Fibrolytic enzymes increase fiber digestibility and growth rate of steers fed dry forages

Beauchemin, K. A.; Rode, L. M.; Sewalt, Vincent

doi:10.4141/cjas95-096

Cited by 201 publications

(156 citation statements)

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“…Moreover, enzyme supplementation may have modified the volatile fatty acids pattern in the rumen, as recently reported by Miller et al (2008), being responsible for the altering intake. 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: 86%

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: 86%

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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“…The cattle were from a previous experiment in which they had ad libitum access to forage diets supplemented with enzymes (Beauchemin et al 1995). The lighter weight animals from that experiment were chosen in order to ensure a finishing phase of at least 14 wk.…”

Section: Methodsmentioning

confidence: 99%

“…The ENZ1 treatment was similar to that used in a previous study with forage diets (Beauchemin et al 1995). Both enzyme mixtures were prepared by combining Spezyme CP (Genencor, Rochester, NY), primarily an endocellulase, and Xylanase B (Biovance Technologies Inc., The total mixed rations were offered once per day (10:00 h) at 110% of voluntary intake.…”

Section: Methodsmentioning

confidence: 99%

“…Availability of newer enzyme preparations combined with high costs of livestock production has prompted renewed interest in the potential of feed enzymes for ruminants. We recently reported that adding a commercial enzyme mixture containing xylanase and cellulase activities to hay diets substantially improved liveweight gain of cattle (Beauchemin et al 1995). Others reported that dairy cows fed forage treated with a fibrolytic enzyme solution ate more feed and produced 5 to 25% more milk (Lewis et al 1995;Stokes and Zheng 1995).…”

Section: Mots Clésmentioning

confidence: 99%

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Effects of fibrolytic enzymes in corn or barley diets on performance and carcass characteristics of feedlot cattle

Beauchemin¹,

Jones²,

Rode³

et al. 1997

Can. J. Anim. Sci.

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, Rode, L. M. and Sewalt, V. J. H. 1997. Effects of fibrolytic enzymes in corn or barley diets on performance and carcass characteristics of feedlot cattle. Can. J. Anim. Sci. 77: 645-653. A study was conducted to establish whether fibrolytic enzyme feed additives influence performance of feedlot cattle fed high grain diets, and to compare the effects of feeding diets of barley or corn on performance and carcass characteristics. Crossbred beef steers (408 kg) were offered high concentrate diets (95.1%, dry matter basis), consisting mainly of barley and barley silage or corn and corn silage. Concentrates were treated with either no enzyme or one of two enzyme mixtures. Calves were slaughtered after a 103-to 145-d feeding period at an average weight of 570 kg and 10.8 mm of backfat. Barley-fed calves grew faster (1.45 vs. 1.29 kg d -1 ), ate more dry matter (DM; 9.79 vs. 9.31 kg d -1 ), and converted DM to gain (6.85 vs. 7.35 kg DM kg -1 gain) more efficiently compared with corn-fed calves (P < 0.001). Meat from barley-fed calves tended to be more highly marbled and was brighter in colour than meat from corn-fed calves, but diet had no effect on muscle score, rib eye area, or carcass leanness. Effect of enzymes differed for corn and barley diets; Enzyme 1, a preparation with higher xylanase activity than Enzyme 2, improved (P < 0.05) feed conversion ratio of barley diets by 11% over the finishing period, but enzyme treatments had no such effect for corn diets. Fibrolytic enzymes can be used to improve the digestibility of barley-based diets, but are not advantageous for corn diets. Further work is necessary to determine optimum formulation and level of application of enzyme preparations for use in barley diets. Further study of the differences in carcass characteristics of cattle fed barley or corn diets is warranted to substantiate the trends observed on this limited group of animals. Par comparaison avec les animaux engraissés au maïs, les animaux nourris à l'orge l'emportaient (P < 0,001) par le GMQ (1,45 contre 1,29 kg), par le taux de consommation de matière sèche (m.s.) 9,31 kg et par l'indice de conversion (6,85 contre 7,35 kg m.s. kg -1 gain). La viande des veaux nourris à l'orge était généralement plus persillée et sa couleur était plus vive que chez les veaux nourris au maïs, les régimes n'ayant par ailleurs pas d'effets sur l'indice musculaire et sur la surface de la noix de côte ni sur la proportion de maigre dans la carcasse. L'effet des enzymes différaient selon le type de céréales utilisé : la préparation 1 possédant une plus forte activité de la xylanase que la préparation 2, améliorait de 11% (P < 0,05) l'indice de conversion des régimes à base d'orge durant la période de finition, mais un tel effet ne s'observait pas avec le régime à base de maïs. L'enzyme fibrolytique peut être utilisée pour améliorer la digestibilité des régimes à base d'orge, mais elle ne présente aucun avantage dans le cas des régimes à base de maïs. Il reste encore à déterminer la formulation et le niveau d'incorporation opt...

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“…Las enzimas fibrolíticas exógenas pueden ser empleadas como aditivos en la alimentación de los rumiantes, ya que se ha observado que pueden mejorar la digestibilidad de las dietas, particularmente en la degradabilidad de la materia seca y de las paredes celulares de diferentes forrajes (Beauchemin et al, 1995;Feng et al, 1996;Lewis et al, 1996).…”

Section: Introductionunclassified

Digestibilidad in situ de dietas con harina de nopal deshidratado conteniendo un preparado de enzimas fibrolíticas exógenas

Romo

Estrada

Haro

et al. 2006

Pesq. agropec. bras.

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Se evaluó el efecto de un preparado de enzimas fibrolíticas exógenas (celulasas y xilanasas) en la degradabilidad in situ de la materia seca (DisMS), fibra detergente neutro (DFDNr) y fibra detergente ácido residual (DFDAr), en dietas altas o bajas en harina de nopal deshidratado. Se aplicaron concentraciones de 0, 1, 2 y 3 g de enzima por kilogramo de materia seca al inicio y 24 horas antes de la degradación in situ. Se determinó la concentración de ácidos grasos volátiles totales y de nitrógeno amoniacal a las 0, 3, 6, 9, 12 y 24 horas después de aplicarse la enzima. No se observaron efectos en DisMS, DFDNr y DFDAr; la aplicación al inicio de la degradación in situ mostró valores más altos que a 24 horas para DisMS y DFDNr, pero fue menor para DFDAr. No se observaron diferencias en las interacciones entre niveles de enzima, tipo de dieta y tiempo de pretratamiento. La aplicación de 1 y 3 g de enzima, en la dieta con bajo contenido de harina de nopal, tuvo efectos en el incremento de los ácidos grasos volátiles totales; para el nitrógeno amoniacal, los mejores resultados ocurrieron con 0 y 1 g de enzima.

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Fibrolytic enzymes increase fiber digestibility and growth rate of steers fed dry forages

Cited by 201 publications

References 1 publication

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

Effects of fibrolytic enzymes in corn or barley diets on performance and carcass characteristics of feedlot cattle

Digestibilidad in situ de dietas con harina de nopal deshidratado conteniendo un preparado de enzimas fibrolíticas exógenas

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