Cell wall degrading enzymes for silage. 1. The fermentation of enzyme‐treated ryegrass in laboratory silos

Selmer-Olsen, I.; Henderson, A. R.; Robertson, S.; McGinn, Ryan

doi:10.1111/j.1365-2494.1993.tb01835.x

Cited by 34 publications

(19 citation statements)

References 18 publications

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“…Evidence has shown that added enzymes signi®cantly decrease the contents of NDF and ADF of silages, 10,23,24 while no signi®cant changes were also reported by several workers. 22,25 When the same enzymes were added to fresh rhodesgrass at the same level as in this study, the reduction in NDF and ADF was found regardless of the storage temperature.…”

Section: Discussionmentioning

confidence: 66%

“…22 The rate of enzyme application (50 mg kg À1 ) was considerably lower in this study compared with those reported in other experiments. 10,23,24 This was de®ned by manufacturer's recommendation that a higher level of enzymes would produce an ef¯uent owing to the higher activity of Acremonium cellulase than of conventional commercial cellulases.…”

Section: Discussionmentioning

confidence: 99%

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Ensiling characteristics and ruminal degradation of Italian ryegrass and lucerne silages treated with cell wall-degrading enzymes

Nishino

Kishida

et al. 1999

J. Sci. Food Agric.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Ensiling characteristics and ruminal degradation of Italian ryegrass and lucerne silages treated with cell wall-degrading enzymes

Nishino

Kishida

et al. 1999

J. Sci. Food Agric.

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“…Nadeau et al (2000) and Selmer-Olsen et al (1993) reported a similar reduction in NDF concentrations during ensiling of alfalfa and Italian ryegrass. The reduction in NDF during ensiling is likely due to the breakdown of NDICP, which is mediated by plant proteolytic enzymes (Nadeau et al 2000;Mustafa et al 2002).…”

Section: Changes In Fiber Fractions During Ensilingmentioning

confidence: 58%

Ensiling characteristics, ruminal nutrient degradabilities and whole tract nutrient utilization of berseem clover (Trifolium alexandrinum L.) silage

Mustafa¹,

Séguin²

2003

Can. J. Anim. Sci.

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P. 2003. Ensiling characteristics, ruminal nutrient degradabilities and whole tract nutrient utilization of berseem clover (Trifolium alexandrinum L.) silage. Can. J. Anim. Sci. 83: 147-152. A study was conducted to determine ensiling characteristics and nutrient utilization by ruminants of berseem clover silage (BCS). Ensiling characteristics were determined by ensiling forage in mini-silos for 0, 2, 4, 8, 16 and 70 d. Two lactating Holstein cows fitted with ruminal cannulas were utilized to determine ruminal nutrient degradabilities while six ram lambs were used to determine total tract nutrient digestibilities. Ruminal and whole tract nutrient utilization of BCS were compared with those of alfalfa silage (AS). Results showed that BCS went through a rapid fermentation as shown by a significant (P < 0.05) reduction in pH during the first 2 d post-ensiling. Most of the proteolytic activity took place between day 0 and day 2 as indicated by a reduction (P < 0.05) in true protein and neutral detergent insoluble protein and an increase (P < 0.05) in non-protein nitrogen. Relative to AS, BCS had a similar ruminal degradability of dry matter (DM), a lower degradability of crude protein (CP), and a higher (P < 0.05) degradability of neutral detergent fiber (NDF). Relative to AS, BCS had a higher (P < 0.05) whole-tract digestibility of DM (70.7 vs. 66.0%), organic matter (71.5 vs. 65.9%), NDF (65.6 vs. 54.5), acid detergent fiber (64.6 vs. 54.6) and gross energy (69.6 vs. 64.0), but a lower (P < 0.05) wholetract digestibility of CP (69.2 vs. 75.9%). These results suggest that BSC could replace AS as a forage source for ruminants. Deux vaches Holstein en lactation canulées au rumen ont servi à déterminer la dégradation des nutriments dans le rumen, alors que six agneaux mâles ont permis d'établir la digestibilité totale des mêmes éléments dans le tractus digestif. L'assimilation des nutriments de l'ensilage de trèfle d'Alexandrie (ETA) dans le rumen et le système digestif a été comparée à celle des éléments nutritifs de l'ensilage de luzerne (EL). Le trèfle d'Alexandrie fermente rapidement, comme le révèle la baisse significative (P < 0,05) du pH survenue les deux jours suivant l'ensilage. La protéolyse se produit surtout dans les deux premiers jours, ainsi que l'indiquent la réduction (P < 0,05) de la concentration de protéines vraies et de protéines insolubles au détergent neutre, d'une part, et l'augmentation (P < 0,05) de l'azote non protéique, d'autre part. La matière sèche de l'ETA s'avère plus digestible (P < 0,05) dans le tractus digestif que celle de l'EL (70,7 c. 66,0 %). Il en va autant pour la matière organique (71.5 c. 65,9 %), la fibre au détergent neutre (65,6 c. 54,5 %), la fibre au détergent acide (64,6 c. 54,6 %) et l'énergie brute (69,6 c. 64,0 %), mais la protéine brute est moins digestible (P < 0,05) (69,2 c. 75,9 %). Les résultats de l'expérience laissent croire que l'ETA pourrait remplacer l'EL comme source de fourrages pour les ruminants.Mots clés: Ensilage de trèfle d'Alexandrie, dégradation da...

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“…Consequently, the addition of enzymes to forage at ensiling has been reported to degrade silage cell wall and increase the availability of WSC that serve as substrate for LAB (McDonald et al, 1991;Spoelstra et al, 1992;Selmer-Olsen et al, 1993;Sheperd & Kung, 1996). Therefore, when LAB is combined with enzymes during ensiling, a stronger effect should be expected because more fermentable sugars will be released to produce more lactic acid in comparison with other fermentation products (Kung et al, 1991, Chen et al, 1994.…”

Section: Introductionmentioning

confidence: 99%

Effects of bacterial inoculants and an enzyme on the fermentation quality and aerobic stability of ensiled whole-crop sweet sorghum

Nkosi¹,

Vadlani²,

Brijwani³

et al. 2012

SA J. An. Sci.

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________________________________________________________________________________ AbstractA study was conducted to evaluate the effects of bacterial inoculation and cellulase on the fermentation quality of ensiled whole-crop sweet sorghum (WCSS, Sorghum bicolor L. Moench). The WCSS (323 g dry matter (DM)/kg, 251 g water soluble carbohydrates (WSC)/kg DM, 43 g crude protein (CP)/kg DM and 439 g neutral detergent fibre (NDF)/kg DM) was ensiled with i) no additive (control); ii) Lactobacillus buchneri (LB); iii) Lactobacillus plantarum (LP); and iv) LB+E, a combination of LB and enzyme. These treatments were ensiled in 1 L anaerobic jars for 25 days. The jars were opened on days 3, 7 and 15 to determine pH, while those of day 25 were sampled to determine nutrient composition, fermentation characteristics and aerobic stability. Inoculation reduced pH, butyric acid and ammonia-N and increased lactic acid content in sweet sorghum silage compared with the control. The aerobic stability of WCSS was improved with LB, while it was reduced with the homofermentative LP treatment compared with the control. The LB+E reduced the fibre, but increased residual WSC of silage. The aerobic stability of LB+E silage was lower than LB treated silage. Using enzymes to increase the WSC content of crops that already have high levels of WSC may result in reduced aerobic stability of silage. Further work is needed to evaluate these effects on silage produced on farm scale and on animal production performance. ________________________________________________________________________________

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Cell wall degrading enzymes for silage. 1. The fermentation of enzyme‐treated ryegrass in laboratory silos

Cited by 34 publications

References 18 publications

Ensiling characteristics and ruminal degradation of Italian ryegrass and lucerne silages treated with cell wall-degrading enzymes

Ensiling characteristics and ruminal degradation of Italian ryegrass and lucerne silages treated with cell wall-degrading enzymes

Ensiling characteristics, ruminal nutrient degradabilities and whole tract nutrient utilization of berseem clover (Trifolium alexandrinum L.) silage

Effects of bacterial inoculants and an enzyme on the fermentation quality and aerobic stability of ensiled whole-crop sweet sorghum

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