Effect of Monensin with Cottonseed Hulls and Energy Supplements for Growing Steers2

Vijchulata, Pravee; Henry, P. R.; Ammerman, C. B.; Potter, Stuart; Becker, H.

doi:10.2527/jas1980.50141x

Cited by 9 publications

(3 citation statements)

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“…These diets are high in roughage and generally support gains in the range of .4 to .9 kg'head -1 d-'. Results of confined-growing-cattle studies have generally indicated that monensin fed at 150 to 200 mg.head-ld -1 or 33 ppm in complete diets improves rate of gain (Utley et al, 1976;Pendlum et al, 1980;Adams et al, 1981) and(or) feed efficiency (Muller et al, 1978;Hanson and Klopfenstein, 1979;Perry et al, 1979;Vijchulata et al, 1980;Perry et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

Effect of Monensin on the Performance of Cattle on Pasture or Fed Harvested Forages in Confinement

Potter

Muller

Wray

et al. 1986

Journal of Animal Science

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Three series of trials were conducted to evaluate the effect of monensin on the growth performance of cattle. Twenty-four trials were conducted to evaluate the addition of monensin at 200 mg/d to limited quantities of supplemental concentrate for growing cattle grazing pastures. The pastures ranged from dormant end-of-the-season grasses and crop residues to lush green pastures, and were located in several different states. Pasture plus supplement supported gains of control cattle (without monensin) of .24 to .96 kg, with an average of .56 kg/d. The addition of 200 mg monensin to the supplement increased daily gain in all 24 trials by an average of .09 kg daily (+16.3%). Eleven trials were conducted with monensin and energy supplements fed at .907 kg.- head-1 X d-1 to growing cattle grazing growing, nondormant pastures for an average period of 117 d. Each trial was designed to compare the performance of unsupplemented cattle, cattle fed a supplement and cattle fed a supplement with monensin. Cattle on pasture gained .50 kg daily. Supplement feeding increased average daily gain by .09 kg and the addition of monensin to the supplement further increased gain by .09 kg, for a total increase of .18 kg (34.2%). The efficiencies with which supplemental feed was converted to extra gain (kg supplement/kg gain) for the supplement-only and the monensin treatment groups were 10.1:1 and 5.0:1, respectively. In a series of 12 trials, monensin was added at a level of 33 mg/kg air-dry diet to limited quantities of supplemental feed for cattle fed harvested forages in confinement. All trials compared monensin feeding with a nonmedicated control treatment. Hay was fed in 8 of the 12 trials, fresh-cut green-chop in two trials and ensiled corn stover and ensiled milo stover in one trial each. Monensin reduced feed intake by -3.1%, improved average daily gain by .09 kg (+14.4%) and improved feed efficiency by 15.3%.

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Section: Introductionmentioning

confidence: 99%

Effect of Monensin on the Performance of Cattle on Pasture or Fed Harvested Forages in Confinement

Potter

Muller

Wray

et al. 1986

Journal of Animal Science

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“…Monensin 2, a ruminal propionate enhancer (Richardson et al, 1976), improves feed efficiency of feedlot cattle fed high-concentrate diets by reducing daily feed intake with little effect on average daily gain (Raun et al, 1976;Utley et al,, 1976;Boling et al, 1977;Vijchulata et al, 1980). In cattle grazing pasture or fed forage in confinement, average daily gain is generally improved when monensin is fed at 200 mg/d (Oliver, 1975;Potter et al, 1976;Boling et al, 1977;Steen et al, 1978;Males et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

Administration of Monensin in Self-Fed (Salt Limiting) Dry Supplements or on an Alternate-Day Feeding Schedule

Muller¹,

Potter²,

Wray³

et al. 1986

Journal of Animal Science

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Two series of trials were conducted to evaluate alternative methods of administering monensin to pasture cattle. In a series of five trials, monensin was incorporated into supplements at 440 mg/kg to provide an average intake of 200 mg X head-1 X d-1 for growing cattle on pasture. Comparisons were made between daily and alternate-day feeding of the supplements. A control treatment consisting of unmedicated supplement fed daily also was included. Monensin at 200 mg/d and 400 mg on alternate days increased gain by .077 (P less than .01) and .082 (P less than .01) kg/d above control-cattle gains (.54 kg daily). Nine pasture trials were conducted to compare the effectiveness of monensin in increasing the daily gain of growing cattle when hand-fed daily in a supplement or self-fed in supplements that contained salt to regulate supplement intake. Desired supplement intakes were approximately .454 kg X head-1 X d-1 in six trials, .68 kg/d in one trial and 1.81 kg/d in two trials. Monensin produced gain increases of .09 kg daily (P less than .01) with both feeding systems. The daily gains of cattle that were hand-fed and self-fed were equal (P greater than .10). Self-fed treatments containing monensin required fewer changes in salt level than self-fed treatments not containing monensin, and the salt levels required to limit intake were generally 25 to 50% lower when monensin was in the supplement.

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“…The effects of feeding monensin to ruminants on high roughage diets vary. Although feed efficiency is usually improved, intake may decrease as it does with high concentrate diets (Dinius and Baile, 1977;Lemeneager et al, 1978a;Lemeneager, 1978b;Baile et al, 1979;and Vijchulata et al, 1980). Alternatively, intake may not be suppressed, with the result that average daily gains increase (Potter et al, 1976).…”

Section: Effects Of Monensin On Animal Performancementioning

confidence: 99%

Effects of monensin on volatile fatty acid kinetics in steers

Armentano

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INTRODUCTION 1 REVIEW OF LITERATURE 2 Introduction to In Vivo Kinetics 2 Microbial Metabolism in the Rumen 9 Measurement of Ruminai VFA Production 12 In vitro technique for rumen VFA production 12 Isotope dilution techniques for rumen VFA production 13 Trans-portal measurement to determine rumen VFA production 24 VFA Metabolism by Ruminant Tissues Measured In Vivo 25 Isotope dilution studies 25 Trans-organ balance studies 29 Mode of Action of Monensin 33 Effects of monensin on animal performance 33 History and chemistry of monensin 34 Effects of monensin on rumen fermentation and microbial population 35 Effects of monensin on rumen turnover and feed intake Effects of monensin on digestibility 43 Effects of monensin on protein metabolism in the rumen Summary of monensin effects MATERIALS AND METHODS Trial 1 Animal management and experimental design Experimental protocol 58 Chemical analyses , Analysis of data Trial 2 70 Animals and experimental design 70 Experimental protocol 71 iii Page Chemical analyses 72 Analysis of data 78 RESULTS AND DISCUSSION Trial 1 Trial 2 84 Combined Results of Trial 1 and Trial 2 96 General Discussion Usefulness of multi-compartmental models Modeling rumen VFA kinetics

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Effect of Monensin with Cottonseed Hulls and Energy Supplements for Growing Steers2

Cited by 9 publications

References 0 publications

Effect of Monensin on the Performance of Cattle on Pasture or Fed Harvested Forages in Confinement

Effect of Monensin on the Performance of Cattle on Pasture or Fed Harvested Forages in Confinement

Administration of Monensin in Self-Fed (Salt Limiting) Dry Supplements or on an Alternate-Day Feeding Schedule

Effects of monensin on volatile fatty acid kinetics in steers

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