Uso de óxido de cromo como indicador da excreção fecal de bovinos em pastejo: variação das estimativas em função do horário de amostragem

Kozloski, Gilberto Vilmar; Netto, Diego Perez; Oliveira, L. Z.; Maixner, Adriano Rudi; Leite, Daniel Terra; Maccari, Marcieli; Brondani, Ivan Luiz; Sánchez, Luis Maria Bonnecarrère; Quadros, Fernando Luíz Ferreira de

doi:10.1590/s0103-84782006000200037

Cited by 25 publications

(21 citation statements)

References 3 publications

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“…Regarding the external markers, the fecal recovery of Cr 2 O 3 (92.5±6.6%) was higher, near 100%, result similar to the 86.1 obtained by Rodrigues et al (2010) in sheep also fed highconcentrate diets. Total fecal DM production can be estimated by the supply of Cr 2 O 3 once daily in the afternoon, associated with collection of two fecal samples (one in the morning and another in the afternoon), because there is no variation in the concentration of this marker in the feces of cattle in collections performed at different times (KOZLOSKI et al, 2006). This is in line with the results obtained in this study with sheep under similar conditions of administration of marker and fecal collection.…”

Section: Resultssupporting

confidence: 86%

“…The external makers were administered orally, simultaneously to the 20 animals, using a PVC tube, always at 14h (before each meal) (KOZLOSKI et al, 2006) and for the entire collection period (five days). Cr 2 O 3 and TiO 2 were administered in a single dose of 4 g/animal/day, preceded by a period of acclimatization of seven days; LIPE ® was supplied at 250 mg/animal/day, with two days for adaptation.…”

Section: Revmentioning

confidence: 99%

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Digestibility markers of sheep diets containing hydrolyzed sugarcane-top hay

Filho

Alves

Garcez

et al. 2017

Rev. bras. saúde prod. anim.

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SUMMARY This experiment evaluated the correlation between the estimates of fecal digestibility and dry matter digestibility (DMD) and nutrients obtained using internal (indigestibles dry materiDM, neutral detergent fiber-iNDF, acid detergent fiber-iADF and acid detergent ligniniADL) and external (chromium oxide-Cr2O3, titanium dioxide-TiO2, and purified and enriched lignin from eucalyptus-LIPE®) markers and the values obtained by the total feces collection method. Twenty uncastrated male sheep, with 29.64±5.53 kg average live weight; approximately 12 months old, were kept in metabolic cages and fed diets containing untreated sugarcane-top hay or sugarcane-top hay hydrolyzed with 3 and 6% urea or 1.5 and 3% calcium oxide (CaO). There was a positive correlation (P<.05) between the fecal production estimated by the markers and via total feces collection, with coefficients higher than 90% for iDM, Cr2O3, and TiO2. The DMD and nutrients estimated with the use of markers was positively correlated (P<.05) with that obtained by total feces collection. Coefficients of correlation for digestibility obtained by total collection were higher than those obtained with Cr2O3, but close to those obtained using TiO2. The coefficient of correlation between the digestibility of protein and fiber fraction estimated with iDM and iNDF and that obtained by total collection was higher than 70%. Internal marker iDM and external markers Cr2O3 and TiO2 are effective in estimating fecal production and DMD and nutrients.

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Section: Resultssupporting

confidence: 86%

Section: Revmentioning

confidence: 99%

Digestibility markers of sheep diets containing hydrolyzed sugarcane-top hay

Filho

Alves

Garcez

et al. 2017

Rev. bras. saúde prod. anim.

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“…The period for adaptation and collection of feces samples comprised 10 consecutive days. Cr 2 O 3 was provided orally, once a day (KOZLOSKI et al, 2006), in the morning to avoid thermal discomfort for the animals (7:30), together with a polyethylene external marker, with different colors for each animal to identify the feces. For ten consecutive days, animals were given 5g of Cr 2 O 3, and in the last three days the fecal samples were collected.…”

Section: Methodsmentioning

confidence: 99%

Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing

et al. 2015

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“…O estresse dos animais também pode ser reduzido com o fornecimento do indicador somente uma vez ao dia. Neste caso, os erros associados à flutuação diária da excreção do Cr 2 O 3 podem ser minimizados pela obtenção de várias amostras de fezes ao longo de um dia, ou durante vários dias, mas com coletas em horários alternados, de forma a obter-se uma amostra composta contendo sub-amostras a cada 3 ou 4 horas de um ciclo de 24 horas (Kozloski et al, 2006).…”

Section: Consumo Em Pastejounclassified

Suplementação a pasto: disponibilidade e qualidade x níveis de suplementação x desempenho

Silva¹,

Sá²,

Schio³

et al. 2009

R. Bras. Zootec.

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Grazing supplementation: availability and quality x supplementation levels x performance ABSTRACT -The objective was to evaluate the results of supplementation in the dry season of the year and the possible interference of the forage availability and quality and level of supplementation on performance. The total DM and green dry matter pasture availability deferred for use in the dry season has an average of all experiments of 6,431 kg ha -1 and 2,173 kg ha -1 . The Brachiaria under grazing in the dry season have high levels of NDF, with an average of 74.50%, high levels of ADF, with an average of 44.19%, low levels of CP, with average of 5.59% and low levels of IVDM/O, with an average of 51.36%. In this sense, the diet taken by the animal usually presents higher crude protein and lower levels of NDF. On consumption in grazing, note that the intake reduction is limited by until the level of supplementation of 0.3% of body weight (BW) per day and when the consumption of supplement increases to levels above 0.3% of BW, the consumption of grass is low and that this decrease may be even greater when the supply of supplement is 0.8% of the BW. Supplementation of cattle provided larger gains than those receiving only mineral in the dry season. Must be guaranteed at least 4,500 kg DM total.ha -1 , 1,200 kg.ha -1 of green dry matter, offering 10 to 12% of the BW offorage DM and 6% of DM potentially digestible to ensure selectivity and earnings satisfactory individual without compromising the gain per area. A supplementation in the dry season in Brachiaria is biologically feasible for positive effect on weight gain, but the economic viability of the system is location dependent. Supplementation levels above 0.8% of the BW should be investigated as alternatives that may avoid possible negative effects on the rumen environment to reduce the expectations of gain, as the fractionation of supplementation.

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Uso de óxido de cromo como indicador da excreção fecal de bovinos em pastejo: variação das estimativas em função do horário de amostragem

Abstract: RESUMO Foi avaliado o efeito dos horários de amostragem sobre as estimativas de excreção fecal, utilizando óxido de cromo como indicador externo, em três experimentos com bovinos em pastejo. Em todos os experimentos foi utilizada

Cited by 25 publications

References 3 publications

Digestibility markers of sheep diets containing hydrolyzed sugarcane-top hay

Digestibility markers of sheep diets containing hydrolyzed sugarcane-top hay

Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing

Suplementação a pasto: disponibilidade e qualidade x níveis de suplementação x desempenho

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