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The effect of formic acid treatment and the duration of the wilting period on the digestion of silage by young steers

Published online by Cambridge University Press:  02 September 2010

E. Charmley ,
M. Gill  and
C. Thomas
E. Charmley
Affiliation:
AFRC Institute for Grassland and Animal Production, Hurley, Maidenhead SL6 SLR
M. Gill
Affiliation:
AFRC Institute for Grassland and Animal Production, Hurley, Maidenhead SL6 SLR
C. Thomas
Affiliation:
AFRC Institute for Grassland and Animal Production, Hurley, Maidenhead SL6 SLR
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Abstract

Four silages were prepared from perennial ryegrass: two unwilted, ensiled either without (UWN) or with formic acid additive (UWA) and two wilted for either 19 (WS) or 43 h (WL) prior to ensiling. The influence of conservation method on digestion in the rumen and the flow of organic mater (OM) and nitrogen (N) to the small intestine was studied using young steers fitted with rumen and duodenal T-piece cannulae. The silages were well preserved and of similar chemical composition despite a 1·5-fold increase in dry matter (DM) following wilting. The unwilted silages had a higher concentration of fermentation acids and a lower concentration of soluble N in the DM. Polyester bag studies showed that significantly more DM was potentially degradable but the degradation rate was slower in the rumen of steers fed UWA and WS silages (P < 0·05), however, rate of passage was not significantly different for the four treatments. Conservation method had little effect on post-feeding rumen ammonia concentration but feeding unwilted silages caused a greater depression in post-feeding rumen pH (P < 0·05). Wilting lowered N digestibility in the whole tract (P < 0·05), but had no effect on apparent digestion or degradability of N in the rumen as measured by the polyester bag method. Apparent OM digestibility in the whole tract was lower in steers given wilted rather than unwilted silages (P < 0·05), but disappearance of apparently digestible OM in the rumen was greatest for the 19 h wilted silage (WS, P < 0·05). It is concluded that, provided unwilted silage is well preserved, the use of formic acid has little effect on digestion of silage by steers and the effects of wilting are confined to a reduction in whole tract digestibility.

Keywords

cattledigestionformic acidsilagewilting
Type
Research Article
Information
Animal Production , Volume 51 , Issue 3 , December 1990 , pp. 497 - 504
Copyright
Copyright © British Society of Animal Science 1990

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References

REFERENCES

Agricultural Research Council. 1984. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Beever, D. E., Thomson, D. J., Cammell, S. B. and Harrison, D. G. 1977. The digestion by sheep of silages made with and without the addition of formaldehyde. Journal of Agricultural Science, Cambridge 88: 61–70.CrossRefGoogle Scholar
Beever, D. E., Thomson, D. J., Ulyatt, M. J., Cammell, S. B. and Spooner, M. C. 1985. The digestion of fresh perennial ryegrass (Lolium perenne L. cv. Melle) and white clover (Trifolium repens L. cv. Blanca) by growing cattle fed indoors. British Journal of Nutrition 54: 763–775.CrossRefGoogle ScholarPubMed
Chalmers, M. I. 1963. The significance of the digestion of protein within the rumen on the nutrition of the animal. In Progress in Nutrition and Allied Sciences (ed. Cuthbertson, D. B.), pp. 91–103. Oliver and Boyd, Edinburgh.Google Scholar
Chamberlain, D. G., Thomas, P. C. and Wait, M. K. 1982. The rate of addition of formic acid to grass at ensilage and the subsequent digestion of the silage in the rumen and intestines of sheep. Grass and Forage Science 37: 159–164.CrossRefGoogle Scholar
Charmley, E. and Thomas, C. 1989. Effect of duration of wilting on the conservation of silage and on gains in body components by steers. Animal Production 48: 91–98.CrossRefGoogle Scholar
Charmley, E. and Veira, D. M. 1989. Inhibition of proteolysis at harvest using heat in alfalfa silages: effects on silage composition and digestion by sheep. Journal of Animal Science 68: 758–766.CrossRefGoogle Scholar
Christian, K. R. and Coup, M. R. 1954. Measurement of feed intake by grazing cattle and sheep. New Zealand Journal of Science and Technology A 36: 328–330.Google Scholar
Durand, M., Zelter, S. Z. and Tisserand, J. L. 1968. Influence de la machine de recolte sur la valeur des ensilages de graminees pour les genisses de race laitiere. Annales de Biologie Animate, Biochimie Biophysique 8: 45–67.CrossRefGoogle Scholar
Evans, R. T., Skelton, K. V. and Beever, D. E. 1981. Portable equipment for the automatic sampling of duodenal contents from housed or grazing cattle. Laboratory Practice 30: 997–1000.Google Scholar
Faichney, G. J. 1980. The use of markers to measure digesta flow from the stomach of sheep fed once daily. Journal of Agricultural Science, Cambridge 94: 313–318.CrossRefGoogle Scholar
Kaiser, A. G., Osbourn, D. F. and England, P. 1983. Intake, digestion and nitrogen retention by calves given ryegrass silages: influence of formaldehyde treatment and supplementation with maize starch or maize starch and urea. Journal of Agricultural Science, Cambridge 100: 63–74.CrossRefGoogle Scholar
Merchen, N. R. and Satter, L. D. 1983. Changes in nitrogenous compounds and sites of digestion of alfalfa harvested at different moisture contents. Journal of Dairy Science 66: 789–801.CrossRefGoogle Scholar
Morgan, C. A., Edwards, R. A. and McDonald, P. 1980. Intake and metabolism studies with fresh and wilted silages. Journal of Agricultural Science, Cambridge 94: 287–298.CrossRefGoogle Scholar
ØRskov, E. R. and McDonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science, Cambridge 92: 499–503.CrossRefGoogle Scholar
Rooke, J. A., Greife, H. A. and Armstrong, D. G. 1983. The digestion by cattle of grass silages made with no additive or with the application of formic acid or formic acid and formaldehyde. Grass and Forage Science 38: 301–310.CrossRefGoogle Scholar
Ross, G. J. S. 1980. MLP: Maximum liklihood program. Rothamsted Experimental Station. Harpenden, Hertfordshire.Google Scholar
Siddons, R. C., Nolan, J. V., Beever, D. E. and MacRae, J. C. 1985. Nitrogen digestion and metabolism in sheep consuming diets containing contrasting forms and levels of N. British Journal of Nutrition 54: 175–187.CrossRefGoogle ScholarPubMed
Thomas, P. C. 1983. Utilization of conserved forages. In Forage Protein in Ruminant Animal Production (ed. Thomson, D. J., Beever, D. E. and Gunn, R. G.), Occasional Symposium, British Society of Animal Production, No. 6, pp. 67–76.Google Scholar
Thomas, P. C., Chamberlain, D. G., Kelly, N. C. and Wait, M. K. 1980. The nutritive value of silages. Digestion of nitrogenous constituents in sheep receiving diets of grass silage and barley. British Journal of Nutrition 43: 469–479.CrossRefGoogle ScholarPubMed
Thomas, P. C., Kelly, N. C., Chamberlain, D. G. and Wait, M. K. 1980. The nutritive value of silages. Digestion of organic matter, gross energy and carbohydrate constituents in the rumen and intestines of sheep receiving diets of grass silage or grass silage and barley. British Journal of Nutrition 43: 481–489.CrossRefGoogle ScholarPubMed
Udén, P., Colucct, P. E. and Van Sohst, P. J. 1980. Investigation of chromium, cerium and cobalt as markers in digesta. Rate of passage studies. Journal of the Science of Food and Agriculture 31: 625–632.CrossRefGoogle ScholarPubMed