Effect of Ruminal Degradability of Crude Protein and Nonstructural Carbohydrates on the Efficiency of Bacterial Crude Protein Synthesis and Amino Acid Flow to the Abomasum of Dairy Cows

Mabjeesh, S.J.; Arieli, A.; Bruckental, I.; Zamwell, S.; Tagari, H.

doi:10.3168/jds.s0022-0302(97)76260-x

Cited by 27 publications

(32 citation statements)

References 32 publications

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“…(1993) reported that synchronicity had little effect on the microbial efficiency and synthesis, while Kolver et al . (1998) and Mabjeesh et al . (1997) reported no significant effect on MBN yield, and Henderson et al .…”

Section: Discussionmentioning

confidence: 96%

Adaptive changes in microbial synthesis and nitrogen balance with progressing dietary feeding periods in sheep fed diets differing in their ruminal degradation synchronicity between nitrogen and organic matter

Ichinohe

Fujihara

2008

Animal Science Journal

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Two diets differing in their degrees of ruminal degradation synchronicity between nitrogen (N) and organic matter (OM) were fed to six adult rams at a maintenance level for three months in a two‐way layout design combining a randomized block design. Adaptive changes in microbial N (MBN) supply and N balance were investigated for both diets. The in situ rumen degradation parameters of OM and N were determined for four feeds and subsequently were used to formulate the two diets to have different ruminal degradation synchronicity and to be identical with metabolizable energy (ME), metabolizable protein (MP) and ruminally degradable N concentrations. The animals were divided into two groups and fed asynchronous (ASYNC) or synchronous (SYNC) diet, respectively. On days 30, 60 and 90 of each feeding period, a five‐day metabolism trial was carried out. Animals consumed their diets thoroughly and did not show marked body weight change during the observation. The apparent digestibility of OM and N did not differ significantly between the diets throughout the periods. The MBN supply was significantly greater for ASYNC than that for SYNC (P < 0.01) and was greater on days 60 and 90 than that on day 30 (P < 0.05). Neither diets nor periods had a significant effect on the efficiency of MBN synthesis. There was a significant period effect on N retention (P < 0.05) together with tendency of diet × period interactions (P = 0.1). There was no significant dietary effect. An improvement in N retention with advancing feeding period was observed for both diets. The plasma urea concentration decreased with feeding period (P < 0.01) and there was a concomitant decrease in urinary N excretion. Plasma glucose concentration tended to increase (P = 0.07). The results suggest that lengthening feeding duration from 30 days might have caused ameliorative changes in the utilization of ME and MP, and may have improved microbe synthesis irrespective of the degradation synchronicity.

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Section: Discussionmentioning

confidence: 96%

Adaptive changes in microbial synthesis and nitrogen balance with progressing dietary feeding periods in sheep fed diets differing in their ruminal degradation synchronicity between nitrogen and organic matter

Ichinohe

Fujihara

2008

Animal Science Journal

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“…Finely ground maize (64) fed once a day Steam-flaked maize (64) fed once a day Finely ground maize (64) fed four times a day Steam-flaked maize (64) fed four times a day [69] Maize silage + alfalfa silage High-moisture corn (56) …”

Section: /55mentioning

confidence: 99%

“…Although the importance of balancing the supply of RDP to the availability of fermentable energy on a daily basis is well recognised [14,56], other workers have suggested that it may be important to optimise the diurnal patterns of supply of RDP and fermentable energy (the 'synchrony concept') [42,47].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effects of synchronising the availability of N and energy on rumen function and production responses of dairy cows – a review

et al. 2006

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-This paper reviews the effects of synchronising the availability of N and energy on rumen function and production responses of lactating dairy cows. The paper makes a key distinction between altering the synchronicity of diets by changing dietary ingredients, or by altering the feeding frequency or the feeding patterns. Manipulating synchrony by changing dietary ingredients presents some problems, since it is not possible to discount the possibility that apparent effects of synchrony are associated with the manipulation of the ingredients (level and type) themselves. These problems can be overcome, at least partially, by altering the feeding patterns. This review shows that the evidence for the benefits of synchronising energy and N supply to the rumen is contradictory, both for efficient microbial protein synthesis and for maximising milk production responses. dairy cow / energy / nitrogen / rumen / synchrony Résumé -Effets de la synchronisation de la disponibilité en azote et en énergie sur la fonction ruminale et les performances de production des vaches laitières -revue. Cet article passe en revue les effets d'une synchronisation entre les disponibilités en azote et en énergie sur la fonction ruminale et les performances de production des vaches laitières. Une distinction importante est faite entre les effets d'une synchronisation obtenue en changeant les ingrédients de la ration, et celle obtenue en modifiant le schéma et la fréquence d'apport d'aliment. La première solution conduit à des difficultés d'interprétation, car il devient impossible de distinguer les effets de la synchronisation de ceux dus à la nature et au niveau des ingrédients utilisés. La deuxième solution permet, au moins

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“…With high levels of concentrates in diets, efficiency of microbial crude protein synthesis in the rumen is lower than in wellbalanced roughage-based diets. However, diets higher in nonstructural carbohydrates such as starch normally cause a decrease in microbial growth efficiency due to a decreased rumen pH and a slowed rumen passage rate (9).…”

Section: Introductionmentioning

confidence: 99%

In vitro gas production of five rations of different maize silage and concentrate ratios influenced by increasing levels of chemically characterized extract of Salix babylonica

Elghandour¹,

Kholif²,

Zaragoza-Bastida³

et al. 2015

Turk J Vet Anim Sci

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This study was carried out to assess the effect of the chemical substances of Salix babylonica (SB) extract on in vitro rumen fermentation of five mixed rations with different maize silage to concentrate ratios. Fifty-nine compounds were identified in SB extract using the retention time and mass spectral technique. Interactive effects were noted (P < 0.001) for the asymptotic gas production (GP) (b), the rate of production (c), the initial delay before GP begins (L), pH, dry matter digestibility, metabolizable energy (ME), organic matter digestibility (OMD), short chain fatty acids (SCFAs), gas yield at 24 h (GY 24 ), microbial crude protein, and in vitro GP. Both 1.2 and 1.8 mL SB/g DM had the highest (P < 0.05) b and c values. Addition of 1.2 and 1.8 mL SB/g DM linearly improved (P < 0.001) ME, OMD, SCFAs, and GY 24 . It could be concluded that, based on the highly detected interaction effects between ration types and extract doses for fermentation parameters and GP, the most effective dose of SB varied between incubated total mixed rations. However, the ration of 25% silage and 75% concentrate had the highest nutritive value, especially at doses of 1.2 to 1.8 mL SB/g DM total mixed ration.

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Effect of Ruminal Degradability of Crude Protein and Nonstructural Carbohydrates on the Efficiency of Bacterial Crude Protein Synthesis and Amino Acid Flow to the Abomasum of Dairy Cows

Cited by 27 publications

References 32 publications

Adaptive changes in microbial synthesis and nitrogen balance with progressing dietary feeding periods in sheep fed diets differing in their ruminal degradation synchronicity between nitrogen and organic matter

Adaptive changes in microbial synthesis and nitrogen balance with progressing dietary feeding periods in sheep fed diets differing in their ruminal degradation synchronicity between nitrogen and organic matter

Evaluation of the effects of synchronising the availability of N and energy on rumen function and production responses of dairy cows – a review

In vitro gas production of five rations of different maize silage and concentrate ratios influenced by increasing levels of chemically characterized extract of Salix babylonica

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