Evaluation of indirect methods to estimate the nutritional value of tropical feeds for ruminants

Magalhães, Karla Alves; Filho, Sebastião de Campos Valadares; Detmann, Edênio; Diniz, L.L.; Piña, D. S.; Azevêdo, José Augusto Gomes; Araújo, Fabiana Lana de; Marcondes, Marcos Inácio; Fonseca, Mozart Alves; Tedeschi, L. O.

doi:10.1016/j.anifeedsci.2009.10.004

Cited by 20 publications

(37 citation statements)

References 30 publications

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“…This pattern corroborates the results obtained by Detmann et al (2008b) and Magalhães et al (2010), who observed that the single-compartment sub-model estimates the adCP with less efficiency under tropical conditions in comparison with the interpretation of the digestive process of the CP in the two-compartmental form.…”

Section: Resultssupporting

confidence: 81%

Evaluation of models for prediction of the energy value of diets for growing cattle from the chemical composition of feeds

et al. 2012

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-The objective of this study was to estimate and evaluate the contents of apparently digestible fractions of crude protein, ether extract and non-fibrous carbohydrates, the digestible fraction of the neutral detergent fiber and the content of total digestible nutrients (TDN) from the chemical composition of feeds in growing cattle fed different diets. Fourteen F1 Red Angus × Nellore young bulls with average age and weight of 12 months and 287±36 kg were used. Animals were fed elephant grass silage, corn silage or signal grass hay, with or without supplementation of 200 g concentrate per kg of the total diet. The experiment consisted of two 13-days periods, in which the concentrate supplementation was crossed over animals. The values of digestible fractions and the TDN content observed were obtained based on total collection of feces. Several sub-models applied to the different digestible fractions were assessed and discussed. Estimates of the TDN content in the diet were produced from the combination of sub-models applied to the individual digestible fractions. The TDN content was more efficiently predicted from the sub-models proposed by Detmann et al. (2010) when biological procedures for the estimation of the undegradable fraction of the protein and the potentially degradable fraction of the neutral detergent fiber were considered.

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Section: Resultssupporting

confidence: 81%

Evaluation of models for prediction of the energy value of diets for growing cattle from the chemical composition of feeds

et al. 2012

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“…Corn contained the highest NFC among the forages, which could be due to the accumulation of starch in the ear part. Several papers showed higher NFC contents in whole crop corn (18%-40%DM) than that found in the present study ( Johnson et al, 2003;Magalhães et al, 2010;Samiei e al., 2015). This difference could have been caused by the amounts of grains and their maturity.…”

Section: Advances In Animal and Veterinary Sciencescontrasting

confidence: 54%

“…10%-15% DM) (Kozloski et al, 2007;Magalhães et al, 2010). Among the grasses investigated, Gamba grass, Signal grass, and Jarra grass contained relatively higher NFC.…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

Nutrient Contents and In vitro Ruminal Fermentation of Tropical Grasses Harvested in Wet Season in the Philippines

Kondo¹,

Yoshida²,

Loresco³

et al. 2015

Adv. Anim. Vet. Sci.

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| In tropical countries, perennial grasses are the key feed resources for ruminants; grasses having high nutritional characteristics are important for maintaining the productivity and health of animals. In this study, the nutrient composition and in vitro ruminal degradation characteristics as well as the short-chain fatty acid (SCFA) production of 7 grasses grown over short cutting intervals were compared with those of corn and rice straw. Grasses were harvested at 35 -39 days after regrowth in the wet season in Laguna, Philippines. Crude protein (CP) contents were not remarkably different among the grasses (from 9 to 11% in a dry matter (DM) basis, p>0.05). Neutral detergent fiber (NDF) contents varied from 63% to 73% DM (p<0.05); the lowest was found in Napier grass (Pennisetum purpureum) and the highest in Para grass (Brachiaria mutica). Non-fiber carbohydrate (NFC) content was the highest in corn, followed by Jarra grass (Digitaria milanjiana) and Gamba grass (Andropogon gayanus) (p<0.05). The in vitro NDF degradability was also the highest in corn, followed by that in Jarra grass and Guinea grass (Panicum maximum) (p<0.05). SCFA production and gas production was the highest in corn, followed by Jarra grass, Guinea grass, and Signal grass (Brachiaria decumbens), and the lowest in rice straw (p<0.05). These findings suggested that the nutritional characteristics, particularly NFC and NDF contents, and rumen degradation varied across grasses harvested at short cutting intervals. Among the grasses investigated in this study, Jarra grass and Guinea grass contained potentially high nutritive value due to the highest rumen fermentation characteristics. Keywords

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“…Incubations were carried out in calibrated glass syringes with a capacity of 100 mL (HÄBERLE Labortechnik -FORTUNA ® Germany) and maintained at a temperature of 39 °C, in agitation (70 rpm), for 48 hours (Magalhães et al, 2010). At 0, 1, 2, 4, 6, 8 12, 24, 32 m and 48 hours, readings of the volume of gas produced in the incubation were taken (Magalhães et al, 2010).…”

Section: Methodsmentioning

confidence: 99%

“…At 0, 1, 2, 4, 6, 8 12, 24, 32 m and 48 hours, readings of the volume of gas produced in the incubation were taken (Magalhães et al, 2010).…”

Section: Methodsmentioning

confidence: 99%

Evaluation of whey fermented by Enterococcus faecium in consortium with Veilonella parvula in ruminant feeding

et al. 2012

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-The objective of this study was to evaluate the whey fermented by Enterococcus faecium in consortium with Veilonella parvula on the in vitro growth of ruminal bacteria and as a supplement in the cattle diet. In the in vitro experiment, a randomized design, with the following combinations was used: ruminal bacteria; ruminal bacteria and inactive whey; ruminal bacteria and active whey; and active whey. In the in vivo experiment, five fistulated Zebu Holstein-Zebu crossbred heifers were distributed in a 5 × 5 Latin square. Supplements were formulated without the addition of whey, with the addition of two levels of unfermented whey (2.5 and 5 L/day) or two levels of fermented whey (2.5 and 5 L/day). A positive effect of the whey fermentation was detected on the consumption of dry matter, organic matter, crude protein, ether extract, nonfiber carbohydrates and neutral detergent fiber, corrected for ash and protein in kg/day. No effects of whey were observed on the pH and concentration of rumen ammonia nitrogen, serum concentration of urea and glucose, urinary excretion of urea or nutrient digestibility, except for the total digestible nutrients. Supplementation with whey improved the apparent nitrogen balance, but supplementation with fermented whey decreased the intestinal flow of microbial nitrogen and microbial synthesis efficiency in relation to the unfermented whey. The whey fermentation process does not optimize the physiological responses of heifers supplemented with 2.5 and 5.0 L of whey.

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Evaluation of indirect methods to estimate the nutritional value of tropical feeds for ruminants

Cited by 20 publications

References 30 publications

Evaluation of models for prediction of the energy value of diets for growing cattle from the chemical composition of feeds

Evaluation of models for prediction of the energy value of diets for growing cattle from the chemical composition of feeds

Nutrient Contents and In vitro Ruminal Fermentation of Tropical Grasses Harvested in Wet Season in the Philippines

Evaluation of whey fermented by Enterococcus faecium in consortium with Veilonella parvula in ruminant feeding

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