geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Effect of magnesium and potassium on microbial fermentation in a continuous culture fermentation system with different levels of monensin or lasalocid


, : Effect of magnesium and potassium on microbial fermentation in a continuous culture fermentation system with different levels of monensin or lasalocid. Journal of Animal Science 65(6): 1633-1638

Two continuous culture fermentation experiments were used to determine ruminal microbial fermentation in the presence of monensin (Exp. 1) or lasalocid (Exp. 2) with different dietary concentrations of Mg and K. In each experiment, eight 500-ml continuous culture fermentors were supplied with late-cut coastal bermudagrass (80%) and cellulose (20%) as substrate during five trials with two levels of Mg (.07 and .14%), K (.6 and 2.5%) and either monensin (Exp. 1: 0 and 20 mg/kg) or lasalocid (Exp. 2; 0 and 20 mg/kg) in a 2 .times. 2 .times. factorial arrangement of treatments (each trial served as a replication). Substrate was added every 8 h (5 g/fermentor) for 5 d and digesta samples were collected every 2 h for 6 h and at 20 h for volatile fatty acid (VFA) analysis on d 6. In Exp. 1, monensin decreased (P < .05) the acetate:propionate ratio (A:P) from 2.98 to 2.22. A Mg .times. monensin interaction was observed for the molar percentage of acetate and propionate (P < .05). There was a 4.8% reduction in acetate (mol/100 mol) when monensin was fed with .07% Mg and a 12.6% decrease (P < .01) when fed with .14% Mg compared with diets not containing monensin. Propionate (mol/100 mol) increased 14% when monensin was fed with .07% Mg and 32% (P < .001) when fed with .14% Mg compared with diets not containing monensin. Potassium did not affect VFA concentrations in the presence of monensin or Mg. In Exp. 2, lasalocid decreased (P < .01) the A:P ratio from 3.53 to 2.86. There was a Mg .times. lasalocid interaction (P < .01) for butyrate (mol/100 mol). Lasalocid lowered (P < .001) butyrate (mol/100 mol) 35% when fed with .07% Mg and 53% when fed with .14% Mg. A lasalocid .times. K iteraction existed for propionate (P < .10) and butyrate (P < .10) and butyrate (P < .05; mol/100 mol). Lasalocid increased (P < .10) propionate molar proportion 30% when fed with .6% K and 41% when fed with 2.5% K compared with diets not contaiign lasalocid. Butyrate molar proportion decreased (P < .05) more when lasalocid was fed with 2.5% K than when fed with .6% K. These data suggest that previously reported inconsistent results with monensin and lasalocid supplementation may have been due to these ionophores' interactions with other nutrients. Furthermore, these results suggest that the efficacy of monensin and lasalocid in altering the VFA concentrations of ruminal fermentation might be enhanced by optimizing other nutrients.

US$29.90

PMID: 3443582


Other references

Neil,K., 2008: How to use lactate in equine practice. This article discusses the physiology and physiopathology of lactate production, applications of lactate monitoring, and current and potential indications for lactate measurement in horses. The usefulness of lactate as a predictor of survival, tri...

Smith J.D.; Longmore A.R., 1980: Behavior of phosphate in estuarine water. The phosphate load in many rivers has been increased through soil disturbance and discharge of sewage and other wastes. Understanding how much phosphate may be removed from the waters of rivers and estuaries to the sediment would aid waste disposa...

Farjanel, J.; Ronziere, M.C.; Rattner, A.; Frey, J., 1976: Study of the effect of calcium on the pro collagen proline hydroxylase stage of collagen metabolism. Ca effects on procollagen-proline-hydroxylase activity of chick embryo tibias was studied. Serial preincubation of the natural substrate, the enzymatic preparation or the mixture of both with and without Ca showed that Ca decreased procollagen-pro...

Lears, L., 1997: Research in the emergency department. Health Care Ethics Usa 5(2): 4-5

Liu, B.D.; Yang, B.; Dierre, B.; Sekiguchi, T.; Jiang, X., 2014: Local defect-induced red-shift of cathodoluminescence in individual ZnS nanobelts. The luminescence of semiconductor nanostructures is strongly dependent on their size, dimensions, morphology, composition, or defects, and their band emissions can be properly and selectively tailored through the rational manipulation of these par...

Ghizzoni, L.; Cappa, M.; Vottero, A.; Ubertini, G.; Carta, D.; D.I.rgi, N.; Gasco, V.; Marchesi, M.; Raggi, V.; Ibba, A.; Napoli, F.; Massimi, A.; Maghnie, M.; Loche, S.; Porzio, O., 2011: Relationship of CYP21A2 genotype and serum 17-hydroxyprogesterone and cortisol levels in a large cohort of Italian children with premature pubarche. Premature pubarche (PP) is the most frequent sign of nonclassic congenital adrenal hyperplasia (NCCAH) due to 21-hydroxylase deficiency in childhood. The aim of this study was to assess the relationship between the CYP21A2 genotype and baseline an...

Kojo-Austin, H.; Malin, M.; Hemminki, E., 1993: Women's satisfaction with maternity health care services in Finland. The purpose of this study was to describe the Finnish maternity health care system and to determine the level of satisfaction in general with maternity health care services and specifically with hospital clinic visits in Helsinki, Finland. Informa...

Tworoger, S.S.; Hecht, J.L.; Giovannucci, E.; Hankinson, S.E., 2006: Intake of folate and related nutrients in relation to risk of epithelial ovarian cancer. Assessments of the relation between folate intake and ovarian cancer risk have been limited and inconsistent. Therefore, the authors prospectively examined the association of dietary and supplemental intakes of folate, methionine, and vitamin B-6...

Elands, C.M.; Anderson, K.A.; Ward, N.; Vijn, P.; Marston, H.M.; Hill, D.R., 2002: Effects of several GABAA ligands on rat sleep-wake behaviour and pharmaco-EEG. Methods & Findings in Experimental & Clinical Pharmacology 24(Suppl D): 162

Rotz, C.A.; Wachendorf, M.; Herrmann, A.; Kornher, A.; Taube, F., 2002: A modelling approach to management impacts on nitrogen fluxes in specialised dairy farms. Whole farm simulation was used to evaluate the long-term effects of cropping and feeding strategies on N losses from a typical dairy farm on the sandy soils of Northern Germany. Nitrogen loss per unit of milk produced was lowest when maize silage...