Efeito da suplementação no desempenho de bovinos de corte em pastagem de Brachiaria brizantha cv. Marandu

Fernandes, Leonardo de Oliveira; Reis, Ricardo Andrade; Paes, José Mauro Valente

doi:10.1590/s1413-70542010000100031

Cited by 30 publications

(28 citation statements)

References 3 publications

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“…This response pattern was also verified by Fernandes et al (2010), who worked with animals supplemented with 6 g/kg BW during the rainy season, with a stocking rate of 6 AU/ha and a forage mass of 3,500 kg/ha and obtained gains of 0.870 kg/day. Only the animals receiving mineral supplements had higher gains than those observed in the present study (0.750 kg/animal/day), indicating a higher quality of the forage provided in that study.…”

Section: Resultssupporting

confidence: 53%

Performance of supplemented heifers on Marandu grass pastures in the wet-to-dry transition and dry seasons

Oliveira

Bertipaglia²,

Melo³

et al. 2012

R. Bras. Zootec.

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-The objective of the present study was to evaluate the characteristics of the sward canopy of Marandu grass during the rainy season, the wet-to-dry transition and the dry seasons, between March and September 2004, under intermittent grazing, and to correlate those characteristics with the performance of crossbred heifers receiving mineral supplements ad libitum or protein supplements. The experiment consisted of a randomized block design with three blocks (set of 13 paddocks), each containing five crossbred heifers per experimental unit, totaling 15 replicates. The heifers were given protein supplements daily in individual stalls and received an average 4 g/kg/day of the supplement during the rainy season and 5 g/kg/day during the dry season. Their weight gain was assessed monthly. The pasture structure was assessed through destructive sampling, and the bromatological composition of esophageal extrusa samples was also assessed. Analysis of variance was used to assess performance, and regression analysis was used to evaluate the sward canopy characteristics in relation to the months of the year. A cluster procedure was used to determine the similarity between the months of the year under assessment. Two different groups were formed for pasture evaluation: one group including the months of March to July and another group including the months of August and September. The first group exhibited a better canopy structure than the second group. This fact was corroborated by the animal performance, which was lower during the months of the second group. Low-intake protein supplementation was effective in increasing the performance of the grazing heifers. Pasture structure is critical for animal performance in a grazing environment, regardless of the type of supplementation.

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Section: Resultssupporting

confidence: 53%

Performance of supplemented heifers on Marandu grass pastures in the wet-to-dry transition and dry seasons

Oliveira

Bertipaglia²,

Melo³

et al. 2012

R. Bras. Zootec.

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“…These results demonstrate Gliricidia's potential as a forage plant because there was no difference between seasons in the total dry weight of forage produced, a pattern that is not commonly observed in tropical forages, which generally have their highest production rates during the rainy season (Fernandes et al, 2010). The management regime with a cutting frequency of 90 days and a residual height of 90 cm produced a total dry forage yield that was 9.7 t ha -1 higher than that reported by Barreto and Fernandes (2001) Different management regimes influence the growth and yield of Gliricidia, especially in the dry season.…”

Section: Resultsmentioning

confidence: 59%

The forage yield of Gliricidia sepium during the rainy and dry seasons following pruning management in Brazil

Edvan

Carneiro

Magalhães³

et al. 2014

Cienc. Inv. Agr.

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Gliricidia sepium (Jacq.) Steud. shows relatively little growth variation due to climatic differences throughout the year and between years. The purpose of this study was to evaluate various cutting strategies for the management of Gliricidia for forage production in dry and rainy periods of the year. A randomized-block factorial experimental design (12 × 2) was used for the study. The factorial setup consisted of 12 pruning management treatments (cuttings at 45, 60, 75 and 90 days with 30, 60 and 90 cm residual heights) and two periods (dry and rainy season) with four replicates. There were significant interactions between the management regime and the season for plant height, stem diameter, stem diameter and the weight of both fresh and dry forage. The treatment with a cutting frequency of 90 days and a residual height of 90 cm resulted in the highest final average height and the largest stem diameter in the dry period, with reductions of 7.65 and 1.5%, respectively, during the period of water scarcity. The 90 days × 90 cm treatment resulted in the highest production of fresh and dry forage biomass. Application of different cutting strategies to the Gliricidia plants influenced the diameters of the stems and buds, plant height and accumulation of forage biomass during the rainy and dry seasons. The highest cutting frequency (90 days) and lower intensity cutting (90 cm) provided greater stem diameter, number of shoots and plant height, and the higher forage yield of Gliricidia.

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“…No entanto, deve-se atentar de quanto desta proteína é efetivamente degradável no rúmen. Por esse motivo, a quantidade de PB na formulação de suplementos deve ser superestimada haja, visto que existem poucos trabalhos com gramíneas tropicais com este tipo de estudo (Reis et al, 2005(Reis et al, , 2007.…”

Section: Suplementação Durante O Período Das áGuasunclassified

“…No ponto em que o desempenho foi máximo em reposta a suplementação da dieta com concentrado, 0,3% do PV/dia, ou seja, na altura do dossel de 31,8 cm, o ganho estimado foi 28% superior ao dos animais suplementados com sal mineral. Fernandes et al, (2007), também demonstraram que pastos mantidos com (Mott, 1960), quando se utilizou a suplementação concentrada, visto que ao se utilizar sal mineral as repostas foram lineares. Assim, observou-se que a capacidade de suporte ótima foi obtida quando a lotação e a altura do pasto foram de 5,0 UA/ha e 23 cm, respectivamente utilizando suplementação de 0,3% do PV/dia (Figura 8).…”

Section: Impactos Da Suplementação Com Concentrado No Manejo Do Pastejounclassified

Suplementação da dieta de bovinos de corte como estratégia do manejo das pastagens

et al. 2009

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RESUMO -O manejo do pastejo permite que sistema com base na utilização de pastagem propicie altos rendimentos por animal e por área. Para isto, devem-se utilizar critérios de manejo com intuito de controlar, simultaneamente a qualidade e a quantidade de forragem e manter a sustentabilidade do sistema. A intensidade de pastejo é dinâmica, jamais permanece a mesma, mudando com a taxa de consumo pelos animais e também pelo crescimento das plantas, variando de hora a hora e dia a dia, por isso deve ser controla sistematicamente. Neste cenário, o consumo de forragem parece ser o fator que mais explica as variações no desempenho animal em relação a qualidade da forragem. A suplementação da dieta dos animais em pastejo com concentrado permite aumentar o desempenho de animais, reduzindo a idade de abate ou a da primeira cria. Contudo, as características nutricionais do suplemento devem variar em função da quantidade e da qualidade da forragem ofertada. Ao suplementar a dieta dos animais em pastejo com energia e proteína, pode-se manejar pastos mais baixos em relação a suplementação apenas com sal mineral, sem que ocorra redução da densidade populacional de perfilhos. Estas estratégias de manejo podem reduzir a probabilidade de degradação do pasto. Desta forma, a suplementação da dieta de animais permite aumento na capacidade suporte do pasto. Palavra-chaves: composição química, digestibilidade, gramíneas tropicais, manejo, pastejo, suplementos Supplementation of beef cattle as strategy of pasture managementABSTRACT -The grazing management system based on the intensive pasture utilization result in a high animal and area yield. In order to that to be possible, it should be used a management criteria aiming to control, simultaneously the quality and the amount of forage, maintaining the sustainability of the system. The grazing intensity is dynamic, it never keeps the same status, it can be changed with the animals rate intake, and also by the plants growth, changing every hour and day, due to that, it should be controlled systematically. In this scenery, the forage intake is the main factor which explains the variations in the animal performance in relation to the forage quality. Energy and protein supplementations of the grazing animals increase performance, reducing slaughter and the first birth age. However, the nutritional characteristics of the supplement should vary in function of the amount and quality of the forage allowed. Pastures grazed by supplemented animals can be managed at a lower height, compared to those grazed by animals supplemented with only mineral salt, without reducing the tillers population density. These management strategies can reduce the probability of future pasture degradation. Thus, supplementation of the diet of the grazing animals can increase the pasture carrying capacity.Key Words: chemical composition, digestibility, grazing, management, pasture, supplements IntroduçãoA partir da década de 90 profundas alterações tem ocorrido no cenário mundial da pecuária de corte associada à abertur...

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Efeito da suplementação no desempenho de bovinos de corte em pastagem de Brachiaria brizantha cv. Marandu

Cited by 30 publications

References 3 publications

Performance of supplemented heifers on Marandu grass pastures in the wet-to-dry transition and dry seasons

Performance of supplemented heifers on Marandu grass pastures in the wet-to-dry transition and dry seasons

The forage yield of Gliricidia sepium during the rainy and dry seasons following pruning management in Brazil

Suplementação da dieta de bovinos de corte como estratégia do manejo das pastagens

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