Enzyme Additions to Fattening Cattle Rations

Burroughs, Wise; Woods, Walter; Ewing, S. A.; Greig, J. Russell; Theurer, Brent

doi:10.2527/jas1960.192458x

Cited by 45 publications

(30 citation statements)

References 1 publication

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“…Consistent with our results, no signifi cant effects of enzyme supplementation in cell wall digestibility were observed by Burroughs et al (1960) and Hristov et al (2000) in fattening cattle and heifers, respectively. Moreover, Judkins and Stobart (1987), Yang et al (2000) and Pinos-Rodríguez et al (2002) also reported non signifi cant effects of enzyme supplementation on NDF and ADF digestibilities in lambs.…”

Section: Resultssupporting

confidence: 81%

“…Enzyme supplementation also improved NDF and ADF digestibilities in beef steers fed forage diets (Beauchemin et al, 1995;Feng et al, 1996;Krause et al, 1998). Increased digestibility by effect of enzyme translated into increased milk yield Yang et al, 1999;Kung et al, 2000) or into increased growth rate in fattening cattle (Burroughs et al, 1960;Beauchemin et al, 1995). Yang et al (2000) tried to support the improvement of digestibility observed in dairy cows with two digestion experiments in wether lambs with no signifi cant effects being found between control and enzyme supplemented diets.…”

Section: Resultsmentioning

confidence: 99%

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In vivo digestibility and in vitro gas production of diets supplemented with fibrolytic enzymes in dairy goats

Gonzalez-Garcia¹,

Caja²,

Albanell³

et al. 2008

J. Anim. Feed Sci.

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Digestive effects of diet supplementation with an exogenous fi brolytic enzyme preparation (cellulase and xylanase activities) were evaluated under in vivo and in vitro conditions. Eight lactating Murciano-Granadina dairy goats (four per treatment) were used to measure the total tract digestibility of an ad libitum total mixed ration (forage, 65%; concentrate, 35%) to which the enzyme was, or was not, added to the concentrate. In vitro degradability and gas production were also studied using 2 goats (1 per dietary treatment) as ruminal liquor donors. Dry matter digestibility increased by effect of the enzyme supplemented goats, while digestibilities of organic matter, protein and fi bre fractions did not vary. Differently, in vitro trial showed no differences either in dry matter or fi bre degradabilities or in gas production. In conclusion, supplementing dairy goat concentrate with a fi brolytic enzyme preparation, under our conditions, enhanced in vivo dry and organic matter digestibilities although the effects were not observed in vitro.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

In vivo digestibility and in vitro gas production of diets supplemented with fibrolytic enzymes in dairy goats

Gonzalez-Garcia¹,

Caja²,

Albanell³

et al. 2008

J. Anim. Feed Sci.

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“…For forage diets, Feng et al (1996) reported that adding an enzyme preparation containing cellulase and xylanase activities improved in vitro and in vivo digestibility. Similar increases in digestibility of forage-based diets have been noted by others (Ralston et al 1962;Rust et al 1965;Perry et al 1966;Judkins and Stobart 1988;Beauchemin et al 1995), although not always (Burroughs et al 1960;Beauchemin et al 1995).…”

Section: Cattle Performancesupporting

confidence: 61%

“…Some earlier studies with ruminants also reported improvements in ADG and FCR as a beneficial effect of enzyme supplements (Burroughs et al 1960;Clark et al 1961;Rovics and Ely 1962). However, the composition and application rates of enzyme supplements used in those studies were not well defined making it difficult to compare our results with the literature.…”

Section: Cattle Performancementioning

confidence: 99%

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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“…In contrast, other research has reported a positive effect of enzyme supplementation on DMI of dairy cows (Beauchemin et al, 2000) and feedlot cattle (Burroughs et al, 1960;Beauchemin et al, 1995), but this increase only produced a higher milk yield in the early lactation period under negative energy balance ). An increase in DMI was also observed by PinosRodríguez et al (2002) when fi brolytic enzyme was used in lambs.…”

Section: Results and Discusionmentioning

confidence: 58%

Lactational effects of adding a fibrolytic enzyme complex to the concentrate of lactating dairy goats

González¹,

Caja²,

Albanell³

et al. 2008

J. Anim. Feed Sci.

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Twenty-four multiparous Murciano-Granadina dairy goats in mid-lactation (wk 8 to 30) were used in a single cross-over design to evaluate the effects of supplementation with an exogenous fi brolytic enzyme preparation, characterized by cellulase and xylanase activities, on feed intake, milk yield and composition, and liveweight and body condition changes. Goats received ad libitum a basal total mixed ration composed of 65% forage and 35% concentrate. The treatments were: control (without enzyme) and experimental with enzyme (included at the recommended commercial dose of 4.7 ml/kg concentrate). Feed intake, milk yield, 4% fat corrected milk yield, and milk composition were not affected by enzyme supplementation, although milk casein content tended to decrease in the enzyme treatment. Body weight change tended to be higher with the enzyme treatment.

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Enzyme Additions to Fattening Cattle Rations

Cited by 45 publications

References 1 publication

<i>In vivo</i> digestibility and <i>in vitro</i> gas production of diets supplemented with fibrolytic enzymes in dairy goats

<i>In vivo</i> digestibility and <i>in vitro</i> gas production of diets supplemented with fibrolytic enzymes in dairy goats

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

Lactational effects of adding a fibrolytic enzyme complex to the concentrate of lactating dairy goats

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