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The effect of crop maturity on the nutritional value of maize silage for lactating dairy cows. 2. Ruminal and post-ruminal digestion

Published online by Cambridge University Press:  18 August 2016

J. D. Sutton ,
S. B. Cammell ,
R. H. Phipps ,
D. E. Beever  and
D. J. Humphries
J. D. Sutton
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK
S. B. Cammell
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK
R. H. Phipps
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK
D. E. Beever
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK
D. J. Humphries
Affiliation:
Centre for Dairy Research, Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK
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Abstract

To evaluate the effect of crop maturity on digestion of maize silage in the rumen and post-ruminal digestive tract, four multiparous Holstein-Friesian cows fitted with a simple cannula in the proximal duodenum and a rumen cannula were offered four diets in a 4 ✕ 4 Latin-square design. Forage maize (cv. Hudson) was harvested and ensiled at target dry matter (DM) contents of 230, 280, 330 and 380 g per kg fresh weight (FW) to provide a range of starch contents. The mean values for volatile-corrected DM (VCDM) and starch content of the four maize silages as given were 221, 277, 308 and 372 g/kg FW and 173, 257, 328 and 382 g/kg VCDM respectively. Grass silage (GS) containing 250 g VCDM per kg FW was produced from the primary growth of a perennial ryegrass sward. The diets were 8·7 kg DM per day of a dairy concentrate supplement with one of four forage treatments offered ad libitum. The forage treatments were a 3 : 1 DM ratio of maize silage with GS, designated as T23, T28, T33 and T38. Each period lasted 6 weeks with rumen and duodenal samples being taken over 3 days in week 4 and faeces being collected in respiration chambers over 6 days in either week 5 or 6. Milk yield tended to increase with advancing maturity (30·5, 31·8, 32·5 and 32·3 kg/day) but individual treatment differences were not significant. DM intake increased from 19·62 to 21·30 kg/day (P < 0·05) but there were no significant effects on digestibility in the rumen, post-ruminal tract or total tract. Digestibility of neutral detergent fibre in the rumen declined with increasing starch content in the maize silage (P < 0·05) but total digestibility was not significantly affected. Starch intake increased from 3·11 to 5·04 kg/day (P < 0·001), duodenal flow from 0·40 to 0·89 kg/day (P < 0·01) and the amounts digested in the rumen and post-ruminal tract respectively from 2·72 and 0·34 kg/day to 4·16 and 0·71 kg/ day (P < 0·01). However the only significant effect on starch digestibility was a small fall in total digestibility from a mean of 0·981 for T23, T28 and T33 to 0·966 for T38. There were no treatment effects on nitrogen digestion. The molar proportions of acetic acid and n-caproic acid decreased and that of n-butyric acid increased with advancing maturity. It is concluded that the changes in composition of maize silage with increasing maturity result in large increases in the contribution of starch to DM digested in the rumen but only small differences in rumen fermentation. Post-ruminal starch digestion doubles but this is due to the increased starch concentration of the silage rather than major changes in digestion and the amount is small compared with that likely to result from feeding maize grain.

Keywords

maize silagedairy cowsdigestion
Type
Ruminant nutrition, behaviour and production
Information
Animal Science , Volume 71 , Issue 2 , October 2000 , pp. 391 - 400
Copyright
Copyright © British Society of Animal Science 2000

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References

Abdalla, A. L., Sutton, J. D., Phipps, R. H. and Humphries, D. J. 1999. Digestion in the rumen of lactating dairy cows given mixtures of urea-treated whole-crop wheat and grass silage. Animal Science 69: 203–212.Google Scholar
Cammell, S. B., Sutton, J. D., Beever, D. E., Humphries, D. J. and Phipps, R. H. 2000. The effect of crop maturity on the nutritional value of maize silage for lactating dairy cows. 1. Energy and nitrogen utilization. Animal Science 71: 381–390.Google Scholar
Faichney, G. J. 1975. The use of markers to partition digestion within the digestive tract of ruminants. In Digestion and metabolism in the ruminant (ed. McDonald, I. W. and Warner, A. C. I.), pp. 277–291. The University of New England Publishing Unit, Armidale.Google Scholar
Harrison, J. H., Johnson, L., Riley, R., Xu, S., Loney, K., Hunt, C. W. and Sapienza, D. 1996. Effect of harvest maturity of whole plant corn silage on milk production and component yield, and passage of corn grain and starch into faeces. Journal of Dairy Science 79: (suppl. 1) 149 (abstr.).Google Scholar
Nunan, T. 1997. The effect of stage of maturity on the ruminal degradation characteristics of maize silage. M.Sc. thesis, University of Reading.Google Scholar
Overton, T. R., Cameron, M. R., Elliott, J. P., Clark, J. H. and Nelson, D. R. 1995. Ruminal fermentation and passage of nutrients to the duodenum of lactating cows fed mixtures of corn and barley. Journal of Dairy Science 78: 1981–1998.Google Scholar
Philippeau, C. and Michalet-Doreau, B. 1996. Influence of maturity stage and genotype of corn on rate of ruminal starch degradation. Journal of Dairy Science 79: (suppl. 1) 138 (abstr.).Google Scholar
Phipps, R. H. 1996. A crop from over there that’s doing rather well over here: forage maize in the diet of the lactating dairy cow. Journal of the Royal Agricultural Society of England 157: 103–115.Google Scholar
Phipps, R. H., Sutton, J. D., Beever, D. E. and Jones, A. K. 2000. The effect of crop maturity on the nutritional value of maize silage for lactating dairy cows. 3. Food intake and milk production. Animal Science 71: 401–409.Google Scholar
Porter, M. G., Patterson, D. C., Steen, R. W. J. and Gordon, F. J. 1984. Determination of dry matter and gross energy of grass silage. Proceedings of the seventh silage conference, The Queen’s University, Belfast.Google Scholar
Reynolds, C. K., Sutton, J. D. and Beever, D. E. 1997. Effects of feeding starch to dairy cattle on nutrient availability and production. In Recent advances in animal nutrition — 1997 (ed. Garnsworthy, P. C. and Wiseman, J.), pp. 105–134. Nottingham University Press, Nottingham.Google Scholar
Sutton, J. D. 1985. The digestion and absorption of energy substrates in the lactating cow. Journal of Dairy Science 68: 3376–3393.Google Scholar
Sutton, J. D., Abdalla, A. L., Phipps, R. H., Cammell, S. B. and Humphries, D. J. 1997. The effect of the replacement of grass silage by increasing proportions of urea-treated whole-crop wheat on food intake and apparent digestibility and milk production by dairy cows. Animal Science 65: 343–351.Google Scholar
Sutton, J. D., Cammell, S. B., Beever, D. E., Humphries, D. J. and Phipps, R. H. 1998. Energy and nitrogen balance of lactating dairy cows given mixtures of urea-treated whole-crop wheat and grass silage. Animal Science 67: 203–212.Google Scholar
Visser, H. de. 1993. Characterisation of carbohydrates in concentrates for dairy cows. In Recent advances in animal nutrition 1993 (ed. Garnsworthy, P. C. and Cole, D. J. A.), pp. 19–38. Nottingham University Press, Nottingham.Google Scholar