest dry matter yield (16.0, 16.5 and 15.8 t ha-1, respectively). However, the variety BRS Caatingueiro presented a higher number of ears per plant (1.6) than those of the other varieties. Among the materials evaluated for silage production in the Submédio S o Francisco river Valley, Gurutuba, BR 5028 - S o Francisco and BRS 4103 stood out. The results obtained for dry matter production (t ha-1) and number of earsper plant, as well as the ear stem-1 leaf-1 ratio, indicate the possibility of using the evaluated varieties for silage production in the Brazilian
Performance of dairy calves fed milk, milk replacer or post-weaning concentrate with acidifiers
Ribeiro, Marinaldo Divino;Pereira, José Carlos;Queiroz, Augusto César de;Cecon, Paulo Roberto;Detmann, Edenio;Azevêdo, José Augusto Gomes;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000500024
Abstract: the objective of this study was to evaluate the effect of the addition of acidifiers to milk, milk replacer or post-weaning concentrate on the performance and health status of weaning and post-weaning calves. three experiments were carried out, in the first experiment 62 holstein × zebu crossbred calves (males and females), reared from birth to 60 days of age, were distributed and fed milk with or without acidifier. from the third day, the calves were suckled (5l of milk/d) for 56 days, split into two meals. the acidifier was added to milk at the time of feeding. from the second week of calf's age a starter diet (18% of cp) was also offer. in second experiment, the same animals from first experiment, but from 61 to 120 days of age were distributed and fed (2 kg/d) post-weaning concentrate (18% of cp) with or without acidifier and cynodon dactylon hay ad libitum. in third experiment, 16 male holstein × zebu crossbred calves, reared from birth to 60 days of age, were distributed and fed milk replacer with or without acidifier. the acidifier used in the first and third experiments was composed by the citric, lactic, fumaric, and phosphoric acids, and vitamin c (liquid diet); and by betaglucans, flavonoides, linoleic and oleic and citric acids, and vitamin c (solid diet). the addition of acidifier to milk or to post-weaning concentrate did not affect the dry matter (dm) and cp intakes, which were 818 and 196; 1740 and 217 g/d respectively. similarly, it did not show high average daily gains, with 525 and 513 g/d, respectively. the addition of acidifiers to milk replacer showed results similar to those observed in calves fed milk. therefore, the use of acidifiers in milk, milk replacer or in the post-weaning concentrate did not result in beneficial effects for calves.
Valor nutritivo de silagens de capim-elefante emurchecido ou com adi??o de farelo de cacau
Carvalho, Gleidson Giordano Pinto de;Garcia, Rasmo;Pires, Aureliano José Vieira;Pereira, Odilon Gomes;Azevêdo, José Augusto Gomes;Carvalho, Bruna Mara Aparecida de;Cavali, Jucilene;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000700006
Abstract: the experiment was carried out to evaluate the nutritive value of elephant grass silage wilted under the sun light for eight hours. other treatments involved the same elephant grass without exposing to sun light but with addition of 0, 7, 14, 21, and 28% of cocoa meal (cm) at the ensilage process. the pvc silos used in the experiment measured 0.15 m of diameter and 0.30 m of height. during the ensiling process the forage was compressed until reach 500 kg/m3. the addition of cm on elephantgrass during the ensiling process increased efficiently the silage dm concentration. the treatment of 7% addition of cm resulted in dm concentration similar to the wilted treatment. the treatments involving addition of cm presented high tn, ee, lig, ndin, and adin concentrations. reductions in ndf, adf, cel, hem, ash, tdn, and ivdmd concentrations were detected with the addition of cm. the estimated tdn of wilted treatment was greater than the other treatments with or without cm. although the cm reduced ivdmd, the 7 and 14% levels of cm inclusion resulted in elevated digestibility over 60%. the wilting and cm addition may be used as alternatives to increase silage dm concentration.
Valor nutritivo e características fermentativas de silagens de capim-elefante com adi??o de casca de café
Carvalho, Gleidson Giordano Pinto de;Garcia, Rasmo;Pires, Aureliano José Vieira;Azevêdo, José Augusto Gomes;Fernandes, Francisco éden Paiva;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800022
Abstract: the experiment evaluated the chemical composition, in vitro dm digestibility (ivdmd), and fermentative characteristics of elephant grass silages with different coffee hull levels. the elephant grass presented 17.2% of dry matter (dm), cut with 45 days of growing. the coffee hull addition levels were 0, 6, 12, 18, and 24%, in fresh matter basis (weight/weight) with four replications per treatment. the material was ensiled in cylindrical plastic silos. in the ensiling process, the forage packing density was 500 kg/m3. it was observed increase of dm, acid detergent fiber, acid detergent insoluble nitrogen, and lignin concentration, as a function of coffee hull levels. crude protein showed quadratic behaviour, estimating maximum cp value of 9.9% for the 16.4% coffee hull addition level. neutral detergent fiber reduced linearly and silage lactic acid concentration showed quadratic behaviour as a function of coffee hull levels, estimating maximum value of 11.4% to 25.6% hull level. coffee hull was efficient to increase silage dm concentration; however, the silage ivdmd decreased. the coffee hulls use in elephantgrass ensilage improved the fermentative characteristics of the silage.
Nutritional divergence in genotypes of forage peanut
Ferreira, Alexandre Lima;Maurício, Rogério Martins;Pereira, Luiz Gustavo Ribeiro;Azevêdo, José Augusto Gomes;Oliveira, Leandro Silva;Pereira, José Marques;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000400005
Abstract: the objective of this study was to evaluate the nutritional divergence between ten genotypes of forage peanut, based on chemical composition as well as fermentation and in vitro degradation kinetic characteristics. treatments consisted of ten genotypes of arachis pintoi, namely eight accessions (31135, 30333, 15121, 31828, 15598, 31534, 13251 and 31496) and two cultivars (cv. belmonte and cv. amarillo). the genotypes were harvested in each plot at a height of 3 cm from the ground, in 42-day intervals, during the time of heaviest rainfall. for the multivariate analysis the following variables, the following were used: crude protein, neutral detergent fiber, potential degradation in 48 hours, degradation rate of insoluble potentially degradable fraction and degradation rate of non-fibrous carbohydrate. the application of the hierarchical clustering analysis, using the euclidian distances matrix of standardized averages allowed for the identification of five homogeneous groups. among them, the accessions 31828, 31534, 15121 and cv. belmonte stood out nutritionally among the remaining genotypes evaluated, depicting as promising for the utilization in ruminant feeding.
Efeitos da inclus?o e dos tempos de exposi??o da cana-de-a?úcar ao óxido de cálcio sobre os parametros digestivos e fisiológicos de novilhas nelores
Pina, Douglas dos Santos;Valadares Filho, Sebasti?o de Campos;Azevêdo, José Augusto Gomes;Barbosa, Analívia Martins;Valadares, Rilene Ferreira Diniz;Detmann, Edenio;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000700026
Abstract: it was aimed to evaluate the effect of inclusion and times of sugar cane exposition to whitewash on intake and total and partial digestibility of nutrients and ruminal parameters and to compare titanium dioxide and chromium oxide as markers to estimate fecal dry matter excretion and dry matter abomasal flow. it was used six rumen and abomasum cannulated nellore females, with average body weight of 250 ± 19 kg, distributed in an incomplete 6 x 6 latin square design. the experiment was set in a 3 x 2 factorial scheme with three levels of whitewash (0; 0.5 or 1.0% natural matter) and two times of sugar cane storage (0 and 3 days). there was no effect of storage times neither interaction among levels of whitewash and storage times on the intake of nutrients. however, levels of whitewash linearly increased consumption of dry matter (dm), organic matter (om) and non-fibrous carbohidrates (nfc).storage times reduced total apparent digestibility of dry matter, organic matter and neutral detergent fiber corrected for ash and protein (ndfap), but they did influence ruminal apparent digestibility of the nutrients. the inclusion of whitewash increased the consumption of total digestible nutrients (tdn), but it did not affect total digestibility and ruminal digestibility of the nutrients. the markers produced similar results for the estimates of total and ruminal apparent digestibility of all the evaluated nutrients. interactions for ruminal ph were observed. however, values of amonical nitrogen were only influenced by sampling times. addition of whitewash does not affect preservation of sugarcane, but it positively influences consumption of dm, om, and tdn of the animals. the markers produced similar estimative to total tract and ruminal apparent digestibility of all nutrients. titanium dioxide and chromium oxide markers produce similar estimates of digestibility.
A meta-analysis of dry matter intake in Nellore and Zebu-crosses cattle
Azevêdo, José Augusto Gomes;Valadares Filho, Sebasti?o de Campos;Pina, Douglas dos Santos;Chizzotti, Mario Luiz;Valadares, Rilene Ferreira Diniz;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000800024
Abstract: the study was carried out to develop and to evaluate new equations to predict dry matter intake (dmi) of nellore and zebu-crosses cattle using meta-analysis procedure. the data used to estimate the parameters were collected from independent performance experiments using growing and fattening nellore and zebu-crosses cattle, and they were compiled from 561 experimental units. before proposing an equation to predict dmi, it was observed that the genetic group was a source of statisticaly significant variation. therefore, equations to predict dry matter intake in the zebu-crosses and nellore cattle were independently developed. the regression equations for zebu-crosses cattle were: dmi = -2.6098 + 0.08844bw0.75 + 4.4672adg - 1.3579adg2 and dmi = -1.0094 + 0.01608bw + 4.4363adg -1.2548adg2. the regression equations for nellore cattle were: dmi = -2.7878 + 0.08789bw0.75 + 5.0487adg - 1.6835adg2 and dmi = -1.3559 + 0.0159bw + 5.6397adg - 1.8494adg2. in order to evaluate fitted equations, it was utilized data from independent experiments published from 2005 to 2008 in the revista brasileira de zootecnia. the equations (dmi) for nellore overpredicted dry matter intake for estimates lower than 7 and higher than 10 kg·d-1. for zebu-crosses cattle, dispersions of 3 kg d-1 were observed when extreme intakes were evaluated, however, when the equation included bw 0.75, the intercept did not differ from zero and the slope did not differ from 1. it is not possible to fit only one equation for preditcting dmi for beef cattle in tropical conditions, because there are differences between zebu and zebu-crosses. fitted equations that include adg and bw 0.75 should be used as an alternative method to predict dry matter intake of zebu-crosses and nellore beef cattle in tropical conditions.
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