Essai sur l'adaptation de la fermentation ruminale au monensin

Mbanzamihigo, Léonidas; Nevel, Christian Van; Demeyer, D.

doi:10.1051/rnd:19950401

Cited by 20 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Time had no (P > 0.05) effect on milk fat percentage (Table 2). Figure 1 shows that monensin reduced and sustained a 7 to 9% reduction in CH 4 production (g/d and g/kg of BW) for 6 mo, in agreement with other previous studies (e.g., Davies et al, 1982;Mbanzamihigo et al, 1995Mbanzamihigo et al, , 1996Rogers et al, 1997) that have shown 40-to 240-d CH 4 reductions as long as monensin was fed.…”

Section: Resultssupporting

confidence: 90%

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Odongo

Bagg

Vessie

et al. 2007

Journal of Dairy Science

151

137

View full text Add to dashboard Cite

The objective of this study was to determine the longterm effects of feeding monensin on methane (CH 4 ) production in lactating dairy cows. Twenty-four lactating Holstein dairy cows (1.46 ± 0.17 parity; 620 ± 5.9 kg of live weight; 92.5 ± 2.62 d in milk) housed in a tie-stall facility were used in the study. The study was conducted as paired comparisons in a completely randomized design with repeated measurements in a color-coded, double-blind experiment. The cows were paired by parity and days in milk and allocated to 1 of 2 treatments: 1) the regular milking cow total mixed ration (TMR) with a forage-to-concentrate ratio of 60:40 (control TMR; placebo premix) vs. a medicated TMR (monensin TMR; regular TMR + 24 mg of Rumensin Premix/kg of dry matter) fed ad libitum. The animals were fed and milked twice daily (feeding at 0830 and 1300 h; milking at 0500 and 1500 h) and CH 4 production was measured prior to introducing the treatments and monthly thereafter for 6 mo using an open-circuit indirect calorimetry system. Monensin reduced CH 4 production by 7% (expressed as grams per day) and by 9% (expressed as grams per kilogram of body weight), which were sustained for 6 mo (mean, 458.7 vs. 428.7 ± 7.75 g/d and 0.738 vs. 0.675 ± 0.0141, control vs. monensin, respectively). Monensin reduced milk fat percentage by 9% (3.90 vs. 3.53 ± 0.098%, control vs. monensin, respectively) and reduced milk protein by 4% (3.37 vs. 3.23 ± 0.031%, control vs. monensin, respectively). Monensin did not affect the dry matter intake or milk yield of the cows. These results suggest that medicating a 60:40 forage-to-concentrate TMR with 24 mg of Rumensin Premix/kg of dry matter is a viable strategy for reducing CH 4 production in lactating Holstein dairy cows.

show abstract

Section: Resultssupporting

confidence: 90%

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Odongo

Bagg

Vessie

et al. 2007

Journal of Dairy Science

151

137

View full text Add to dashboard Cite

show abstract

“…After short periods of time (up to 30 d) levels of CH 4 production returned to pre‐ionophore supplementation levels, probably due to an ability of the ruminal microflora to adapt to the ionophore (Johnson and Johnson, 1995). The shift in VFA profile (higher percentage of propionate) was maintained for long periods of time (Mbanzamihigo et al, 1995; Richardson et al, 1976; Rogers et al, 1997), indicating that the uncoupling effect of ionophores on CH 4 production and VFA profile is not in agreement with the stoichiometrical relationship of the ruminal fermentation (Wolin, 1960), as long as no other means to eliminate the excess of H + in the rumen is provided (Hino and Asanuma, 2003). On the other hand, several other studies (Davies et al, 1982; Mbanzamihigo et al, 1995, 1996; Rogers et al, 1997) have shown a long‐term (40–240 d) effect of monensin on CH 4 depression with no evidence of microbial adaptation.…”

Section: Effects Of Ionophores On Methane Productionmentioning

confidence: 99%

Potential Environmental Benefits of Ionophores in Ruminant Diets

2003

View full text Add to dashboard Cite

A concern of the USEPA is the volatilization of NH3 from animal manure and CH4 produced from ruminal fermentation. Excess N in the environment has been associated with adverse effects on human health, and CH4 and N2O emissions are sources of greenhouse gases. The objectives of this paper are to summarize and quantify the benefits of ionophores, principally monensin, in decreasing NH3 and CH4 emissions to the environment and reducing resource utilization in cattle (Bos spp.) production. The data indicate that monensin in the diets of ruminants may decrease protein degradation in the rumen and may increase feed protein utilization by an average of 3.5 percentage units. These changes would have an effect in reducing N losses and decreasing fecal N and the amount of protein that must be fed to meet animal requirements. Additionally, CH4 is produced by enteric fermentation in ruminants, which is responsible for about 33 to 39% of CH4 emissions from agriculture. Ionophores can reduce CH4 production by 25% and decrease feed intake by 4% without affecting animal performance. The inclusion of monensin in beef and dairy cattle diets may benefit air quality by reducing CH4 and N emissions and water quality by reducing N in manure, which can potentially leave the farm through leaching into ground water and through runoff into surface water.

show abstract

“…C 2 H 6 (99.99% purity, Air Liquide, Belgium) was infused continuously through the rumen fistula during 6 h at a rate of 10 mL min -1 using a dosimeter (Brooks instruments B.V., G/T 1000, the Netherlands). Total gas expelled through the rumen fistula of each sheep was collected in large PVC columns (17.5 L and 7.5 L) as described by Van Nevel et al (1970) and modified by Mbanzamihigo et al (1995) for monitoring several animals. At the end of the gas collection, total rumen gas produced during 6 h, mixed with C 2 H 6 , was sampled (1 mL) using gas tight syringes.…”

Section: Collection Of Rumen Gasesmentioning

confidence: 99%

Methane emissions from the rumen of sheep fed a mixed grass-clover pasture at two fertilisation rates in early and late season

Mbanzamihigo¹,

Fievez²,

Gomez³

et al. 2002

Can. J. Anim. Sci.

Self Cite

View full text Add to dashboard Cite

. Methane emissions from the rumen of sheep fed a mixed grass-clover pasture at two fertilisation rates in early and late season. Can. J. Anim. Sci. 82: 69-77. In vivo CH 4 production from four rumen-fistulated sheep fed fresh ryegrass-white clover (Lolium perenne -Trifolium repens) diets ad libitum was monitored using C 2 H 6 as a tracer gas. Treatments comprised mixed pastures at two different fertilisation rates (0 vs. 150 kg N ha -1 yr -1 ) and at two periods in the growing season (early, June-July vs. late, August-September). Higher crude protein (CP) [22.5% dry matter (DM)] in late vs. early season (13% DM) was associated with increased importance of protein fermentation, as suggested by higher rumen concentrations of iso-acids [3.7 ± 1.0 vs. 2.4 ± 0.9% total volatile fatty acids (VFA)]. However, rumen CH 4 production (25.8 ± 5.0 L kg -1 DMI) was not affected, probably because of compensatory seasonal changes in the chemical composition of the pasture, su0 as reduced water-soluble carbohydrates (WSC) (13.0 ± 2.6 vs. 4.9 ± 1.4% DM) or increased neutral detergent fibre (NDF) (48.5 ± 6.1 vs. 57.4 ± 4.6% DM). Although clover saponins might have a defaunation and CH 4 inhibitory effect, considerable seasonal or fertiliser-induced changes in clover proportion did not affect rumen protozoal concentrations (8.8 ± 1.6 × 10 5 mL -1 rumen contents, early season), rumen methanogenesis or microbial growth as suggested from urinary excretion of purine derivatives (6.7 ± 1.7 mmol d -1 ). In contrast, however, a clear animal effect was found: on average, one animal produced less CH 4 than the three others (20.3 vs. 27.6 L kg -1 DMI).Key words: Ryegrass, clover, N fertilisation, season, rumen, methane Mbanzamihigo, L., Fievez, V., da Costa Gomez, C., Piattoni, F., Carlier, L. et Demeyer, D. 2002. Les émissions ruminales de méthane par des moutons alimentés avec un pâturage mixte de rye grass-trèfle blanc à deux niveaux de fertilisation et au début et à la fin de l'été. Can. J. Anim. Sci. 82: 69-77. La production de CH 4 in vivo était mesurée sur 4 moutons fistulés au niveau du rumen et alimentés ad libitum avec de l'herbe fraîche en utilisant l'C 2 H 6 comme gaz traceur. Des pâturages mixtes (rye grass, Lolium perenne / trèfle blanc, Trifolium repens) à deux niveaux de fertilisation (0 vs. 150 kg N ha -1 an -1 ) ont été étudiés au début (Juin-Juillet) et à la fin (Août-Septembre) de l'été. Le pourcentage de PB plus élevé à la fin qu'au début de la saison estivale (22.5 % vs. 13 % matière sèche) était associée avec une fermentation protéique plus importante, comme le suggèrent les pourcentages plus élevés des iso-acides dans le rumen (3.7 ± 1.0 vs. 2.4 ± 0.9 % AGV totaux). Néanmoins, la production ruminale de CH 4 (25.8 ± 5.0 L kg -1 matière sèche ingérée) n'a pas changé, probablement à cause des effets compensatoires, de la diminution du taux de WSC (13.0 ± 2.6 vs. 4.9 ± 1.4 % matière sèche) ou de l'augmentation du NDF (48.5 ± 6.1 vs. 57.4 ± 4.6 % matière sèche) observées à la fin de la saison. Malgré la defaunation potent...

show abstract

Essai sur l'adaptation de la fermentation ruminale au monensin

Cited by 20 publications

References 12 publications

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Potential Environmental Benefits of Ionophores in Ruminant Diets

Methane emissions from the rumen of sheep fed a mixed grass-clover pasture at two fertilisation rates in early and late season

Contact Info

Product

Resources

About