Effects of exogenous fibrolytic enzymes on ruminal digestibility in steers fed high fiber rations

Alvarez, Gregorio; Pinos-Rodríguez, Juan Manuel; Herrera, José Anaya; Río-García, Juan Carlos Del; González, S.; Bárcena, R.

doi:10.1016/j.livsci.2008.05.024

Cited by 26 publications

(20 citation statements)

References 28 publications

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“…Comparatively lower fiber digestion observed in T-2 than T-1 group may be due to the inhibitory effect on endogenous production of fibrolytic enzymes in animals supplemented with more than optimum level of these enzymes (Shojaeian and Thakur 2007a). The results of the present study are in accordance with those of Bowman et al (2002) and Shojaeian and Thakur (2007b); Alvarez et al (2009) also reported increased digestibility of DM and OM when EFE were supplemented through the concentrate portion of the ration. Krueger et al (2008) reported that supplementation of EFE to steers fed on hay-based diet increased (P<0.05) the DM digestibility as well as NDF digestibility than for those fed control hays.…”

Section: Nutrient Digestibilitysupporting

confidence: 92%

“…Many studies have reported increased digestion of dry matter (DM) and fiber measured in situ, in vitro (Elwakeel et al 2007;Bandla et al 2008;Gallardo et al 2010), as well as in vivo (Kung et al 2000;Alvarez et al 2009). Recent studies have also shown that adding EFE to ruminant diets increases the milk production Shojaeian and Thakur 2007b;Miachieo and Thakur 2007) and average daily gain (McAllister et al 1999;Cruywagen and Goosen 2004).…”

Section: Introductionmentioning

confidence: 99%

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Effect of exogenous fibrolytic enzymes supplementation on milk production and nutrient utilization in Murrah buffaloes

Shekhar

Thakur

Shelke

2010

Trop Anim Health Prod

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The present study was conducted to evaluate the effect of commercial exogenous fibrolytic enzyme (EFE) mixture added at 1.5 and 3.0 g (cellulase 4,000 microM glucose/g/h + xylanase 7,990 microM xylose/g/min; 50:50 w/w) per kilogram of dry matter (DM) of feed on nutrient digestibility, milk production, milk composition, and some blood constituents in lactating Murrah buffaloes. Eighteen buffaloes were allotted to three dietary treatments, on the basis of milk yield (8.48, 8.52, and 8.53 kg/day) and days in lactation (68.5, 80.33, and 82.00) for 90 days. The buffaloes were fed a total mixed ration (TMR) comprising of 45% chaffed wheat straw, 15% chopped green maize, and 40% concentrate on DM basis (control group), the same TMR plus EFE at 1.5 g/kg DM (T-1 group) and the same TMR plus EFE at 3.0 g/kg DM (T-2 group) supplemented through the concentrate mixture. There was no effect of fortifying EFE mixture on DM intake and crude protein intake (grams per day) whereas total digestible nutrients intake (kilogram per day) was higher by (P < 0.05) 12.53% in T-1 group over that of control, and there was no significant difference between T-2 and control groups. The average daily milk yield and 4% fat-corrected milk (FCM) yield was higher (P < 0.05) by 12.99% and 15.17% in T-1 group as over that of control, and there was no difference between T-2 and control groups. There was no (P > 0.05) difference in blood glucose and blood urea nitrogen concentration in different experimental groups. It is concluded that supplementation of cellulase and xylanase mixture at 1.5 g/kg of DM of TMR containing wheat straw (45%), green maize (15%), and concentrate (40%) on DM basis significantly increased (P < 0.05) the average daily milk yield and FCM yield in Murrah buffaloes due to improved dietary fiber digestion.

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Section: Nutrient Digestibilitysupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of exogenous fibrolytic enzymes supplementation on milk production and nutrient utilization in Murrah buffaloes

Shekhar

Thakur

Shelke

2010

Trop Anim Health Prod

View full text Add to dashboard Cite

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“…Ammonia N concentrations at all sampling hours were unaffected by supplementation of xylanase. Similar result were found (Á lvarez et al, 2009;Bowman et al, 2002;Sutton et al, 2003;Yang et al, 1999) because Ammonia N in the rumen occur from degradation of protein or urea by enzyme from ruminal microorganisms. But the main effect of supplementation xylanase is an increase in the digestion of fiber (xylan) which shows no effects on Ammonia N concentration in rumen.…”

Section: Discussionsupporting

confidence: 79%

Effects of xylanase supplementation on ruminal digestibility in fistulated non-lactating dairy cows fed rice straw

2012

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“…In addition, the 24 h pre -incubation of feed sample with enzymes in our study might have enhanced the attachment of enzymes to the cell wall component and thus improved fermentation of the feeds. The positive effect of pre-feeding treatment has been elaborated earlier by many researchers due to the enzyme-substrate pre-incubation interaction (Elwakeel et al, 2007;Alvarez et al, 2009). According to Kung et al (2002), the formation of stable enzyme-feed complex might increase the resistance of the enzymes to proteolysis and lengthen their residence during later fermentation periods.…”

Section: Relative Improvement Of In Vitro Gas Production and Fibre Dementioning

confidence: 92%

Methane production of two roughage and total mixed ration as influenced by cellulase and xylanase enzyme addition

Gemeda

Hassen

2015

Sci. agric. (Piracicaba, Braz.)

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In recent decades supplementation of animal feeds with exogenous fibrolytic enzymes has substantially improved digestibility and animal performance. However, information related to associated methane production is limited and inconsistent. This study evaluated the effect of cellulase and xylanase enzymes on in vitro methane production of Eragrostis curvula hay, maize (Zea mays) stover and a total mixed ration (TMR) at seven levels of the two enzymes.Feed samples were incubated for 2, 12, 24 and 48 h in an in vitro batch culture with buffer and rumen fluid, and fibrolytic enzymes. Gas production was measured using a pressure transducer connected to a data tracker, while methane gas was analysed using a gas chromatograph which was calibrated with standard CH 4 and CO 2 . Increases in the level of enzyme application resulted in increases in gas volume, total volatile fatty acid (VFA) production, dry matter (DM) disappearance and associated increases in methane production. The linear increase in percentage and volume of methane production in tandem with increases in level of enzyme application might be due to increased fermentation, and organic matter degradability that resulted in a shift in VFA production towards acetate. Considering the efficiency of DM and neutral detergent fiber degradation and production of associated VFA with levels of enzymes, the use of 1 mg g −1 DMof enzyme can be a good option for the feeds tested. However, they cannot decrease methane production. It will be very important to consider other hydrogen sinks that can capture directly extra H + produced by the addition of enzyme so that their supplementation could be very efficient and environmentally sound.

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Effects of exogenous fibrolytic enzymes on ruminal digestibility in steers fed high fiber rations

Cited by 26 publications

References 28 publications

Effect of exogenous fibrolytic enzymes supplementation on milk production and nutrient utilization in Murrah buffaloes

Effect of exogenous fibrolytic enzymes supplementation on milk production and nutrient utilization in Murrah buffaloes

Effects of xylanase supplementation on ruminal digestibility in fistulated non-lactating dairy cows fed rice straw

Methane production of two roughage and total mixed ration as influenced by cellulase and xylanase enzyme addition

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