Diet, marker and fecal sampling method interactions with internal and external marker pairs when estimating dry matter intake in beef cattle

Velasquez, Alejandro Vargas; Oliveira, Chiara Albano de Araújo; Martins, Cristian Marlon de Magalhães Rodrigues; Balieiro, J. C. C.; Silva, Luis F.P.; Fukushima, Romualdo Shigueo; Sousa, Dannylo Oliveira de

doi:10.1016/j.livsci.2021.104730

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Velazquez et al . (2021), for example, reported increased RR of iNDF in trials with Nelore bulls fed grass hay compared to those fed corn silage based diets and, in the study of Krizsan and Huhtanen (2013), the iNDF content in feed samples incubated in situ increased at an increased proportion of concentrate in diet of rumen fistulated cows. Moreover, in dairy cows fed diet with low but not in those fed diet with adequate crude protein (CP) content, the faecal output was overestimated and digestibility underestimated when iNDF was used as a marker (Lee and Hristov, 2013).…”

Section: Discussionmentioning

confidence: 99%

Relationship between intake and faecal excretion of indigestible fractions in trials with sheep: impact of the method of analysis, diet and trial

et al. 2022

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A data set of individual observations was compiled from 17 digestibility trials with sheep with the aim of evaluating the impact of the method of analysis and, within each method, the effect of dietary fibre content and trial on the faecal recovery rate (RR) of indigestible dry matter (iDM) and indigestible neutral detergent fibre (iNDF). Markers concentration in samples of diet and faeces were determined either in polyester filter bags of 40 μm of porosity incubated in situ for 144 h (method A; n = 257) or in bags of 16 μm of porosity incubated in situ for 288 h (method B; n = 321). Regardless of the incubation method, the intake of either iDM or iNDF was linearly (P < 0.05) related to the amount excreted in faeces and, for all linear relationships, the slopes were lower than 1 (i.e. between 0.53 and 0.71). Within both methods, the RR of both markers linearly decreased at increased NDF content in diet (P < 0.05). The root mean square error of the linear relationships varied from 0.147 to 0.189 which represented from 19% to 24% of the respective average RR of markers. In conclusion, regardless of the incubation method, the RR of both markers showed high individual variability and, thus, the use of average RR values obtained in controlled digestibility trials as an index to correct the individual digestibility values obtained with either marker in field trials has the potential to improve the accuracy but not the precision of the digestibility estimates.

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Section: Discussionmentioning

confidence: 99%

Relationship between intake and faecal excretion of indigestible fractions in trials with sheep: impact of the method of analysis, diet and trial

et al. 2022

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“…After the lactation trial, all goats were taken for three successive days to perform a digestion trial using the bag technique (Uehara et al 2015 ; Kotz et al 2021 ; Velásquez et al 2021 ). Fecal bags were fixed on goats 2 days before starting digestion trial for adaptation.…”

Section: Digestion Trialmentioning

confidence: 99%

Impact of natural betaine supplementation on rumen fermentation and productive performance of lactating Damascus goats

Ghoneem

El-Tanany

2023

Trop Anim Health Prod

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Two natural betaine sources; dehydrated condensed molasses fermentation solubles (Bet1) and Betafin®, a commercial anhydrous betaine extracted from sugar beet molasses and vinasses (Bet2); were used to investigate their impact on rumen fermentation parameters and lactation performance of lactating goats. Thirty-three lactating Damascus goats, with an average weight of 37 ± 0.7 kg and their age ranged from 22 to 30 months (2nd and 3rd lactation season), were divided into three groups, each group contained 11 animals. The control group (CON) was fed ration without betaine. While the other experimental groups were fed a control ration supplemented either with Bet1 or Bet2 to provide a 4 g betaine/kg diet. Results confirmed that betaine supplementation improved nutrient digestibility and nutritive value, and increased milk production and milk fat contents with both Bet1 and Bet2. Significant increases in concentration of ruminal acetate were observed in betaine-supplemented groups. Goats fed dietary betaine non-significantly recorded higher concentrations of short and medium-chain fatty acids (C4:0 to C12:0), and significant lower concentrations of C14:0 and C16:0 in milk. Also, both Bet1 and Bet2 non-significantly decreased the blood concentrations of cholesterol and triglycerides. Therefore, it could be concluded that betaine can improve the lactation performance of lactating goats and produce healthy milk with beneficial characteristics.

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Use of near-infrared reflectance spectroscopy on feces to estimate digestibility and dry matter intake of dietary nutritional characteristics under grazing conditions in Colombian creole steers

Parra-Forero

Valencia-Echavarría

Vargas

et al. 2023

Trop Anim Health Prod

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Diet, marker and fecal sampling method interactions with internal and external marker pairs when estimating dry matter intake in beef cattle

Cited by 6 publications

References 27 publications

Relationship between intake and faecal excretion of indigestible fractions in trials with sheep: impact of the method of analysis, diet and trial

Relationship between intake and faecal excretion of indigestible fractions in trials with sheep: impact of the method of analysis, diet and trial

Impact of natural betaine supplementation on rumen fermentation and productive performance of lactating Damascus goats

Use of near-infrared reflectance spectroscopy on feces to estimate digestibility and dry matter intake of dietary nutritional characteristics under grazing conditions in Colombian creole steers

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