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Search Results: 1 - 10 of 30589 matches for " Pereira Odilon Gomes "
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Produtividade de matéria seca e composi??o mineral do capim-tifton 85 sob diferentes doses de nitrogênio e idades de rebrota??o
Ribeiro, Karina Guimar?es;Pereira, Odilon Gomes;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000400022
Abstract: the dry matter production and mineral content of tifton 85 bermudagrass (cynodon nlemfüensis x cynodon dactylon) on nitrogen rates (0, 100, 200, 300 and 400 kg/ha) and regrowth ages (28, 42 and 56 days) were evaluated. the experimental design was completely randomized with a split plot feature. the main plots referred to n-rates whereas subplots were regrowth ages. the forage yield ranged from 5.75 to 20.46, from 8.13 to 22.85 and from 10.52 and 25.23 t/ha of dm, in response to rates of 0 to 400 kg n/ha, in plants harvested at 28, 42 and 56 days of regrowth, respectively, with a response efficiency of 36.8 kg dm/kg n. the p contents decreased with n rates and plant age increased ranged from 0.27 to 0.16%. the k contents decreased as plant age increased; the maximum k content of 1.25, 1.11, and 0.96% were recorded for plant harvest with 28, 42 and 56 days of regrowth, respectively, fertilized with 55 kg n/ha/cutting. the average ca content was 0.48%. the mg content increased as n rates increased and decreased as plant age increased, with values between 0.24 and 0.45%.
Consumo, digestibilidade dos nutrientes e desempenho de bovinos de corte recebendo silagem de sorgo (Sorghum bicolor (L.) Moench) e diferentes propor es de concentrado
Pereira Dalton Henrique,Pereira Odilon Gomes,Valadares Filho Sebasti?o de Campos,Garcia Rasmo
Revista Brasileira de Zootecnia , 2006,
Abstract: Vinte e quatro bovinos machos, castrados, Holandês x Zebu (peso vivo inicial de 435 kg e 36 meses de idade) foram distribuídos em um delineamento em blocos casualizados, com seis repeti es para se avaliarem o consumo e a digestibilidade aparente total dos nutrientes, o ganho de peso, a convers o alimentar e o rendimento de carca a em bovinos de corte recebendo dietas contendo silagem de sorgo e concentrado nas propor es 80:20, 65:35, 50:50 e 35:65, com base na matéria seca. Os consumos de MS, MO, PB e NDT, em kg/dia, n o foram influenciados pelos níveis de concentrado nas dietas, enquanto os consumos de EE e MS (% PV e g/kgPV0,75) e os CNF, em kg/dia, aumentaram linearmente com o nível de concentrado. O consumo de fibra em detergente neutro (FDN), no entanto, independentemente da forma de express o, decresceu linearmente com o aumento dos níveis de concentrado. As digestibilidades aparentes totais de MS, MO e CNF n o foram influenciadas pelas dietas, registrando-se valores médios de 63,8, 65,1 e 82,2%, respectivamente. Entretanto, as digestibilidades aparentes de PB, EE e FDN reduziram linearmente com o incremento de concentrado às dietas. O ganho médio diário e a convers o alimentar n o foram influenciados pelas dietas, com valores médios de 1,40 kg/dia e 8,08 kg MS/kg de ganho de peso vivo (GPV), respectivamente. O peso final médio dos animais foi de 523 kg. O rendimento de carca a dos animais aumentou linearmente com o incremento dos níveis de concentrado nas dietas. A dieta com silagem de sorgo de boa qualidade, associada a 20% de concentrado, proporcionou produ o de carne com menor custo que as demais dietas.
INTAKE, DIGESTIBILITY AND PERFORMANCE OF BEEF CATTLE RECEIVING DIETS CONTAINING UREA IN DIFFERENT PROPORTIONS CONSUMO E DIGESTIBILIDADE DOS NUTRIENTES E DESEMPENHO DE BOVINOS DE CORTE RECEBENDO DIETAS COM DIFERENTES NíVEIS DE URéIA
Odilon Gomes Pereira,Viviane Glaucia de Souza,Sebasti?o de Campos Valadares Filho,Dalton Henrique Pereira
Ciência Animal Brasileira , 2008,
Abstract: Intake, apparent digestibility of nutrients, daily gain, feed conversion and the carcass yield in beef cattle receiving diets containing 0; 0.5; 1.0 e 1.5% of urea in total dry matter were evaluated. Twenty four crossed steers Holstein x Zebu (HxZ), castrated, with initial mean body weight of 290 kg were distributed in a completely randomized design. Sorghum silage was used as roughage adopting relation roughage:concentrate of 70:30 in dry matter basis. In order to determine the fecal excretion, indigestible acid detergent fiber was used as a marker. Intake and digestibility of nutrients were not influenced (P>0.05) by the proportions of urea in the diets. For intake and apparent digestibility of dry matter, mean values of 8.42 kg/day or 2.33% of BW and 64.52% were registered, respectively. Mean daily gain (1.05kg), feed conversion (8.07) and carcass yield (48.72%) were not influenced (P>0.05) by the proportions of urea in the diets. Levels of 1.5% of urea in dry matter of total diet can be used in the preparation of diets for finishing beef cattle (HxZ), without compromising intake and digestibility of nutrients and the animal performance as well. KEY WORDS: Carcass yield, feed conversion, feedlot, sorghum silage. Avaliaram-se o consumo e a digestibilidade aparente dos nutrientes, o ganho de peso, a convers o alimentar e o rendimento de carca a em bovinos de corte recebendo dietas contendo 0%; 0,5%; 1,0% e 1,5% de uréia na matéria seca total. Foram utilizados 24 animais mesti os Holandês x Zebu (HxZ), castrados, com peso vivo inicial médio de 290 kg, distribuídos em um delineamento inteiramente casualizado. Utilizou-se a silagem de sorgo como volumoso numa rela o volumoso:concentrado de 70:30, com base na matéria seca. Para determina o da excre o fecal, utilizou-se a fibra em detergente ácido indigestível como indicador. O consumo e a digestibilidade dos nutrientes n o foram influenciados (P>0,05) pelos níveis de uréia na dieta. Para o consumo e a digestibilidade aparente da matéria seca, verificaram-se valores médios de 8,42 kg/dia ou 2,33% do PV e 64,52%, respectivamente. O ganho médio diário (1,05kg), a convers o alimentar (8,07) e o rendimento de carca a (48,72%) também n o foram influenciados (P>0,05) pelos níveis de uréia na dieta. Níveis de até 1,5% de uréia na matéria seca da dieta total podem ser utilizados nas formula es de dietas para termina o de bovinos de corte (HxZ), sem comprometimento do consumo e digestibilidade dos nutrientes, bem como do desempenho animal PALAVRAS-CHAVES: Confinamento, convers o alimentar, rendimento de carca a
Produtividade e composi o bromatológica de Brachiaria spp., no Alto Vale do Jequitinhonha Productivity and bromatological composition of Brachiaria spp. in the Higher Jequitinhonha Valley
Rosana Cristina Pereira,Karina Guimar?es Ribeiro,Odilon Gomes Pereira,Janaina de Lima Silva
Ciência e Agrotecnologia , 2011,
Abstract: Avaliaram-se a produtividade de matéria seca (MS), propor o de laminas e composi o bromatológica de Brachiaria spp., colhidas com 42 dias de rebrota o, em Diamantina, MG. Para a determina o dos teores de MS, PB, FDN, FDA e lignina utilizaram-se o esquema em parcelas subsubdivididas, no DIC, com quatro repeti es. Nas parcelas foram distribuídas as cultivares Basilisk, Marandu, Xaraés, Llanero e B. humidicola comum; nas subparcelas, dois cortes, e, nas subsubparcelas, dois anos experimentais. A produ o de MS total e a propor o de laminas foram analisadas em esquema de parcelas subdivididas, com espécies/cultivares nas parcelas e anos nas subparcelas. A produ o de MS no segundo ano (3 cortes) foi mais alta que no primeiro (2 cortes), destacando-se as cultivares Basilisk, Xaraés e Llanero. De modo geral, as cultivares apresentaram teores satisfatórios de PB, mais altos no segundo ano. Os teores de FDN foram mais baixos no segundo ano e os de lignina mais baixos no primeiro ano. As cultivares Xaraés e Marandu destacam-se pela elevada propor o de folhas e apresentam composi o bromatológica semelhante a da cultivar Basilisk. Associando-se a composi o bromatológica com a produtividade de MS, recomendam-se as cultivares Xaraés e Basilisk para as condi es do Alto Vale do Jequitinhonha. Dry matter production, proportion of leaf blades and chemical composition of Brachiaria spp. harvested at intervals of 42 days of regrowth, in Diamantina, MG were evaluated. The DM, CP, NDF, ADF and lignin contents were analyzed in a split-split plot completely randomized design, with four replicates. Five cultivars of Brachiaria were distributed in the plots, two cuts in the split-plot, and two experimental years in the split-split plot. The dry matter production and the proportion of leaf blades were analyzed in a split plot completely randomized design, with cultivars in the plots and years in the subplots. The dry matter production in the second year (3 cuts) was higher than in the first (2 cuts), especially with the cultivars Basilisk, Xaraés and Llanero. Generally, the cultivars presented satisfactory levels of CP, with higher values in the second year. The contents of NDF were lower in the second year and the lowest levels of lignin were in the first year. Cultivars Xaraés and Marandu stand out for the high proportion of leaves and presented chemical composition similar to the Basilisk cultivar. Based on the chemical composition and dry matter production, Xaraés and Basilisk cultivars are recommended for cultivation in the Jequitinhonha High Valley.
Dynamics of sward condition and botanical composition in mixed pastures of marandugrass, forage peanut and tropical kudzu
Andrade, Carlos Mauricio Soares de;Garcia, Rasmo;Valentim, Judson Ferreira;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000300005
Abstract: this study was carried out to evaluate the dynamics of sward condition and botanical composition of a mixed pasture of marandugrass (brachiaria brizantha cv. marandu), forage peanut (arachis pintoi cv. mandobi) and tropical kudzu (pueraria phaseoloides), rotationally stocked at four daily forage allowance levels (6.6, 10.3, 14.3 and 17.9% of live weight). sward condition was characterized in each stocking cycle by measuring pre- and post-grazing sward height, forage mass and percentage of bare ground. botanical composition (grass, forage peanut, tropical kudzu and weeds) was evaluated before each stocking period. swards under smaller forage allowances presented lower height, forage mass and ground cover. this condition favored the growth of forage peanut, which constituted 21.1, 15.2, 8.4 and 3.8% of forage mass in the last quarter of the experimental period, from the lowest to the highest forage allowance, respectively. tropical kudzu was sensitive to all forage allowance levels and its percentage in the botanical composition was strongly reduced along the experimental period, especially during the dry season (july to september). forage peanut cv. mandobi and marandugrass form a more balanced mixture when pre-grazing sward height is maintained shorter than 45 cm. tropical kudzu is intolerant to intensive grazing management systems when associated to marandugrass.
Productivity, utilization efficiency and sward targets for mixed pastures of marandugrass, forage peanut and tropical kudzu
Andrade, Carlos Mauricio Soares de;Garcia, Rasmo;Valentim, Judson Ferreira;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000300006
Abstract: this study was carried out to evaluate the productivity and utilization efficiency of a mixed marandugrass (brachiaria brizantha cv. marandu), forage peanut (arachis pintoi cv. mandobi) and tropical kudzu (pueraria phaseoloides) pasture, rotationally stocked at four daily forage allowance levels (6.6, 10.3, 14.3 and 17.9% of live weight), in order to define sward management targets for these mixtures. in each stocking cycle, dry matter (dm) accumulation rates, defoliation intensity (%), grazing depth (%) and grazed horizon (cm) were evaluated. sward targets were defined according to the sward condition that best conciliated the grass-legume balance and the equilibrium between forage production and utilization. pastures submitted to higher forage allowance levels showed higher productivity, but were less efficiently utilized. it was not possible to establish sward management targets for marandugrass-tropical kudzu pastures. for marandugrass-forage peanut pastures the best sward state was set with forage allowance of 10.3% of live weight. under rotational stocking, the following sward targets were suggested for these pastures in the western amazon: pre-grazing height of 30-35 cm (june to september) or 45-50 cm (october to may) and post-grazing sward height of 20-25 cm (june to september) or 25-30 cm (october to may).
Composi??o química, caracteriza??o e quantifica??o da popula??o de microrganismos em capim-elefante cv. Cameroon (Pennisetum purpureum, Schum.) e suas silagens
Pereira, Odilon Gomes;Rocha, Karina Dosualdo;Ferreira, Celia Lucia de Luces Fortes;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800006
Abstract: values of ph, ammonia nitrogen/total nitrogen (nh3-n), chemical composition, in vitro dm digestibility (ivdmd) and microbial populations of elephantgrass silages produced with enzymatic-bacterial inoculants, were evaluated in six fermentation periods (1, 3, 7, 14, 28, and 56 days), using laboratory silos. a 6 x 3 (six fermentation periods x three inoculants) factorial arrangement of treatments in a completely randomized design, with three replicates, was used. the following bacterial inoculants were evaluated: control (without inoculant), sill all c4 (alltech of brazil) and bacto silo tropical c (katec). the cp, ndf and adf contents were affected only by the fermentation period. the ivdmd, however, was affected by the inoculant × fermentation period interaction.the ivdmd concentration, however, was affected by the interaction between inoculant and fermentation period. there was a significant effect of inoculant and period on ph value, being observed reduction of 0.5769; 0.62327, and 0.80218 units/day of fermentation for the control silage, silage treated with sil all, and bacto silo, respectively. it was observed inoculant × fermentation period interaction for nh3-n. the lactic acid bacteria population in the grass before ensiling was 104 cfu/gram of fresh forage, reaching maximum value of 108 cfu/gram of fresh silage at 14 days of fermentation to the control silage, and at 7 days of fermentation to the silages treated with inoculant. the enterobacter were not detected after the third day of fermentation and the maximum values of 104, <10, and 103 cfu/gram were registred for the silage to control, sil all, and bacto silo tropical c silages, respectively.
Produ??o e características do efluente e composi??o bromatológica da silagem de capim-elefante contendo diferentes níveis de casca de café
Bernardino, Fernando Salgado;Garcia, Rasmo;Rocha, Fernanda Cipriano;Souza, Alexandre Lima de;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000700004
Abstract: the experiment was carried out to evaluate the effects of levels (10, 20, 30 and 40%, based on fresh matter) of coffee hulls added to elephantgrass at ensilage on the bromatological composition, in vitro dry matter digestibility (ivdmd) of the resulting silage and the production and composition of the silo effluent. twenty cylindrical plastic silos measuring 0.25 m diameter x 0.75 m height were used. a complete randomized design was used with four replications. the results demonstrated coffee hulls efficiency on decreasing silage moisture, resulting in increase of dm content of 0.69% / unity of added additive. ph values decreased as levels of coffee hulls increased. the addition of coffee hulls favored the crude protein contents, which showed a quadratic effect, estimating maximum of 10.0% at 26.3% of coffee hulls addition. the addition of coffee hulls reduced ammoniacal nitrogen, insoluble neutral detergent fiber and ivdmd, and increased acid detergent insoluble nitrogen and lignin contents. acid detergent fiber and cellulose contents were not affected. effluent production during 21 days was reduced from 123.5 l/t (0.0% coffee hulls) to 26.7 l/t (10.0% coffee hulls). the dry matter, p, na and k contents did not varied with number of days of collect, although the mg content decreased and total nitrogen content increased. the values of biological oxygen demand and chemical oxygen demand were not affected. the addition of 20% of coffee hulls was efficient to eliminate effluent production and to produce a good quality silage.
Grazing management strategies for massaigrass-forage peanut pastures: 2. productivity, utilization and sward structure
Andrade, Carlos Mauricio Soares de;Garcia, Rasmo;Valentim, Judson Ferreira;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200003
Abstract: this study was carried out to evaluate the productivity, utilization and sward structure of a mixed massaigrass (panicum maximum x p. infestum, cv. massai) and forage peanut (arachis pintoi ac 01) pasture, intermittently stocked at three daily herbage allowance levels (9.0, 14.5 and 18.4% of live weight). in each grazing cycle, dry matter (dm) accumulation rates, defoliation intensity (%), grazing depth (%) and grazed horizon (cm) were evaluated. the structure of massaigrass tussocks was characterized in both dry and rainy seasons by measuring its pre-grazing morphological composition and post-grazing height and density (tussocks/m). pastures submitted to higher herbage allowance (ha) levels showed higher productivity, but were less efficiently utilized. on average, over the experimental period, dm accumulation rates increased linearly from 56.8 to 81.3 kg/ha/day as ha levels increased from 9.0 to 18.4% of live weight. however, defoliation intensity and grazing depth declined linearly with increasing ha levels. during the dry season, pre-grazing morphological composition of massaigrass was characterized by 41% of green leaf blades, 10% of pseudostems and 49% of dead material, irrespective of ha levels. in the rainy season, however, it showed higher percentage of green leaf blades and lower percentage of pseudostems when submitted to lower ha levels, although there were not differences in relation to percentage of dead material. the structure of massaigrass tussocks tended to deteriorate at high ha levels.
Grazing management strategies for massaigrass-forage peanut pastures: 3. definition of sward targets and carrying capacity
Andrade, Carlos Mauricio Soares de;Garcia, Rasmo;Valentim, Judson Ferreira;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200004
Abstract: this study was carried out to define sward management targets for mixed massaigrass (panicum maximum x p. infestum, cv. massai) and forage peanut (arachis pintoi ac 01) pastures in the western brazilian amazon. seasonal variation in the pasture carrying capacity was also analyzed. pastures were intermittently stocked at three daily herbage allowance levels (9.0, 14.5 and 18.4% of live weight) from october 2002 to december 2003. sward targets were defined in terms of the sward condition that best conciliated the grass-legume balance, the maintenance of the structure of massaigrass tussocks and the equilibrium between forage production and utilization. for the western brazilian amazon conditions, the following sward management targets can be recommended for mixed massaigrass and forage peanut pastures under intermittent stocking: pre-grazing height ranging from 50-55 cm (june to september) to 65-70 cm (october to may), and post-grazing height from 30-35 cm (june to september) to 35-40 cm (october to may). annual carrying capacity of this mixed pasture in 2003 was 2.7 au/ha. the average carrying capacity during the dry season (1.8 au/ha) was 50% lower than that observed during the rainy season (3.6 au/ha).
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