Teores de proteína bruta no concentrado e níveis de suplementação para vacas leiteiras em pastagens de capim-braquiária cv. marandu no período da seca

Pimentel, Joabe Jobson de Oliveira; Lana, Rogério de Paula; Graça, Décio de Souza; Matos, L. L. de; Teixeira, Rafael Monteiro Araújo

doi:10.1590/s1516-35982011000200025

Cited by 9 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the digestibility of NDFcp (Table 6), there was no effect of castor bean meal inclusion; however, there was a lower digestibility than that found in the literature (PIMENTEL et al, 2011;SILVA et al 2009), which is due to the amount of EE consumed. The excess of this nutrient, according to Jenkins and Mcguire (2006), has a toxic effect on the microorganism, inhibiting the cellular growth, mainly the cellulolytic bacteria that acts mainly in the digestion of the cellular wall, and also the excess of fat can generate a fiber encapsulation, making it difficult the microbial adhesion to the cell wall.…”

Section: Resultsmentioning

confidence: 57%

“…This difference may be due to the heterogeneity of castor bean byproducts. The low DMI in relation to the other studies with pastured dairy cattle (PIMENTEL et al, 2011) is related to the low availability and allowance of forage (Table 3), due to the climatic conditions, mainly the lack of rainfall, which was expected during the course of the experiment. According to Silva et al (2009), the availability of forage is directly related to the total DMI, so when the animal is subjected to forage shortage, it results in a reduction in DMI, and the animal needs to increase the grazing time.…”

Section: Resultsmentioning

confidence: 61%

See 1 more Smart Citation

Performance and nutritional parameters of lactating cows on pasture receiving castor bean meal

Souza

Silva

et al. 2017

SCA

View full text Add to dashboard Cite

This study aimed to evaluate the inclusion of castor bean meal in the diet for lactating cows on Bracharia brizhanta pasture and its implications for nutritional and productive parameters. Eight crossbred cows were distributed in two 4 x 4 Latin squares, with four (0%; 3.33%; 6.66% and 10%) inclusion levels of castor bean meal in the total diet. The experiment consisted of four experimental periods of 21 days each. The digestibility and dry matter intake were estimated from fecal output, checked with the aid of external (chromium oxide) and internal (iNDF) indicators. Urine and milk were collected to determine the nitrogen balance and microbial protein production. The inclusion of different levels of castor bean meal in the diet for lactating cows did not affect the intake of dry matter and nutrients, and the same lack of effect was found for the digestibility of dry matter and total digestible nutrients, variation in body weight, milk production, chemical composition of milk, microbial production and nitrogen balance. The inclusion of up to 10% castor bean meal in the total diet did not influence productive parameters evaluated, and the use was conditioned to the price of castor bean meal. Key words: Nitrogen balance. Consumption. Milk production. Microbial protein. ResumoObjetivou-se avaliar a inclusão de farelo de mamona na alimentação de vacas lactantes em pastejo de Bracharia brizhanta e suas implicações nos parâmetros nutricionais e produtivos. Foram utilizadas oito vacas mestiças distribuídas em dois quadrados latinos 4 x 4, com quatro níveis de inclusão de farelo de mamona na ração total; 0%; 3,33%; 6,66% e 10%. O experimento foi constituído de quatro períodos experimentais, com duração de 21 dias cada. A digestibilidade e o consumo de matéria seca foram estimados a partir da produção fecal, verificada com o auxílio de indicadores externo (oxido de cromo) e interno (FDNi). Foi feita a coleta de urina e leite para determinação do balanço de nitrogênio

show abstract

Section: Resultsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 61%

Performance and nutritional parameters of lactating cows on pasture receiving castor bean meal

Souza

Silva

et al. 2017

SCA

View full text Add to dashboard Cite

show abstract

“…As vacas arraçoadas apresentaram melhor condição corporal no parto do que aquelas dos demais tratamentos (p<0,05). Pimentel et al (2011) observaram maior consumo de capim-marandu em vacas que receberam 2,0 kg de suplemento, na estação seca, em comparação àquelas que receberam apenas sal mineral. Isso foi atribuído ao efeito associativo positivo da suplementação no consumo do pasto.…”

Section: Resultsunclassified

“…Há relatos de aumento da reabsorção de osso (Ekelund et al, 2006) e de redução da formação de osso (Puggaard et al, 2011) com o aumento da demanda por P em vacas, por mecanismos pouco conhecidos (Karn, 2001). Assim, as vacas poderiam utilizar as reservas ósseas para manter a integridade dos processos metabólicos, em períodos de deficiência de P, como no tratamento MM durante a estação seca, desde que recebessem dieta adequada para reabilitação de suas reservas em outra fase do ciclo .…”

Section: ) -------------------------------------(%) -----------------unclassified

Retirada do fósforo suplementar na estação seca para vacas Nelore em pastejo

Nogueira¹,

Nicodemo²,

Thiago³

et al. 2011

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar o desempenho reprodutivo de vacas Nelore em pastos de capim-marandu, após a retirada do fosfato bicálcico da mistura mineral, na estação seca. Sessenta matrizes receberam, durante seis anos, mistura mineral completa na estação chuvosa. Na estação seca, os tratamentos consistiram de: mistura mineral completa (MMC); MMC sem fosfato bicálcico (MM); e MM + concentrado. As pastagens foram manejadas de forma a não limitar a disponibilidade de matéria seca. A retirada do fosfato bicálcico do suplemento mineral, durante a estação seca, não prejudicou o desempenho reprodutivo de vacas, avaliado pela taxa de prenhez, intervalo de partos e retorno da atividade cíclica ovariana. Vacas que receberam concentrado na estação seca pariram em melhor condição corporal; vacas primíparas arraçoadas apresentaram menor número de dias vazios do que as vacas primíparas dos demais tratamentos. A retirada do fosfato bicálcico suplementar, fonte de fósforo e cálcio, na estação seca, não prejudica o desempenho de vacas multíparas em pastejo de capim-marandu.Termos para indexação: Brachiaria brizantha, atividade ovariana, reprodução, taxa de prenhez. Phosphate supplementation withdrawal during dry season for Nelore range cowsAbstract -The objective of this work was to evaluate the reproductive performance of Nelore cows at 'Marandu' palisade grass paddocks, after dicalcium phosphate withdrawal from the mineral supplement in the dry season. Sixty breeding cows received, during six years, a complete mineral mixture in the wet season. In the dry season, the treatments consisted of: a complete mineral mixture (MMC); MMC without dicalcium phosphate (MM); and MM plus a concentrate. Pastures were managed in order to allow for adequate dry matter availability. The removal of dicalcium phosphate from the mineral supplement, during the dry season, did not affect the animal reproduction performance which was evaluated as pregnancy rates, delivery intervals and return of oestrous cycles. Cows receiving concentrate in the dry season had higher body score at delivery; primiparous cows which fed concentrate showed a lower number of days open, in comparison to the primiparous ones of the other treatments. Dicalcium phosphate withdrawal from the mineral supplement, source of phosphorus and calcium, during the dry season, does not affect the reproductive performance of multiparous range cows grazing 'Marandu' palisade grass.

show abstract

“…However, their use decreases linearly the milk yield with the increase in the amount supplied (Lana 2009, Silva et al 2009, Oliveira et al 2011, Teixeira et al 2011. Moreover, the ingredients that compose the concentrate are expensive, raising the feeding costs , Vilela et al 2006, Pimentel et al 2011. Therefore, a balanced supply of concentrates is fundamental to attain economic viability of supplementation.…”

Section: Palavras-chavementioning

confidence: 99%

Dairy cows feeding with sorghum silage supplemented with concentrate

Pimentel

Lana

Oliveira

et al. 2013

Pesqui. Agropecu. Trop.

Self Cite

View full text Add to dashboard Cite

Concentrated feed can be used to increase the milk yield in dairy farms. However, the feeding cost increases when concentrates are used and, sometimes, farmers lose competitiveness, if the cows do not produce what is expected with supplementation. Thus, this study aimed at evaluating the nutrients intake, milk yield and composition and live weight change of dairy cows fed with sorghum silage alone or supplemented with concentrates. Nine crossbred cows (Holstein-Gyr) were allocated in three balanced Latin squares and fed with sorghum silage supplemented with minerals (0.2 kg) or with 2.6 kg (38.5% of crude protein) or 5.0 kg (20% of crude protein) of concentrate per day, aiming at supplying the same amount of crude protein (1.0 kg day-1). The dry matter intake and milk yield were higher for the cows fed with concentrate, independently of its protein level. The productive response (in kg of milk per kg of concentrate) was 1.67 and 0.83, respectively for the low and high supplemental levels. The cows that received only minerals lost weight, while those fed with concentrate gained weight. The cows which produced 13.0 kg of milk day-1 showed a higher increase in milk yield when fed with supplements containing high protein and mineral contents. The response for milk production per kg of concentrate was higher when lower amounts of concentrate with high protein and mineral levels were used, allowing a reduction in the production costs.

show abstract

Teores de proteína bruta no concentrado e níveis de suplementação para vacas leiteiras em pastagens de capim-braquiária cv. marandu no período da seca

Cited by 9 publications

References 21 publications

Performance and nutritional parameters of lactating cows on pasture receiving castor bean meal

Performance and nutritional parameters of lactating cows on pasture receiving castor bean meal

Retirada do fósforo suplementar na estação seca para vacas Nelore em pastejo

Dairy cows feeding with sorghum silage supplemented with concentrate

Contact Info

Product

Resources

About