Comparação de Indicadores e Metodologia de Coleta para Estimativas de Produção Fecal e Fluxo de Digesta em Bovinos

Ítavo, Luís Carlos Vinhas; Filho, Sebastião de Campos Valadares; Silva, Fabyano Fonseca e; Valadares, Rilene Ferreira Diniz; Paulino, Mário Fonseca; Ítavo, Camila Celeste Brandão Ferreira; Moraes, Eduardo Henrique Bevitori Kling de

doi:10.1590/s1516-35982002000700027

Cited by 40 publications

(9 citation statements)

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“…The titanium dioxide (TiO 2 ) has been used as alternative to oxide chromic and suitable results have been obtained in assays with non-ruminant (Jagger et al, 1992;Short et al, 1996) and ruminant animals (Titgemeyer et al, 2001;Myers et al, 2006;Glindemann et al, 2009). This compound is usually present in some products for human feeding and has no limitation concerning its inclusion in animal food.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of fecal recovering and long term bias of internal and external markers in a digestion assay with cattle

et al. 2011

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-The objective of this work was to estimate the total recovering and the long term bias of the estimates of fecal excretion using the external markers chromic oxide and titanium dioxide and internal markers indigestible dry matter (iDM), indigestible neutral detergent fiber (iNDF) and indigestible acid detergent fiber (iADF) in a digestion assay with cattle fed different diets. Fourteen F1 Red Angus × Nellore averaging 12 months and 287 kg were used. The animals were fed with elephant grass silage, corn silage or signal grass hay and supplemented or not with 20% of concentrate. The experiment consisted of two 13-days experimental periods according to a 2 × 2 Latin square design with seven squares. The animals received 10 g/d of chromic oxide and titanium dioxide through esophageal sounder. There was no effect of forage, concentrate or their interaction on fecal recovering of external and internal markers. The average fecal recovering of chromic oxide and titanium dioxide were 99.50% and 101.95%, respectively. iDM, iNDF and iADF presented average fecal recovering of 99.02%, 98.87% and 102.07%, respectively. For all markers the fecal recovering was found to be 100% and all of them presented no long term bias. However, higher precision was observed for fecal excretion estimates obtained with internal markers. Todos os indicadores avaliados podem ser considerados isentos de vício de tempo longo. Contudo, maior precisão é verificada para as estimativas de excreção fecal obtidas com indicadores internos.Palavras-chave: dióxido de titânio, fibra em detergente ácido indigestível, fibra em detergente neutro indigestível, matéria seca indigestível, óxido crômico Revista Brasileira de Zootecnia

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Section: Introductionmentioning

confidence: 99%

Evaluation of fecal recovering and long term bias of internal and external markers in a digestion assay with cattle

et al. 2011

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“…The estimation of fecal marker content is frequently done by analyses of grab samples obtained from the rectum at one or two fixed sampling times a day (Detmann et al, 2001;Ítavo et al, 2002). However, it should be taken into account that probability of bias occurrence could be significant.…”

Section: Introductionmentioning

confidence: 99%

Fecal excretion patterns and short term bias of internal and external markers in a digestion assay with cattle

et al. 2011

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The objective of this work was to evaluate the fecal excretion profile and the short term bias of the external markers chromic oxide and titanium dioxide and the internal markers indigestible dry matter (iDM), indigestible neutral detergent fiber (iNDF) and indigestible acid detergent fiber (iADF) in a digestion trial with cattle fed different diets. Fourteen F1 Red Angus × Nellore bulls averaging 12 months old and 287 kg were kept in individual stalls. The animals were fed elephant grass silage, corn silage or signal grass hay, supplemented or not with 20% of concentrate mixture. The experiment consisted of two 13-day experimental periods according to a 2 × 2 Latin square design with seven squares grouping. The animals received 10 g of chromic oxide and 10 g of titanium dioxide through esophageal sounder daily. Fecal grab samples were obtained directly from the rectum of the animals at 1:30 a.m., 3:00 a.m., 4:30 a.m., 6:00 a.m., 7:30 a.m., 9:00 a.m., 10:30 a.m., 12:00 p.m., 1:30 p.m., 3:00 p.m., 4:30 p.m., 6:00 p.m., 7:30 p.m., 9:00 p.m., 10:30 p.m. and 12:00 a.m. There was no effect of forages or concentrate levels on the dimension of excretory cycle. The fundamental period of excretory cycle was 15.06 and 18.66 hours for chromic oxide and titanium dioxide, respectively and 9.93, 9.29 and 10.55 hours for iDM, iNDF and iADF, respectively. The oscillation range was higher for external markers. Considering the characteristics of all evaluated markers together, it is recommended fecal sampling designs with at least four collections, distributed during the day or only in the diurnal period for obtaining fecal excretion estimates free of short term bias.

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“…Utilizaram-se quatro tourinhos Santa Gertrudes de 380 kg de peso corporal e 17 meses de idade, canulados no rúmen, segundo técnica descrita por Leão & Coelho da Silva (1980). Os animais receberam os tratamentos necessá-rios no pré e pós-operatórios para garantia de plena recuperação e, após recuperação completa, foram alojados individualmente em baias de alvenaria de 16 m 2 , com cocho, bebedouro e saleiro exclusivos.…”

Section: Methodsunclassified

Degradabilidade in situ e parâmetros ruminais em bovinos alimentados com dietas balanceadas para diferentes ganhos de peso e potenciais de fermentação microbiana

et al. 2007

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Um experimento foi realizado com o objetivo de avaliar os parâmetros ruminais, a produção de ácidos graxos voláteis e a degradabilidade in situ em tourinhos Santa Gertrudes canulados no rúmen alimentados com dietas compostas de feno de capim-marandu e concentrado. Empregou-se o delineamento em quadrado latino 4 <FONT FACE=Symbol>´</FONT> 4, no qual os tratamentos foram compostos dos concentrados, ajustados para ganho de peso corporal (GPC) diário de 0,5 e 1 kg/animal e potencial de fermentação microbiana (y) de 9,5 e 11 g de proteína bruta microbiana/MJ energia metabolizável fermentável. Não foram encontradas interações significativas nem diferenças entre as dietas para pH, concentração molar dos ácidos acético e butírico e proporção molar dos ácidos acético, propiônico e butírico e relação acético:propiônico. Os teores de amônia diferiram entre os potenciais de fermentação microbiana, 14,67 e 20,83 mg/100 mL para baixo e alto, respectivamente, e a concentração molar de ácido propiônico foi diferente entre os potenciais de ganho de peso, 7,62 e 8,94 mM, respectivamente, para baixo e alto ganho de peso. Não foram detectadas diferenças entre dietas para as degradabilidades das frações do feno de capim-marandu e da soja em grão. Houve diferença no parâmetro "b" e na degradabilidade efetiva a 5%/hora da proteína bruta para os potencias de GPC do milho em grão moído. Para o farelo de soja, ocorreu interação significativa entre os potencias de GPC e de fermentação microbiana para alguns dos parâmetros da MS e PB, o mesmo observado para o farelo de algodão. As diferenças encontradas não justificaram o balanceamento dos concentrados para os diferentes potenciais de produção avaliados.

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Comparação de Indicadores e Metodologia de Coleta para Estimativas de Produção Fecal e Fluxo de Digesta em Bovinos

Cited by 40 publications

References 9 publications

Evaluation of fecal recovering and long term bias of internal and external markers in a digestion assay with cattle

Evaluation of fecal recovering and long term bias of internal and external markers in a digestion assay with cattle

Fecal excretion patterns and short term bias of internal and external markers in a digestion assay with cattle

Degradabilidade in situ e parâmetros ruminais em bovinos alimentados com dietas balanceadas para diferentes ganhos de peso e potenciais de fermentação microbiana

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