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Formic acid as a silage additive

Effects of formic acid on fermentation in laboratory silos

Published online by Cambridge University Press:  27 March 2009

R. F. Wilson  and
R. J. Wilkins
R. F. Wilson
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire SLQ 5LR
R. J. Wilkins
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire SLQ 5LR
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Summary

Pure swards of cocksfoot and perennial ryegrass cut on three occasions and of lucerne cut on two occasions were ensiled in test-tube silos after three treatments: (i) unwilted without additive, (ii) unwilted after the addition of formic acid at 0-23 % of fresh weight, and (iii) wilted to a water content of about 70 %, with no additive. Replicate silos were opened at intervals up to 105 days in order to follow the course of fermentation.

Silages from the final sampling could be divided into two clearly defined groups. Those where the lactic acid content, expressed as a percentage of total fermentation acids (L %T), was over 60 (19 silages) were considered stable while those with a value less than 20 (5 silages) were considered unstable.

The addition of formic acid resulted in a reduction in pH of the ensiled material from 5–86 + 0–12 to 4–60 ±0–11. This value changed little during the first 6 days after ensiling but then fell as lactic and acetic acids were formed. Stable silages made from unwilted crops without additive contained more lactic acid than those made with formic acid, but the converse was true for unstable silages. The ammonia content of silages made from unwilted material was always lower when formic acid had been applied. Wilting before ensiling gave stable silages from all crops.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 81 , Issue 1 , August 1973 , pp. 117 - 124
Copyright
Copyright © Cambridge University Press 1973

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References

Association of Official Agricttltubal Chemists (1965). Official Methods cf Analysis of the Association of Official Agricultural Chemists, 10th edn.Washington: Ass. Off. Agric. Chem.Google Scholar
Castle, M. E. & Watson, J. N. (1970). Silage and milk production, a comparison between grass silages made with and without formic acid. J. Br. Grassld Soc. 25, 65–70.CrossRefGoogle Scholar
Conway, E. J. (1957). Microdijfusion Analysis and Volumetric Error. London: Crosby Lockwood and Son Ltd.Google Scholar
Elsden, S. R. & Gibson, Q. H. (1954). The estimation of lactic acid using eerie sulphate. Biochem. J. 58, 741–55.CrossRefGoogle Scholar
Hagedorn, H. C. & Jensen, B. N. (1923). Zur Mikrobestimmung des Blutzuckers mittels Ferricyanid. Biochem. Z. 135, 46–58.Google Scholar
McDonald, P., Watson, S. J. & Whittenbury, R. (1966). The principles of ensilage. Z. Tierphysiol. Tierernahr. Futtermittelk. 21, 103–10.CrossRefGoogle Scholar
McDonald, P. & Whittenbtiry, R. (1967). Losses during ensilage. Br. Qrassld Soc. Occ. Symp. 3, 76–84.Google Scholar
Naeeland, G. O. (1968). Utvikling av LTI-Syreutstyr. Forsoksmelding nr. 14, Landbruksteknisk Institutt, Vollebekk.Google Scholar
Norgaard, Pedersen E. J., Moller, E. & Skovborg, E. B. (1968). Forsøg med Tilsaetning af myresyre og. AlV-syre ved ensilering af graesmarksafgrøder. Tidsskr. PlAvl 72, 356–66.Google Scholar
Playne, N. J. & McDonald, P. (1966). The buffering constituents of herbage and of silage. J. Sci. Fd Agric. 17, 264–8.CrossRefGoogle Scholar
Saue, O. & Breirem, K. (1969). Formic acid as a silage additive. Proc. 3rd gen. Meet. Eur. Grassld Fed. pp. 161–72.Google Scholar
Taylor, M. M. & Phillips, J. D. (1970). The bacterial flora of the four silages. Appendix to: Castle, M. E. & Watson, J. N. (1970). Silage and milk production, a comparison between grass silages made with and without formic acid. J. Br. Grassld Soc. 25, 70–1.Google Scholar
Waldo, D. R., Smith, L. W. & Moore, L. A. (1969). Growth, intake and digestibility from formic acid silage versus hay. J. Dairy Sci. 52, 1609–16.CrossRefGoogle Scholar
Wieringa, G. W.(1958). The effect of wilting on butyric acid fermentation in silage. Neth. J. agric. Sci. 6, 204–10.Google Scholar
Wilson, R. F. & Wilkins, R. J. (1972). An evaluation of laboratory ensiling techniques. J. Sci. Fd Agric. 23, 377–85.CrossRefGoogle Scholar
Wilson, R. F. & Wilkins, R. J. (1973). Formic acid as a silage additive for wet crops of cocksfoot and lucerne. J. agric. Sci., Camb. 80, 225–31.CrossRefGoogle Scholar
Wilson, R. K. (1969). Effects of fertiliser N, additives and season on silage fermentation in laboratory silos. Ir. J. agric. Res. 8, 307–18.Google Scholar
Wiseman, H. G. & Irvin, H. N. (1957). The determination of organic acids in silage. J. agric. Fd Chem. 5, 213–15.CrossRefGoogle Scholar
Zimmer, E. (1966). Die Neufassung das Garfutterschliissels nach Flieg. Wirtschaftseigene Futter 12, 299–303.Google Scholar