Effect of exogenous enzymes on digestibility of barley silage and growth performance of feedlot cattle

McAllister, Tim A.; Oosting, S.J.; Popp, J. D.; Mir, Z.; Yanke, L. J.; Hristov, A.N.; Treacher, R.J.; Cheng, Kwai Wa

doi:10.4141/a98-099

Cited by 101 publications

(64 citation statements)

References 21 publications

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“…Although most of the published literature have reported increased total tract digestibility of DM, OM or both following treatment with a fibrolytic enzyme mixture (e.g., Rode et al, 1999;Yang et al, 1999;Beauchemin et al, 2000), other studies have reported no effect of exogenous fibrolytic enzyme on digestibility DM or OM (e.g., Lewis et al, 1999;McAllister et al, 1999McAllister et al, , 2000Yang et al, 2000) in agreement with the current study. In the present study, the elevated DM and OM intakes and unchanged apparent digestibility coefficient of the diet (Table 2) was probably accompanied by faster rate of ruminal and total tract rate of passage.…”

Section: Resultssupporting

confidence: 90%

Effects of abomasal infusion of cottonseed oil and dietary enzyme supplementation on dairy goats

Jalilvand¹,

Naserian²,

Odongo

et al. 2007

J. Anim. Feed Sci.

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Three lactating multiparous Sannen dairy goats in late lactation (146±7 days of milk) were used in a 3×3 Latin square design to determine the effects of abomasal infusion of cottonseed oil and dietary enzyme supplementation on milk yield and composition. Treatments were twice daily abomasal infusion of 1. 50 ml d -1 water plus 5 g kemzyme enzyme kg -1 dry matter (DM) of feed (ENZ), 2. 50 g cottonseed oil d-1 (OIL), and 3. 50 g cottonseed oil d -1 plus 5 g kemzyme enzyme kg -1 DM of feed (ENZ+OIL). Goats were fed a basal diet of 40% lucerne hay and 60% concentrates offered ad libitum. Each experimental period consisted of 14 days of adaptation and 5 days of total collection. Abomasal infusion of cottonseed oil decreased (P<0.05) DM intake and increased (P<0.05) milk fat percentage. Dietary supplementation of enzyme in the diet increased (P<0.05) DM and organic matter (OM) intake but had no effect (P>0.05) on apparent digestibility of DM, OM, crude protein, acid detergent fibre, neutral detergent fibre and ether extract. Cholesterol and plasma triglycerides increased (P<0.05) with cottonseed oil infusion but infusion of cottonseed oil with dietary enzyme supplementation had no (P>0.05) added benefit on lactational performance of the goats. These results suggest that abomasal infusion of cottonseed oil increased the amount of lipids reaching the mammary tissues and therefore increased milk fat percentage without altering milk yields.

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Section: Resultssupporting

confidence: 90%

Effects of abomasal infusion of cottonseed oil and dietary enzyme supplementation on dairy goats

Jalilvand¹,

Naserian²,

Odongo

et al. 2007

J. Anim. Feed Sci.

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“…Digestion of plant cell walls, which is carried out by ruminal microorganisms, provides a large amount of energy for ruminants. Fibrolytic enzymes isolated from fungi fermentation cultures have been utilized to improve DMI and forage digestibility; particulate passage rate; and digestibility of DM, NDF, and ADF in beef steers (McAllister et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Effect of Dietary Supplementation With Fibrolytic Enzymes on the Productive Performance of Early Lactating Dairy Cows

Mohamed¹,

Borhami²,

El-Shazly³

et al. 2013

JAS

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This study was conducted to investigate the impacts of exogenous fibrolytic enzymes (Fibrozyme, Alltech inc company, USA) supplementation for 12 weeks on milk production and composition as well as blood metabolites in early lactating dairy cows. Total of 120 multiparous Holstein dairy cows at early lactation (57±4.2 days in milk) were randomly assigned into two groups according to lactation period "stage of lactation" and lactation season. The first group (control, n=60) were fed total mixed ration (TMR) without a supplement of exogenous fibrolytic enzymes. The second group (treatment, n=60) were fed TMR supplemented with a commercial exogenous fibrolytic enzymes at the rate of 15 g/cow/d for 12 weeks. Each group was placed in a shaded pen equipped with free stalls. An exogenous fibrolytic enzymes was added to the TMR at the time of feeding once per day at 10 am. Cows were fed as a group open feed, with free access to water.The results of this experiment on dairy cows showed that there were not significant changes in dry matter intake of lactating dairy cows with or without a supplement of exogenous fibrolytic enzymes at early lactation. Exogenous fibrolytic enzymes supplementd to lactating dairy cows improved (P<0.003) milk yield (41.0 vs. 39.5 kg/cow/d) compared to untreated dairy cows. Also, the fat corrected milk was increased (P<0.025) as a response to exogenous fibrolytic enzymes supplementation to lactating dairy cows compared to un-supplemented dairy cows. In addition, the supplementation of exogenous fibrolytic enzymes enhanced (P<0.006) the energy corrected milk (40.6 vs. 39.4 kg) and feed efficiency in early lactating dairy cows compared to the control group. The results revealed that supplementation of exogenous fibrolytic enzymes had no significant effect on milk fat, protein lactose and solid not fat (SNF) percentage compared to the control group of dairy cows. While, the quantities of milk protein (1.36 vs. 1.30kg), lactose (2.0 vs. 1.92kg) and SNF (3.47 vs. 3.31kg) in supplemented-dairy cows were improved significantly compared to the control group except quantity of milk fat (P<0.096). Serum glucose, albumin, urea and triglycerides were not affected (P>0.05) but total protein, globulin and cholesterol were declined (P<0.05) due to fibrozyme inclusion compared to control group of dairy cows. The supplementation of exogenous fibrolytic enzymes to early lactating dairy cows achieved higher net profit by 0.93 US$ per cow than control group. It is concluded that exogenous fibrolytic enzymes supplementation to early lactating dairy cows improved significantly milk production, SNF and energy corrected milk.

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“…McAllister et al (1999), avaliando o desempenho de novilhos em confinamento, observaram aumentos de 5,99 kg/dia para 6,72 kg/dia na ingestão de MS e de 0,94 kg/dia para 1,16 kg/dia no ganho médio diário com a suplementação enzimática (celulase e xilanase). Lewis et al (1995), em estudo com vacas em lactação consumindo forragem, também verificaram aumentos de 5 a 25% no consumo e na produção de leite com a adição de enzimas fibrolíticas exógenas na dieta.…”

Section: Introductionunclassified

Consumo e digestibilidade aparente total em bovinos sob suplementação com enzimas fibrolíticas

Martins¹,

Vieira

Berchielli

et al. 2006

R. Bras. Zootec.

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RESUMO -Avaliou-se o efeito da suplementação com enzimas fibrolíticas (celulase e xilanase) sobre o consumo e a digestibilidade aparente total dos nutrientes de dietas compostas de silagem de milho e feno de tifton 85 (Cynodon spp.) cortado aos 90 dias. Oito bovinos (340 kg de PV) fistulados no rúmen foram distribuídos em dois quadrados latinos 4 x 4, em esquema fatorial 2 x 2 (fonte de volumoso e adição ou não de enzimas). O complexo enzimático testado foi proveniente de fonte comercial e extraído dos fungos Aspergillus niger e Trichoderma longibrachiatum, sendo fornecido na quantidade de 12 g/ animal/dia, misturado à ração total. Não houve efeito da suplementação enzimática sobre o consumo de nutrientes para ambos os volumosos, porém, a adição de enzimas aumentou a digestibilidade total de FDN, FDA e CEL de 36,87; 36,21 e 46,89%, respectivamente, para 41,19; 40,01 e 50,46%, respectivamente.Palavras-chave: celulase, feno de tifton, ruminantes, silagem de milho, xilanase Intake and apparent total tract digestibility in cattle supplemented with fibrolytic enzymes ABSTRACT -The objective of this trial was to evaluate the effect of feeding fibrolytic enzyme (cellulose and xylanase) on intake and apparent total tract digestibility of nutrients in cattle receiving diets containing corn silage or Tifton 85 hay (Cynodon spp.). Eight animals fitted with ruminal cannulae and averaging 340 kg of body weight were randomly assigned to two replicated 4 x 4 Latin squares in a 2 x 2 factorial arrangement of treatments (forage sources with or without fibrolytic enzyme supplementation). The commercial enzymatic complex used, which was extracted from Aspergillus niger and Trichoderma longibrachiatum fungi was mixed with the forage and concentrate and supplied at a daily amount of 12 g/animal. There was no effect of enzymatic supplementation on nutrient intake for both forage sources. However, the addition of fibrolytic enzymes increased the apparent total tract digestibilities of neutral detergent fiber (NDF), acid detergent fiber (ADF) and cellulose from 36.87, 36.21, and 46.89% to 41.19, 40.01, and 50.46%, respectively. Key Words: cellulase, corn silage, ruminants, tifton hay, xylanase IntroduçãoNos sistemas de produção de ruminantes, grande parte (40 a 90%) das exigências nutricionais é atendida por meio de volumosos e, em algumas regiões do país, os rebanhos destinados à produção de carne e leite dependem de forragens conservadas para o suprimento de nutrientes durante os períodos de escassez de alimentos.Segundo Van Soest (1965), o consumo de alimentos é inversamente relacionado ao teor de FDN em dietas com mais de 60% deste nutriente, de modo que a parede celular é o constituinte da planta que possui maior relação com o consumo voluntário.O aproveitamento de alimentos fibrosos pelos ruminantes está relacionado à síntese e secreção de enzimas pelos microrganismos do rúmen, promovendo a hidrólise da parede celular das plantas. Entretanto, a conversão dos alimentos, especialmente os fibrosos, para produção de carne e leite ...

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Effect of exogenous enzymes on digestibility of barley silage and growth performance of feedlot cattle

Cited by 101 publications

References 21 publications

Effects of abomasal infusion of cottonseed oil and dietary enzyme supplementation on dairy goats

Effects of abomasal infusion of cottonseed oil and dietary enzyme supplementation on dairy goats

Effect of Dietary Supplementation With Fibrolytic Enzymes on the Productive Performance of Early Lactating Dairy Cows

Consumo e digestibilidade aparente total em bovinos sob suplementação com enzimas fibrolíticas

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