Inovações e desafios na avaliação de alimentos na nutrição de ruminantes

Canesin, Roberta Carrilho; Fiorentini, Giovani; Berchielli, Telma Teresinha

doi:10.1590/s1519-99402012000400009

Cited by 15 publications

(11 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For all cases, the average fecal output values estimated within digestibility trials with this marker are close to the reference values reported by different researchers for the forage evaluated under similar grazing conditions, which range between 3.30 and 4.70 kg DM day -1 (Ramírez & Giraldo, 2017), indicating that the implementation of the colorimetric method for the estimation of FO under grazing in supplemented animals turns out to be satisfactory. Although it has been found in studies of comparative evaluation of markers that with Cr2O3 intake overestimation occurs, this problem is often attributed to the traditional analytical technique (Canesin, Fiorentini, & Berchielli, 2012) or other factors related with the internal markers (Guzman et al, 2017), so optimization of this method constitutes an important advantage for the use of the technique in digestibility tests.…”

Section: Resultsmentioning

confidence: 99%

Colorimetric method as alternative to chromium (III) quantification in cattle feces

Ospina

Zapata

González

et al. 2020

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

One of the main factors to establish productivity of grazing cattle is the estimation of forage intake. For this, the most widely used technique is based on the estimation of fecal output using chromium dioxide as external marker. However, quantification can be expensive and sometimes not precise due to the methodology used for this purpose. Therefore, the aim of this study was to validate the colorimetric method for chromium quantification and to implement it in the estimation of fecal output in grazing cattle. The temperature, the digestion time and the wavelength for the measurement were evaluated. The method was validated for selectivity, linearity, detection and quantification limits, precision, accuracy, and stability. Results showed that temperature and digestion time are critical to improve sensitivity and quantification limits. The validation demonstrated that the method is suitable for the quantification of Cr2O3 in a wide range of concentrations, being statistically comparable with a reference method, and offering a reliable low cost and easy to implement alternative, to estimate fecal output in bovine digestibility studies.

show abstract

Section: Resultsmentioning

confidence: 99%

Colorimetric method as alternative to chromium (III) quantification in cattle feces

Ospina

Zapata

González

et al. 2020

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…The use of iDM as a marker for the estimate of digestibility has been common in research with ruminants, and different effects have been observed, e.g., Torres et al (2009), who obtained efficient estimates with iDM incubated for 144 h (61.24%) as compared with those obtained by total feces collection (58.99%). According to Canesin et al (2012), when internal markers are incubated for a shorter time, especially iDM, iNDF and iADF, they do not reproduce the indigestible fraction of the feed and consequently the digestibility of DM and nutrients, thus requiring longer incubation times. The recommended incubation time is 240 to 264 h, with 2-mm particles.…”

Section: Resultsmentioning

confidence: 99%

Digestibility markers of sheep diets containing hydrolyzed sugarcane-top hay

Filho

Alves

Garcez

et al. 2017

Rev. bras. saúde prod. anim.

View full text Add to dashboard Cite

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.

show abstract

“…Este último factor se consideró en el estudio, y se constató en la caracterización química del suelo que la no presencia del mineral no constituyera una limitante, sin embargo, las variaciones de pH sí pudieron constituir barreras para la absorción del fósforo (Ledea et al, 2017). En este sentido Anesin et al (2012) refirieron que, si los rangos de acidez del suelo estuvieron por encima de 5,5-6,5, se puede afectar el proceso de absorción de minerales por parte del sistema radical de la planta al presentarse como (PO 4 ) 2 Ca 3, y de esta forma no puede ser asimilado. En el suelo del área experimental en las profundidades de 0-60 cm, las variaciones del pH se encuentran entre 6,9-7,1, condición que pudo intervenir como limitante en el comportamiento del fósforo en la solución del suelo (Ledea et al, 2017)…”

Section: Edad De Rebroteunclassified

Caracterización química de nuevas variedades de Cenchrus purpureus tolerantes a la sequía

et al. 2018

View full text Add to dashboard Cite

Climate change has modified the behavior of climate variables, for this reason, pastures manifest a seasonal productive behavior, where the deposition of structural carbohydrates is modified and in some cases the absorption of minerals. The objective of this study was to characterize, in varieties of Cenchrus purpureus tolerant to drought, the chemical composition of leaves and stems at different ages of regrowth in conditions of intense seasonal drought. The experimental period covered the years 2013 to 2015, in the Experimental Station of Pastures and Forages of the Institute of Agricultural Research “Jorge Dimitrov”. In a completely randomized design with the factorial arrangement was used, and the dynamics of the chemical composition of leaves and stems of new varieties of C. purpureus were characterized, in different ages of regrowth and different climatic periods (rainy and not very rainy), and their combination (4 x 3 x 2). The interaction age of regrowth with climatic station affected the chemical composition of the leaves (p≤0.001), altering the content of cellulose (Cel), hemicellulose (Hcel), neutral detergent fiber (NDF), acid detergent fiber (ADF), cellular content (CC), calcium (Ca) and silica (Si), while in the stems this interaction only affected the concentration of ADF. The isolated effect of the climatic season modified in leaves (p≤0.01) the content of phosphorus (P) and lignin (Lig), it stems the P content (p≤0.001). When the regrowth age varied, there was a modification of the chemical composition of the leaves (crude protein and Lig) and stems (crude protein). The new varieties of C. purpureus under conditions of degradation and intense seasonal drought showed a pattern of chemical behavior similar to that of tropical grasses, but with low contents of protein and phosphorus.

show abstract

Inovações e desafios na avaliação de alimentos na nutrição de ruminantes

Abstract: Rev. Bras. Saúde Prod. Anim., Salvador, v.13, n.4, p.938-953 out./dez., 2012 http://www.rbspa.ufba.br ISSN 1519 9940

Cited by 15 publications

References 43 publications

Colorimetric method as alternative to chromium (III) quantification in cattle feces

Colorimetric method as alternative to chromium (III) quantification in cattle feces

Digestibility markers of sheep diets containing hydrolyzed sugarcane-top hay

Caracterización química de nuevas variedades de Cenchrus purpureus tolerantes a la sequía

Contact Info

Product

Resources

About