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Search Results: 1 - 10 of 11970 matches for " 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%.
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).
Grazing management strategies for massaigrass-forage peanut pastures: 1. dynamics of sward condition and botanical composition
Andrade, Carlos Mauricio Soares de;Garcia, Rasmo;Valentim, Judson Ferreira;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200002
Abstract: this study was carried out from october 2002 to december 2003 to evaluate the dynamics of sward condition and botanical composition 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% live weight). sward condition was characterized in each grazing cycle in terms of the pre and post-grazing sward height, forage mass and percentage of bare ground. botanical composition (grass, legume and weeds) was evaluated before each grazing period. sward height and forage mass increased linearly with increasing herbage allowance (ha) levels, and higher values were observed during the rainy season. percentage of bare ground increased primarily at the lowest ha level. percentage of forage peanut increased throughout the experimental period, primarily in the barest and shortest swards, under the lowest ha level. in the last quarter of 2003 the legume constituted 23.5, 10.6 and 6.4% of the pasture forage mass, respectively, from the lowest to the highest ha level. these results suggest that forage peanut can be successfully associated with massaigrass, as long as the pre-grazing sward height is maintained shorter than 65-70 cm, which will prevent excessive shading to the legume.
Características do efluente e composi??o químico-bromatológica da silagem de capim-elefante sob diferentes níveis de compacta??o
Loures, Daniele Rebou?as Santana;Garcia, Rasmo;Pereira, Odilon Gomes;Cecon, Paulo Roberto;Souza, Alexandre Lima de;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000800007
Abstract: an experiment was conducted using elephant grass (pennisetum purpureum schum.) cv. cameroon, with the purpose of determining the quantitative and qualitative characteristics of effluent released, correlating this with levels of pressure and the quality of silage. the material with 13% of dry matter was ensiled in experimental plastic silos. the levels of pressure were: 356.67; 446.67; 531.33; 684.00 and 791.00 kg/m3. the effluent of silages with high moisture content was collected and measured during seven days. in silages with high moisture content, for level of 356.67 kg/m3, were found proportional losses to those found in high pressure (791.00 kg/m3). in relation of minimum of total losses, the pressure more desirable was 550.00 kg/m3, in this experimental conditions. the values of dob5 (14.596,69 mg/l), dqo (31.138,2 mg/l), dqo/dbo (2.38), ph (4.30), mg (0.3997% dm) and na (0.0008% dm) did not varied with pressure and number of days of collect. content of p, k, level of ammoniacal nitrogen, total nitrogen, organic nitrogen, crude protein and total solids were influenced by pressure and number of days.
Fatores limitantes ao crescimento do capim-Tanzania em um sistema agrossilvipastoril com eucalipto, na regi?o dos Cerrados de Minas Gerais
Andrade, Carlos Mauricio Soares de;Garcia, Rasmo;Couto, Laércio;Pereira, Odilon Gomes;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000500007
Abstract: a study was conducted in an agrosilvopastoral system, constituted by eucalyptus urophylla and panicum maximum cv. tanzania-1, to verify the hypothesis that there were other factors, besides the low light availability, affecting the normal growth of the grass, four years after its introduction in the system. a npk fertilization field trial was carry out, using the randomized block design, with the treatments in the 23 factorial outline, with two doses of nitrogen (0 and 100 kg/ha of n), phosphorus (0 and 70 kg/ha of p2o5) and potassium (0 and 100 kg/ha of k2o). the grass did not respond to p nor k fertilization, in spite of the low original p and k availability in the soil. however, with the application of nitrogen the rate of herbage accumulation was twice superior compared to control, showing that the grass growth was being restricted by the low n availability in the soil. the high response to the n fertilization showed that the shading was not the only factor limiting the understorey productivity and, also, that the established panicum maximum plants were not being negative and significantly affected by allelopathic substances produced by eucalypts.
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