Evaluation of a Nonstarch Polysaccharidase Feed Enzyme in Dairy Cow Diets

Beauchemin, K. A.; Rode, L. M.; Maekawa, Masao; Morgavi, Diego P.; Kampen, R.

doi:10.3168/jds.s0022-0302(00)74914-9

Cited by 99 publications

(98 citation statements)

References 14 publications

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“…Beauchemin et al (1995) also reported differences in the ration DM intake according to the enzyme dose in steers fed enzyme-treated forages, DM intake was reduced for medium doses whereas it increased for high and low doses. Moreover, Beauchemin et al (2000) indicated greater improvements in DM intake when the enzyme was added to the concentrate portion of the ration at a low dose rather than at a high dose in dairy cows.…”

Section: Fill Value Evaluation Experimentsmentioning

confidence: 94%

Performance of dairy ewes fed diets with a fibrolytic enzyme product included in the concentrate during the suckling period

Flores

Caja

Casals

et al. 2008

Animal

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Seventy-two multiparous ewes from two dairy breeds (Manchega, n 5 36 and Lacaune, n 5 36) were used in a replicated 2 3 2 factorial design to evaluate the effects of diet supplementation with an exogenous fibrolytic enzyme product on lactation performance and feed intake during the suckling period (weeks 1 to 4) according to breed. Ewes were blocked in groups of nine and fed ad libitum after lambing a diet based on 70% forage and 30% concentrate to which the enzyme was added after pelleting. Experimental concentrates were: control (without enzyme) and enzyme (fibrolytic enzyme complex, included at 0.47% volume to weight of concentrate). Twenty-four dry and open ewes (Manchega, n 5 12 and Lacaune, n 5 12) were also grouped by breed and used to measure the fill value of the ration used. During the suckling period, milk yield, milk composition, dry matter intake, lamb growth, as well as body weight change and body condition score change were not affected by enzyme supplementation. Breed effect was significant for milk yield, the Manchega ewes yielding less milk with a higher content of milk components than the Lacaune ewes. The opposite was observed for dry matter intake. Enzyme supplementation reduced intake by 9% in the dry ewes, resulting in a greater fill value of the diet. In conclusion, no lactational effects were detected when the fibrolytic enzyme product was added to the concentrate fed to dairy ewes.

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Section: Fill Value Evaluation Experimentsmentioning

confidence: 94%

Performance of dairy ewes fed diets with a fibrolytic enzyme product included in the concentrate during the suckling period

Flores

Caja

Casals

et al. 2008

Animal

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“…Numerous studies have reported increased digestion of DM and fibre measured in situ or in vitro (Nakashima et al 1988;Feng et al 1996;Hristov et al 1996;Yang et al 1999;Colombatto 2000;Colombatto et al 2002) or in vivo (Feng et al 1996;Krause et al 1998;Yang et al 1999;Beauchemin et al 2000;Kung et al 2000). These increases in feed digestion are somewhat unexpected given the exceptionally high starch and fibre digesting capacity of the rumen.…”

Section: Mode Of Actionmentioning

confidence: 95%

Mode of action of exogenous cell wall degrading enzymes for ruminants

Beauchemin¹,

Colombatto²,

Morgavi³

et al. 2004

Can. J. Anim. Sci.

121

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Rode, L. M. 2004. Mode of action of exogenous cell wall degrading enzymes for ruminants. Can. J. Anim. Sci. 84: [13][14][15][16][17][18][19][20][21][22]. Recent studies have shown that adding exogenous fibrolytic enzymes to ruminant diets can increase milk production of dairy cows and weight gain of growing beef cattle as a result of enhanced feed digestion. While much progress has been made in terms of advancing feed enzyme technology for ruminants, considerable research is still required to develop more effective enzyme products. The mode of action whereby exogenous enzymes improve digestion of plant cell wall is complex, and there is evidence for numerous potential modes of action suggesting they are interdependant. A mode of action that accounts for the most critical factors that explain the observed increases in feed digestion is presented. Adding exogenous enzymes to the diet increases the hydrolytic capacity of the rumen mainly due to increased bacterial attachment, stimulation of rumen microbial populations and synergistic effects with hydrolases of ruminal microorganisms. The net effect is increased enzymic activity within the rumen, which enhances digestibility of the total diet fed. Thus, improvements in digestibility are not limited to the dietary component to which the enzymes are applied, which explains why fibrolytic enzymes can be effective when added to supplement or grain. The magnitude of the improvements in feed digestibility reported in some research studies using feed enzymes suggests a viable future for enzyme products in commercial ruminant production systems. A more complete understanding of the mode of action of these products will allow development of low-cost enzyme products designed specifically to improve feed digestion by ruminants. Des études récentes montrent que l'addition d'enzymes fibrolytiques exogènes à la ration des ruminants accroît la production des vaches laitières et le poids gagné par les bovins de boucherie à cause d'une meilleure digestion des aliments. Bien que la technologie des enzymes alimentaires destinés aux ruminants ait progressé, il reste encore beaucoup à faire avant qu'on arrive à des produits enzymatiques plus efficaces. La manière dont les enzymes exogènes facilitent la digestion de la paroi cellulosique est particulièrement complexe et tout indique que les nombreux modes d'action potentiels sont interdépendants. Les auteurs proposent un mode d'action qui tient compte des principaux facteurs expliquant la meilleure digestion des aliments observée. L'addition d'enzymes exogènes à la ration accroît la capacité d'hydrolyse du rumen principalement à cause d'une meilleure fixation des bactéries, d'une stimulation de la microflore du rumen et de la synergie avec les hydrolases des microorganismes. Il s'ensuit une plus grande activité enzymatique dans le rumen, ce qui améliore la digestibilité de la ration. Cette meilleure digestibilité ne vient donc pas uniquement de la composante alimentaire à laquelle s'attaquent les enzymes, ce qui explique l'efficacité de...

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“…galacto-oligosaccharides, are known to suppress ammonia producing bacteria, and stimulate the production of Bifidobactrium, which has the ability to assimilate ammonia as a N source (Deguchi et al, 1993). Beauchemin et al (2000) found that enzyme supplementation decreased NH 3 N value before and after feeding. This decreasing in NH 3 N was likely caused by an increase in ruminal availability of slowly digestible carbohydrates due to enzyme supplementation.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Two Products of Direct-Fed Microbial Supplementation on the Nutrient Utilization and Ruminal Fermentation in Sheep

Sallam¹,

Allam

Najadi³

2014

JAS

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This experiment was undertaken to evaluate the potential impacts of supplementing two direct-fed microbial (DFM) products, namely Bactozyme and Ru-max, to the diet of 12 male Barki sheep (live body weight 46.6 ± 2.9 kg) on dry matter intake (DMI), apparent total tract digestibility of nutrients, nitrogen balance and rumen fermentation characteristics. The Bactozyme or Ru-max were supplemented at a rate of 1.0 g/head/day, mixed with the concentrate mixture. Animals were randomly allocated into 3 equal groups (n=4) and were subjected to the digestibility trails.The results showed that the inclusion of either products of DFM had no positive impact on DMI, but non-significantly improved the apparent total tract digestibility of dry matter (DM), organic matter (OM) and crude protein (CP). However, the Bactozyme addition increased (P<0.05) the apparent total tract digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF). The enhancement of the apparent total tract digestibility of cell wall was not significant for the two of DFM products and a non-significant improvement in cell wall digestion due to the Ru-max supplementation over the control group was found. The DFM products had positive impacts on the average of total digestible nutrients (TDN) and digestible crude protein (DCP) but non significant in comparison with the untreated animals. In addition, the nitrogen balance was improved (P>0.05) by 8 and 13% due to Ru-max and Bactozyme supplementation, respectively in comparison with the control group. The results also revealed that inclusion of DFM products had no impacts on rumen pH 3.0 and 6.0 h after feeding but Bactozyme reduced (P<0.05) the rumen pH 1.0 h after feeding compared to the control group. The inclusion of Bactozyme and Ru-max increased (P>0.05) the NH 3 -N concentration in the rumen at 1.0 and 3.0 h after feeding but the Bactozyme decreased (P<0.05) the NH 3 -N concentration and increased the volatile fatty acids (VFA) at 6.0 h after feeding compared to the control group. Overall, results indicated that the two DFM products had positive impacts on cell wall digestibility, which in turn improves metabolic energy supply and nutrients utilization in ruminants as well.

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Evaluation of a Nonstarch Polysaccharidase Feed Enzyme in Dairy Cow Diets

Cited by 99 publications

References 14 publications

Performance of dairy ewes fed diets with a fibrolytic enzyme product included in the concentrate during the suckling period

Performance of dairy ewes fed diets with a fibrolytic enzyme product included in the concentrate during the suckling period

Mode of action of exogenous cell wall degrading enzymes for ruminants

Comparison of Two Products of Direct-Fed Microbial Supplementation on the Nutrient Utilization and Ruminal Fermentation in Sheep

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