Does frequency of protein supplementation affect performance of cattle under grazing in tropical pastures?

Sousa, Luiz Carlos Oliveira de; Palma, Malber Nathan Nobre; Franco, Márcia de Oliveira; Detmann, Edênio

doi:10.1016/j.anifeedsci.2022.115316

Cited by 8 publications

(6 citation statements)

References 29 publications

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“…However, similarly to the results obtained in the present study, with the exception of ber digestibility in the + 40 period, studies with grazing Nellore females commonly do not demonstrate additive associative effects of supplementation on forage intake and ber digestibility (Silva et al, 2017;Moura et al, 2020). In fact, the effects of protein supplementation seem to be more evident regarding the productive performance of the animals (Sousa et al, 2022).…”

Section: Discussionsupporting

confidence: 82%

“…Studies in tropical conditions indicate that the productive response of grazing cattle to protein supplementation is inversely related to the nutritional value of the forage (Almeida et al, 2022;Sousa et al, 2022). In association, there is a lot of evidence that supplementation of beef cows in the prepartum period, which coincides with the dry season, is more important than in the postpartum period, and this response is attributed to the physiological conditions inherent to the phase (Hess et al, 2005; Diskin and Kenny., 2016).…”

Section: Discussionmentioning

confidence: 99%

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Changes in nutritional characteristics and performance of grazing Nellore cows during the peripartum phase receiving or not protein supplementation

David

Matos

Domingos

et al. 2022

Preprint

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We objective was to understand the changes in nutritional characteristics and performance of grazing Nellore cows during the peripartum receiving or not supplementation. Forty multiparous cows were used, divided into two treatments: CON - mineral mixture and SUP – protein supplementation. Digestibility trial was performed (-45,-30,-15, + 20, +40; days relative to calving). The average daily gain (ADG) pre and postpartum of the cows were measured and, in gestational and maternal tissues in the prepartum, in addition of body condition score (BCS). The calves were weighed at birth and at 30 days of age. There was an effect of treatment and period (P ≤ 0.10) for dry matter, organic matter and crude protein intake, while forage intake was similar (P ≥ 0.10), but with a period effect (P ≤ 0.10). There was 14.37% decrease in dry matter intake from day − 30 to day − 15 of prepartum. In the postpartum period, at 20 days of lactation, there was increase of 72.66% in relation to the period − 15. There was interaction between period and treatment for all digestibilities (P ≤ 0.10). No differences were observed in postpartum ADG (P ≥ 0.10), BCS at calving and postpartum (P ≥ 0.10). However, higher total ADG and in maternal tissues (P ≤ 0.10) were observed on supplemented animals, but with ADG in gestational tissues similar (P ≥ 0.10). It is concluded that there is a decrease in voluntary intake in grazing pregnant cows close to parturition and greater performance of animals supplemented in prepartum.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Changes in nutritional characteristics and performance of grazing Nellore cows during the peripartum phase receiving or not protein supplementation

David

Matos

Domingos

et al. 2022

Preprint

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“…However, despite the better quality, the utilization of basal nutritional resources is not thought to be optimized (Detmann et al, 2014), as nutritional unbalances may not allow an optimal rumen microbial growth or metabolizability of absorbed nutrients. In this context, there is a growth potential of approximately 200g/animal/d that is unused and can be achieved through supplementation with specific nutrients (Poppi and McLennan, 1995;Sousa et al, 2022). When animals are fed on medium-to high-quality tropical forages, it has been demonstrated that the supplementation with nitrogenous compounds is able to improve the metabolic efficiency of the animals and increase the nitrogen accretion in the body (Figueiras et al, 2016;Lazzarini et al, 2016;Reis et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Association of virginiamycin and multiple supplement for cattle fed a high-quality tropical forage

et al. 2022

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The aim of this study was to evaluate the effect of adding virginiamycin to either mineral mixture or multiple supplement on intake, digestion, ruminal fermentation profile, rumen microbial production, blood metabolites, and liver metabolism of zebu heifers fed a high-quality tropical forage. Eight Brahman heifers were assigned to a replicated 4 × 4 Latin Square design. The treatments were: mineral mixture, mineral mixture with virginiamycin, multiple supplement, and multiple supplement with virginiamycin. The basal diet consisted of a high-quality Tifton 85 hay (Cynodom sp.) chopped at 10-cm particle size and fed twice daily. The mineral mixture was provided daily at 120 g/animal. The multiple supplement was formulated to provide 300 g of crude protein (CP)/kg as fed, contained mineral mixture, corn grain, and urea: ammonium sulfate, and was daily provided at 200 g/animal. The mineral mixture and multiple supplement provided the same daily amount of minerals. The amount of supplemental virginiamycin was based on a maximum theoretical response on animal performance (50 mg/100 kg body weight) and daily mixed to the supplements types. The treatments were compared according to a 2 × 2 factorial arrangement (mineral mixture and multiple supplement, with or without virginiamycin). The virginiamycin supplementation did not alter either voluntary intake or digestibility (P≥0.44). Using the multiple supplement decreased forage (P<0.05) and digested organic matter (DOM, P<0.10) intake, but increased dietary CP : DOM ratio (P<0.01). The multiple supplement increased the ruminal ammonia concentration (P<0.04) and the acetate-to-propionate ratio (P<0.06). Virginiamycin increased urinary nitrogen (N) when provided along with multiple supplement (P<0.05). Fecal N was decreased by multiple supplement (P<0.06). Despite these effects, no effect was verified on either body N accretion (P≥0.48) or microbial N production in the rumen (P≥0.27). Virginiamycin decreased the blood IGF-1 (P<0.07). The hepatic gene expression for propionyl-CoA carboxylase was increased by virginiamycin (P<0.01). Virginiamycin increased the hepatic gene expression of both citrate synthase and pyrivate carboxylase when mineral mixture was provided (P<0.01), but decreased it when animals were fed multiple supplement (P<0.04). Using a low-intake multiple supplement with a high CP content for cattle fed high-quality forage causes a substitutive effect on forage intake, but keeps nitrogen accretion unchanged. That pattern indicates an improvement in feed efficiency. On the other hand, virginiamycin supplementation seems to cause some post-prandial influences, which may vary according to the type of supplement. Those influences apparently improve animal efficiency.

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“…Estudos em condições tropicais indicam que a resposta produtiva dos bovinos em pastejo à suplementação proteica é inversamente relacionada ao valor nutritivo da forragem (Almeida et al, 2022;Sousa et al, 2022). Em associação, existem diversas evidências de que a suplementação de vacas de corte no pré-parto, que coincide com a estação seca, é mais importante que no pós-parto, sendo essa resposta atribuída às condições fisiológicas inerentes à cada fase (Hess et al, 2005;Diskin e Kenny., 2016).…”

Section: Discussionunclassified

“…Contudo, similarmente ao resultado obtido no presente trabalho, à exceção da digestibilidade da fibra no período +40, comumente estudos com fêmeas Nelore gestantes em pastejo não demonstram efeitos associativos aditivos da suplementação sobre o consumo de forragem e a digestibilidade da fibra (Silva et al, 2017;Ferreira et al, 2020;Moura et al, 2020). Na verdade, os efeitos da suplementação proteica parecem ser mais evidentes no que concerne ao desempenho produtivo dos animais (Sousa et al, 2022).…”

Section: Discussionunclassified

Avaliações nutricionais e produtivas no periparto de vacas Nelore em pastejo

David¹

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Objetivou-se avaliar o efeito da suplementação sobre o consumo voluntário, digestibilidade aparente e desempenho produtivo de vacas Nelore em pastejo durante o periparto, além do peso ao nascimento e o desempenho ponderal das proles. Adicionalmente, buscou-se entender como se altera o consumo voluntário desses animais em torno do parto. Foram utilizadas 40 vacas pluríparas Nelore com peso médio de 525±46 kg, divididas em dois tratamentos: CON - animais recebendo apenas mistura mineral durante todo o período experimental e, SUP - animais recebendo mistura múltipla durante todo o período experimental. Determinou-se o consumo voluntário e a digestibilidade aparente dos animais ao longo do periparto (-45,-30,-15, +20, +40; períodos relativos à data estimada ao parto), através de ensaios de digestibilidade. Para avaliação de desempenho produtivo as vacas foram pesadas para calcular os ganhos médios diários (GMD) pré e pós-parto, os GMD em tecidos maternos e gestacionais durante o pré-parto e avaliadas quanto ao escore de condição corporal (ECC) ao parto e durante o pós-parto. As crias foram pesadas ao nascimento e aos 30 dias de idade. Os dados foram analisados utilizando o procedimento MIXED do SAS, adotando 0,10 como nível crítico de probabilidade de erro do tipo I. Verificou-se efeito de tratamento e período (dias relativos ao parto) para os consumos de matéria seca total, matéria orgânica e proteína bruta, enquanto o consumo de forragem foi similar (P ≥ 0,10) entre os tratamentos, mas com efeito de período (P ≤ 0.10). Houve diminuição de 14,37 % no consumo de matéria seca total do dia -30 para o -15 dia do pré-parto. No pós- parto, verificou-se aos 20 dias de lactação, aumento de 72,66 % em relação ao período o dia - 15 do pré-parto. Houve interação entre período e tratamento para as digestibilidades aparentes da matéria orgânica (P ≤ 0.10), fibra insolúvel em detergente neutro corrigida para cinzas e proteínas (P ≤ 0.10) e proteína bruta (P ≤ 0.10). Não se observaram diferenças no GMD pós- parto (P ≥ 0,10) e ECC ao parto (P ≤ 0.10) e pós-parto (P ≥ 0,10). Porém, foram verificados maiores GMD total (P ≤ 0.10) e em tecidos maternos (P ≤ 0.10) nos animais suplementados, mas com GMD em tecidos gestacionais (P ≥ 0,10) similar entre os tratamentos. Conclui-se que há uma diminuição do consumo em fêmeas gestantes a pasto ao aproximar do parto, independentemente da suplementação. A suplementação não altera esse padrão de consumo, mas aumenta o desempenho produtivo no pré-parto desses animais. Palavras-chave: Bovinos de corte. Pastagem. Produção animal.

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Does frequency of protein supplementation affect performance of cattle under grazing in tropical pastures?

Cited by 8 publications

References 29 publications

Changes in nutritional characteristics and performance of grazing Nellore cows during the peripartum phase receiving or not protein supplementation

Changes in nutritional characteristics and performance of grazing Nellore cows during the peripartum phase receiving or not protein supplementation

Association of virginiamycin and multiple supplement for cattle fed a high-quality tropical forage

Avaliações nutricionais e produtivas no periparto de vacas Nelore em pastejo

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