Rumen degradability and intestinal digestibility of brewers' grains as affected by origin and heat treatment and of barley rootlets

Pereira, José Carlos; Carro, M. D.; González, Javier; Alvir, M. R.; Rodríguez, Carlos Alberto

doi:10.1016/s0377-8401(98)00168-0

Cited by 44 publications

(45 citation statements)

References 22 publications

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“…The lower effective CP degradability of both GM hp and GM hx demonstrated that the chemical and physical changes produced by heat and heat-xylose processing increased the proportion of intermediate and slowly degradable fractions of nitrogen (Table 2) which confirmed the results of previous workers (Broderick and Craig, 1980;Pereira et al, 1998;Tunce and Sacakli, 2003). Heat and heat-xylose processing, which stimulate Maillard reaction between aldehydes group of reducing sugars and free amino group (Martins et al, 2001), might increase resistance of the GM hx protein to ruminal degradation.…”

Section: Discussionsupporting

confidence: 87%

“…Furthermore, the formation of soluble phenolic compounds which have a depressing effect on ruminal DM degradation might be the other alternative (Lopez et al, 1995). Present results indicate that heat and heat-xylose processing caused to decrease the amount of material available to rumen microbes and this confirmed the findings of Pereira et al (1998). In addition, results obtained by the present experiment confirmed the previous results suggesting that reducing sugars had a potential to alter ruminal degradability of protein sources such as soybean and canola meals (McAlister et al, 1993;Stanford et al, 1995;Tuncer and Sacakli, 2003;Rooke, 1985).…”

Section: Discussionsupporting

confidence: 84%

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The Effect of Heat or Heat-Xylose Processing on Nitrogen Fractions and in Situ/In Vitro Ruminal and Post-Ruminal Protein Disappearance of Guar Meal

Jahani-Azizabadi¹

2010

American Journal of Animal and Veterinary Sciences

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Problem statement: Guar meal is a by-product consisting of hull and germ and is mostly used as a protein source in poultry and ruminant rations. The aim was to determine the effect of heat or heat-xylose processing on nitrogen fractions, in situ ruminal degradation parameters and in situ/in vitro ruminal and post-ruminal disappearance of guar meal. Approach: Samples were intact Guar Meal (GM), heat processed GM (GM hp , GM was heated at 100°C for 45 minute using industrial heater) and heat-xylose processed GM (GM hx , xylose was included in GM to give a final concentration of 10 g kg −1 DM, then was heat processed at 100°C for 45 minute using industrial heater N). Acid detergents insoluble nitrogen concentration of both GM and GMhp was significantly lower than that of GM hx (10.3, 11.29 and 18.53 g kg −1 nitrogen, respectively). In situ fractional degradation rate constant (c) of DM and CP was significantly decreased as a result of heat-xylose processing.Effective crude protein degradability of GM hp and GM hx was higher than that of GM. Post-ruminal disappearance of ruminal-undegradable CP of GM hx (0.965) was significantly higher compared with GM and GM hp (0.918 and 0.906, respectively). Conclusion: Results of the present study demonstrated that heat and heat-xylose processing might effectively protect the DM and CP of guar meal from ruminal degradation.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 84%

The Effect of Heat or Heat-Xylose Processing on Nitrogen Fractions and in Situ/In Vitro Ruminal and Post-Ruminal Protein Disappearance of Guar Meal

Jahani-Azizabadi¹

2010

American Journal of Animal and Veterinary Sciences

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“…However, in our work, dehydration only led to a moderate reduction of ED (6.1%). No other effects of this reduction should be expected on the feed nitrogen value since different studies carried out with different feeds [10,13] indicate that heat treatments yielding no heat damage, improve the content of by-pass protein without impairing intestinal digestibility of this fraction, in spite of the increased nitrogen fibrebound contents of the feeds.…”

Section: Discussionmentioning

confidence: 99%

Effect of dehydration on ruminal degradability of lucerne

2000

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-The effects of industrial dehydration and a subsequent compression at high pressures on rumen degradability of lucerne were determined in 3 samples obtained at harvest or after the process of dehydration and compression of this forage. Rumen degradability of dry matter (DM) and nitrogen (N) was determined by the nylon bag technique in 3 ruminally cannulated wethers. Dehydration reduced effective DM degradability (from 63.4 to 59.4%), which was associated with an increase of both the rumen undegradable fraction (from 30.5 to 33.4%) and the lignin content (from 65.7 to 77.9 g . kg -1 of DM). Effective degradability of N was also reduced by dehydration (from 82.7 to 77.7%), mainly by a decrease in the degradation rate (from 30.8 to 12.4% . h -1 ). The compression process produced a small but significant increase of the solubility of both DM and N, which did not alter the values of effective degradability.lucerne / dehydration / high pressure compression / rumen degradability Résumé -Effet de la déshydratation sur la dégradabilité dans le rumen de la luzerne. Nous avons étudié les effets de la déshydratation industrielle suivie d'une procédure de compression à haute pression en utilisant 3 échantillons de luzerne récoltés soit à la fauche soit après des procedés de déshydratation et de compression du fourrage. La dégradabilité de la matière sèche (MS) et de l'azote a été déterminée par la technique des sachets de nylon sur 3 moutons portant des canules du rumen. La déshydratation a produit une diminution de la dégradabilité de la MS (de 63,4 à 59,4 %), qui a été associée à une augmentation de la fraction non dégradable (de 30,5 à 33,4 %) et de la teneur en lignine (de 65,7 à 77,9 g . kg -1 de MS). Pour l'azote, la dégradabilité a été aussi réduite par la déshy-dratation (de 82,7 à 77,7 %), principalement par la chute de la vitesse de dégradation (de 30,8 à 12,4 % . h -1 ). L'emballage à haute pression a produit une augmentation modérée, mais significative, de la solubilité de la MS et de l'azote, qui, cependant, n'a pas d'effet sur la dégradabilité. luzerne / déshydratation / emballage à haute pression / dégradabilité du rumen

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“…Insoluble N in neutral detergent (NDIN) and in acid detergent (ADIN) solutions were determined by Kjeldahl analysis of the NDF and ADF residues, respectively. The solubility of CP (CPS) was determined in triplicate in McDougall buffer for 6 h as previously described by Pereira et al [13]. The samples of faeces were thawed, dried, ashed (600 °C for 6 h) and then wetdigested with a solution of 1.5 M HNO 3 and KCl (3.81 g⋅L -1 ) for the determination of concentrations of Yb and Eu using, respectively, atomic absorption spectrometry and atomic emission spectrometry (Smith Hieftfe 22, thermo Jarrell Ash, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

Rumen degradability of dehydrated beet pulp and dehydrated citrus pulp

Pereira

González

2004

Anim. Res.

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-The rumen degradation of dry matter (DM) and crude protein (CP) of 10 samples of dehydrated beet pulp (DBP) and 2 samples of dehydrated citrus pulp (DCP) were studied in three rumen cannulated wethers using nylon bag and rumen outflow rate techniques. The animals were fed with a mixed diet of prairie hay and concentrate (2:1 on DM) at an intake level of 40 g DM⋅kg BW -0.75 . The effective degradability (ED) values of all feeds of each group were estimated from the rumen outflow rate determined on a sample of each kind of pulp; no significant differences (P > 0.05) were observed between these values (4.66 and 3.52%⋅h -1 , for DBP and DCP, respectively). The samples of DBP showed a great variability for the chemical composition as well as for both DM and CP degradation. Thus, the ED values of DM ranged from 41.0 to 70.8% and those of CP from 34.3 to 73.1%. Both values were correlated (r = 0.874; P < 0.001). A good prediction of the ED of DM (R 2 = 0.933) was obtained from the contents of neutral detergent fibre and acid detergent fibre as the first and second predictive variables. In the same manner, the best prediction (R 2 = 0.954) of the ED of CP was derived from the concentrations of CP and neutral detergent fibre. For DCP samples, mean values of ED of DM and CP were 81.0 and 74.2%, respectively. The equation obtained from DBP to predict the ED of DM also allowed a close prediction in these last samples, which seems to indicate that DM degradation is conditioned by the same factors in both kinds of pulps. On the contrary, this fact was not observed for CP degradation. dehydrated beet pulp / dehydrated citrus pulp / chemical composition / rumen degradability Résumé -Dégradabilité ruminale des pulpes déshydratées de betterave et d'agrumes. La dégradation dans le rumen de la matière sèche (MS) et des matières azotées totales (MAT) de 10 échantillons de pulpe de betterave déshydratée (PBD) et de 2 échantillons de pulpe d'agrumes déshydratée (PAD) a été mesurée sur trois béliers, porteurs de canules du rumen, par la méthode des sachets de nylon couplée à la technique de passage des particules hors du rumen. Les animaux ont été nourris avec une ration mixte de foin de prairie et concentré (2:1 sur MS) distribuée à 40 g MS⋅kg P -0,75 . La dégradabilité théorique (DT) pour tous les échantillons de chaque groupe a été calculée avec les taux de sortie du rumen déterminés pour un échantillon de chaque genre de pulpe. Ces valeurs n'ont pas été différentes (4,66 et 3,52 %⋅h -1 , pour PBD et PAD, respectivement ; P > 0,05). Les * Present address: Departamento de Zootécnia, UFV, Viçosa, Brazil. ** Corresponding author: jgonzalez@pan.etsia.upm.es 100 J.C. Pereira, J. González échantillons de PBD ont montré une importante variabilité, tant pour la composition chimique que pour la dégradation de la MS ou des MAT. Les valeurs de DT ont varié de 41,0 à 70,8 % pour la MS et de 34,3 à 73,1 % pour les MAT. Par ailleurs, les deux valeurs ont été étroitement corrélées (r = 0,874 ; P < 0,001). La meilleure prédiction de la DT...

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Rumen degradability and intestinal digestibility of brewers' grains as affected by origin and heat treatment and of barley rootlets

Cited by 44 publications

References 22 publications

The Effect of Heat or Heat-Xylose Processing on Nitrogen Fractions and <I>in Situ</I>/<i>In Vitro</i> Ruminal and Post-Ruminal Protein Disappearance of Guar Meal

The Effect of Heat or Heat-Xylose Processing on Nitrogen Fractions and <I>in Situ</I>/<i>In Vitro</i> Ruminal and Post-Ruminal Protein Disappearance of Guar Meal

Effect of dehydration on ruminal degradability of lucerne

Rumen degradability of dehydrated beet pulp and dehydrated citrus pulp

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