Effects of ruminal infusion of a slow-release polymer-coated urea or conventional urea on apparent nutrient digestibility, in situ degradability, and rumen parameters in cattle fed low-quality hay

Ribeiro, Sabrina Santos; Vasconcelos, J. T.; Morais, M.G.; Ítavo, Camila Celeste Brandão Ferreira; Franco, Gumercindo Loriano

doi:10.1016/j.anifeedsci.2010.12.003

Cited by 50 publications

(50 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These authors reported a significantly lower N digestibility with the polymer-coated slow-release urea (SRU) treatment than for the urea treatment. In contrast with the present findings (Table 4), Ribeiro et al (2011) found no differences in N digestibility between urea and Optigen® II treatments. According to the findings of this study, it could be suggested that post-ruminal N concentration would increase when Optigen® II is used to replace urea completely in a supplement, and therefore increased faecal N levels could be expected (Taylor-Edwards et al, 2009a).…”

Section: Resultscontrasting

confidence: 99%

“…The higher intake observed with Treatment 4 could be owing to improved fermentation associated with better synchrony of N release from Optigen® II with the slow-released fermentable energy from fibre, as well as the fast N release from urea at early stages that synchronized with the fast fermentable energy from starch. A similar finding was reported by Ribeiro et al (2011), who suggested that Optigen® II treatments might have provided sufficient N for rumen fermentation over an extended period. In contrast with this study and that of Ribeiro et al (2011), Wahrmund et al (2007 found no difference in DMI between the control, urea and Optigen® II treatments in a study that compared Optigen® II as a NPN source instead of urea in Bahia grass-fed animals.…”

Section: Resultssupporting

confidence: 87%

“…A similar finding was reported by Ribeiro et al (2011), who suggested that Optigen® II treatments might have provided sufficient N for rumen fermentation over an extended period. In contrast with this study and that of Ribeiro et al (2011), Wahrmund et al (2007 found no difference in DMI between the control, urea and Optigen® II treatments in a study that compared Optigen® II as a NPN source instead of urea in Bahia grass-fed animals. The apparent digestibility of DM, OM and NDF was not affected by the treatments, except for apparent N digestibility (P <0.05) ( Table 2).…”

Section: Resultssupporting

confidence: 87%

See 2 more Smart Citations

Effect of diets differing in rumen soluble nitrogen on utilization of poor-quality roughage by sheep

Mentz¹,

Niekerk²,

Hassen³

et al. 2016

SA J. An. Sci.

View full text Add to dashboard Cite

This study investigated the effects of replacing rapid-release nitrogen (N) from urea with a graded level of slow-release N (Optigen® II) source on intake, digestibility, rumen fermentation and microbial protein synthesis, when sheep were fed a poor-quality roughage diet. Five rumen cannulated wethers were used in a 5 x 5 Latin square experimental design. The treatments had various proportions of urea to Optigen® II (0 : 100, 25 : 75, 50 : 50, 75 : 25 and 100 : 0), with the same inclusion level of starch and a mineral premix on an iso-nitrogen basis. The 25% urea : 75% Optigen® II treatment showed significantly higher intakes of dry matter, organic matter, neutral detergent fibre and digestible organic matter than in the other treatments. No differences were recorded for apparent dry matter digestibility, organic matter digestibility and neutral detergent fibre digestibility among the treatments. However, sheep on the 100% Optigen® II treatment had a significantly lower apparent nitrogen digestibility. No differences were observed for ruminal pH and volatile fatty acid concentrations among the treatments, except for butyrate and isobutyrate concentrations. The butyrate concentration of the 100% Optigen® II treatment was significantly lower than the other treatments, whereas the isobutyrate concentration was significantly lower than in Treatments 2 (75% urea : 25% Optigen® II) and 5 (100% Optigen® II). The rumen NH 3 -N concentration of the 100% Optigen® II treatment was significantly lower than the 100% urea treatment at two and four hours after infusion. Based on biological responses, results suggest that up to 75% of urea could be replaced with Optigen® II in supplements.

show abstract

Section: Resultscontrasting

confidence: 99%

Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 87%

See 1 more Smart Citation

Effect of diets differing in rumen soluble nitrogen on utilization of poor-quality roughage by sheep

Mentz¹,

Niekerk²,

Hassen³

et al. 2016

SA J. An. Sci.

View full text Add to dashboard Cite

show abstract

“…Porém, informações relacionadas ao uso de combinações de diferentes fontes de NNP disponíveis (ureia pecuária, ureia extrusada e ureia revestida) para fornecimento a animais na fase de recria em pastagens diferidas ainda são incipientes. O fornecimento de fontes de NNP combinadas pode trazer benefícios, pois o processamento sofrido pela ureia para produção da ureia extrusada e ureia revestida pode diminuir a solubilidade da fonte, reduzir os riscos de intoxicações e aumentar a eficiência de utilização do pasto pelo animal (RIBEIRO et al, 2011 Para os cálculos de receita foram consideradas as informações de ganho diário, transformados em arrobas (Ganho de Carcaça (@/animal) = Ganho total x 0,52/15) e em seguida considerado o valor da arroba (Receita (R$/animal) = Ganho de Carcaça (@/animal) x R$ 122,00). Para o cálculo dos custos, foram considerados os valores investidos em cada suplemento (R$/saco e R$/kg) multiplicado pelo consumo total e diário por animal.…”

Section: Introductionunclassified

“…A ureia revestida apresentou menor solubilidade e concentração de nitrogênio amoniacal quando incubada em ambas as soluções (P>0,05). Estes resultados corroboram com Ribeiro et al (2011), que observaram menor solubilidade da ureia revestida em relação a ureia convencional ao avaliarem as fontes em suplementos para bovinos de corte alimentados com forragem de baixa qualidade. Diferentemente da ureia extrusada, cujo principio de processamento é o aquecimento, a ureia revestida é obtida pelo encapsulamento da ureia com Rev.…”

Section: Introductionunclassified

Combinações de fontes de nitrogênio não proteico em suplementos para novilhos Nelore em pastejo

Ítavo

Dias

et al. 2016

Rev. bras. saúde prod. anim.

View full text Add to dashboard Cite

RESUMO Objetivou-se avaliar fontes de nitrogênio não-proteico (NNP) combinadas para suplementação de novilhos Nelore na recria mantidos em pastagens diferidas. Após o deferimento de quatro piquetes de Brachiaria brizantha cv. MG4 por 60 dias (20 ha cada) 80 novilhos Nelore castrados, com peso corporal médio de 280,40±19,59kg, foram avaliados durante 120 dias. O manejo adotado foi pastejo rotacionado, com mudanças de piquetes a cada 15 dias. Foram avaliados quatro tratamentos com diferentes combinações de fontes de NNP: Ureia + Ureia extrusada + Ureia revestida; Ureia + Ureia revestida; Ureia + Ureia extrusada; Ureia extrusada. Em todos os tratamentos foram fornecidos suplemento proteico-energético-mineral ad libitum, com 30% de proteína bruta e 40% de nutrientes digestíveis totais.Quando avaliadas individualmente, as fontes de NNP apresentaram solubilidades distintas em água e solução tampão, sendo o menor valor observado para ureia revestida (P<0,05). Os animais dos tratamentos Ureia + Ureia extrusada + Ureia revestida e Ureia extrusa da apresentaram ganho médio diário superior (0,4kg/dia; P<0,05) aos animais dos tratamentos Ureia + Ureia extrusada (0,34kg/dia). Os animais do tratamento Ureia extrusada apresentaram maior ganho de carcaça (1,71 @/animal) em relação aos demais (P<0,05). A margem líquida do tratamento Ureia extrusada (R$ 158,20/animal) foi superior em 10,8%, 8,2% e 35,8% aos tratamentos Ureia + Ureia extrusada + Ureia revestida, Ureia + Ureia revestida e Ureia + Ureia extrusada, respectivamente. Recomenda-se a utilização de ureia extrusada como fonte de nitrogênio não proteico em suplementos para novilhos Nelore em pastagem diferida.

show abstract

Carnauba wax as a wall material for urea microencapsulation

Medeiros

Silva

et al. 2018

J Sci Food Agric

View full text Add to dashboard Cite

The production of urea microspheres using carnauba wax was successful for all microencapsulated systems developed, evidencing the promising potential for use in ruminant animal diets. The U 2 formulation with large particles is the most recommended because it permitted greater resistance to microbial attack, allowing a slower release of urea into the rumen, reducing the risk of intoxication or ruminal alkalosis. © 2018 Society of Chemical Industry.

show abstract

Effects of ruminal infusion of a slow-release polymer-coated urea or conventional urea on apparent nutrient digestibility, in situ degradability, and rumen parameters in cattle fed low-quality hay

Cited by 50 publications

References 19 publications

Effect of diets differing in rumen soluble nitrogen on utilization of poor-quality roughage by sheep

Effect of diets differing in rumen soluble nitrogen on utilization of poor-quality roughage by sheep

Combinações de fontes de nitrogênio não proteico em suplementos para novilhos Nelore em pastejo

Carnauba wax as a wall material for urea microencapsulation

Contact Info

Product

Resources

About