Influence of fibrolytic enzymes on growth performance and digestion in steers grazing stargrass and supplemented with fermented sugarcane

Gómez-Vázquez, Armando; Mendoza, G. D.; Aranda, E. M.; Pérez, Jorge; Hernández, A.; Pinos-Rodríguez, Juan Manuel

doi:10.1080/09712119.2011.558670

Cited by 15 publications

(5 citation statements)

References 10 publications

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“…Therefore, there was a possible improvement in production traits with the supplementation of fibrolytic enzyme used in commercial steer's feed. Gomez-Vazquez et al (2011) conducted an experiment to evaluate the influence of exogenous fibrolytic enzymes on growth performance and digestion in steers grazing star grass and supplemented with concentrate and sugarcane fermented. Enzyme doses were 0, 15 or 30 g fibrolytic enzyme/kg concentrate.…”

Section: Production Responses In Ruminantsmentioning

confidence: 99%

Exogenous Enzymes in Ruminant Nutrition: A Review

Sujani¹,

Seresinhe²

2015

Asian J. of Animal Sciences

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The concept of supplementation of ruminant diets with exogenous enzymes is not new though a considerable research interest on this field has been emerged from 1990s. Availability of wide range of exogenous enzyme products, development of better methods to evaluate enzyme activity, revised knowledge on rumen functions and recent advances of biotechnology which lowers the cost of enzyme production have fuelled the enzyme utilization in ruminant industries. The exogenous enzymes used in ruminant diets can be characterized in to main categories as fibrolytic, amylolytic and proteolytic based on specific substrate on which their enzyme activity can perform. The sources of these exogenous enzymes are mainly four bacterial species, three fungal species and some yeasts. Solid State Fermentation (SSF) and Submerged Fermentation (SmF) are the major methods for enzyme extraction which have combined with several other biotechnological aspects. The enzyme application method can vary in a wide range from applying to forage at harvesting, at ensiling, at feeding and the portion of feed which is mixed with enzyme may also vary from to forage to concentrate to a part of totally mixed rations. Up to date numerous number of researches have been done with ruminants like cattle both dairy and beef, goat, sheep and less with buffalo. The results seems to be inconsistent but positive results on feed intake, nutrient digestibility, growth performance, other production parameters, manure nutrient excretion etc., have been obtained. Therefore more fine-tuned research efforts are highly suggested for the generalization of exogenous enzyme usage in ruminant nutrition.

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Section: Production Responses In Ruminantsmentioning

confidence: 99%

Exogenous Enzymes in Ruminant Nutrition: A Review

Sujani¹,

Seresinhe²

2015

Asian J. of Animal Sciences

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“…Other factors known to affect the composition and digestibility of forage are varieties and cultivars (Ørskov et al 1990;Emile Mile et al 2007;Bartl et al 2009), environmental and seasonal effects (Mathison et al 1999;Jacobsen et al 2005), proportion of different morphological fractions of forage (Agbagla-Dohnani et al 2001;Fulkerson et al 2008), stage of maturity at harvested (Meyer et al 1957;Ammar et al 2008). In addition, the effect of additives such as enzymes (Go´mez-Va´zquez et al 2011) on digestibility has also been studied.…”

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confidence: 99%

Chemical composition,in vitrodigestibility and kinetics of fermentation of whole-crop forage from 18 different varieties of oat (Avena sativaL.)

Kafilzadeh

Heidary

2013

Journal of Applied Animal Research

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The aim of this study was to compare the yield of forage and the yield of digestible organic matter as well as chemical composition and kinetics of fermentation of forage produced from 18 different varieties of oat (Avena Sativa L.) grown under the same agronomic condition. Dry matter and organic matter digestibility were determined using in vitro two-stage method and gas production technique was used to measure the kinetics of fermentation of forage from different varieties. Yield of forages varied significantly from 15.6 to 26.3 ton haLGorskij 1026 variety had the highest forage yield. The content of crude protein, neutral detergent fibre (NDF), acid detergent fibre (ADF) and acid detergent lignin (ADL) were significantly (PB0.01) different among varieties of oat used in this study. There were significant (PB0.01) differences among varieties in terms of in vitro dry matter digestibility (IVDMD) and organic matter digestibility (IVOMD) and metabolisable energy (ME) from 18 varieties of oat forage. Possum and LGorskij 1026 varieties had the highest and lowest IVOMD, respectively (67/4 vs. 54/9%). The ME varied from 5.76 to 7.13 MJ kg(1 DM. The mean value of digestible organic matter (DOM) yield was 10.8 ton ha ).Significant difference was observed in the potential gas production (A), constant rate (c) and lag time among different varieties. The fractional rate of gas production (c, h(1 ) ranged from 0.029 to 0.040. The result emphasised that in any evaluation of oat varieties, not only yield and digestibility but also kinetics of digestion or fermentation should be taken into consideration.

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“…Previous experiences with increasing exogenous fibrolytic enzyme doses with tropical forages also showed a linear response in NDF digestion and ADG in growing steers [3,4]. Experiments conducted with sheep with forages of different quality suggest that one of the main factors in the response to exogenous fibrolytic enzymes is the quality of the forage, particularly its potentially digestible fraction [1].…”

Section: Discussionmentioning

confidence: 89%

“…The productive response of ruminants to dietary exogenous enzymes depends on several factors such as the type of enzyme, the daily dose, the rumen environment, and the characteristics of forages and diet composition [1], which could explain the variability of responses observed to date [2]. Nevertheless, there are some experiments where increasing doses of exogenous fibrolytic enzymes with low-quality forages showed a linear response in NDF digestion and daily gain in growing steers [3,4], and a similar dose response was observed with fibrolytic enzymes in milk production with dairy cattle [5]. However, there may be a limit where the response to enzyme supplementation will be nonlinear [6,7].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Increasing Dietary Concentrations of a Multi-Enzyme Complex in Feedlot Lambs’ Rations

Mendoza-Martínez,

Hernández-García,

Díaz-Galván

et al. 2024

Animals

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The objective of this study was to evaluate the effects of increasing levels of the M-E complex (xylanase, glucanase, cellulase, and invertase) Optimax E® on the performance of growing lambs, their digestibility, and their rumen microbiota, and to estimate NEm, NEg, and ruminal methane levels. Forty lambs (Katahdin x Dorset; 22.91 ± 4.16 kg) were randomly assigned to dietary concentrations of ME (0, 0.2, 0.4, and 0.8% DM) and fed individually for 77 days. Increasing M-E improved feed conversion (p < 0.05) as well as NEm and NEg (p < 0.05), which were associated with increased in vivo DM and NDF digestion (linear and quadratic p < 0.01). Few microbial families showed abundancy changes (Erysipelotrichaceae, Christensenellaceae, Lentisphaerae, and Clostridial Family XIII); however, the dominant phylum Bacteroidetes was linearly reduced, while Firmicutes increased (p < 0.01), resulting in a greater Firmicutes-to-Bacteroidetes ratio. Total Entodinium showed a quadratic response (p < 0.10), increasing its abundancy as the enzyme dose was augmented. The daily emission intensity of methane (per kg of DMI or AGD) was reduced linearly (p < 0.01). In conclusion, adding the M-E complex Optimax E® to growing lambs’ diets improves their productive performance by acting synergistically with the rumen microbiota, modifying the Firmicutes-to-Bacteroidetes ratio toward more efficient fermentation, and shows the potential to reduce the intensity of greenhouse gas emissions from lambs.

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Influence of fibrolytic enzymes on growth performance and digestion in steers grazing stargrass and supplemented with fermented sugarcane

Cited by 15 publications

References 10 publications

Exogenous Enzymes in Ruminant Nutrition: A Review

Exogenous Enzymes in Ruminant Nutrition: A Review

Chemical composition,in vitrodigestibility and kinetics of fermentation of whole-crop forage from 18 different varieties of oat (Avena sativaL.)

Evaluation of Increasing Dietary Concentrations of a Multi-Enzyme Complex in Feedlot Lambs’ Rations

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