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Digestion, rumen fermentation and circulating concentrations of insulin, growth hormone and IGF-1 in steers fed diets based on different proportions of maize silage and grass silage

Published online by Cambridge University Press:  13 May 2008

D. T. Juniper ,
E. M. Browne ,
M. J. Bryant  and
D. E. Beever
D. T. Juniper*
Affiliation:
Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AR, UK
E. M. Browne
Affiliation:
Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AR, UK
M. J. Bryant
Affiliation:
Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AR, UK
D. E. Beever
Affiliation:
Department of Agriculture, The University of Reading, Earley Gate, Reading RG6 6AR, UK
*
E-mail: [email protected]
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Abstract

Replacing grass silage with maize silage results in a fundamental change in the ratio of structural to non-structural carbohydrates with commensurate changes in rumen fermentation patterns and nutrient utilisation. This study investigated the effects of feeding four forage mixtures, namely grass silage (G); 67 g/100 g grass silage + 33 g/100 g maize silage (GGM); 67 g/100 g maize silage + 33/100 g grass silage (MMG); maize silage (M) to four ruminally and duodenally canulated Holstein Friesian steers. All diets were formulated to be isonitrogenous (22.4 g N/kg DM) using a concentrate mixture. Dietary dry matter (DM) and organic matter (OM) digestibility increased with ascending maize silage inclusion (P < 0.1) whereas starch and neutral detergent fibre digestibility declined (P < 0.05). Ratio of non-glucogenic to glucogenic precursors in the rumen fluid increased with maize silage inclusion (P < 0.01) with a commensurate reduction in rumen pH (P < 0.05). Mean circulating concentrations of insulin were greatest and similar in diets MMG and GGM, lower in diet M and lowest in diet G (P < 0.01). There were no effects of diet on the mean circulating concentration of growth hormone (GH), or the frequency, amplitude and duration of GH pulses, or the mean circulating concentrations of IGF-1. Increasing levels of DM, OM and starch intakes with the substitution of grass silage with maize silage affected overall digestion, nutrient partitioning and subsequent circulating concentrations of insulin.

Keywords

grassinsulinmaizesilageVFA
Type
Full Paper
Information
animal , Volume 2 , Issue 6 , June 2008 , pp. 849 - 858
Copyright
Copyright © The Animal Consortium 2008

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References

Bass, JJ, Spencer, GSG, Hodgkinson, SC 1992. Nutritional control of the growth hormone axis. In The control of fat and lean deposition (ed. PJ Buttery, KN Boorman and DB Lindsay), pp. 175–195. Butterworth-Heinemann, Oxford.CrossRefGoogle Scholar
Beever, DE, Kellaway, RC, Thompson, DJ, MacRae, JC, Evans, CC, Wallace, AS 1978. A comparison of two non-radioactive digesta marker systems for the measurement of nutrient flow at the proximal duodenum of calves. Journal of Agricultural Science 90, 157–163.CrossRefGoogle Scholar
Brier, BH 1999. Regulation of protein and energy metabolism by the somatotrophic axis. Domestic Animal Endocrinology 17, 209–218.CrossRefGoogle Scholar
Browne, EM, Juniper, DT, Bryant, MJ, Beever, DE 2005. Apparent digestibility and nitrogen utilisation of diets based on maize and grass silage fed to beef steers. Animal Feed Science and Technology 119, 55–68.CrossRefGoogle Scholar
Cecava, MJ 1995. Rumen physiology and energy requirements. In Beef cattle feeding and nutrition, 2nd edition (ed. TW Perry and MJ Cecava). Academic Press, London, UK.Google Scholar
Cone, JW, ClineThiel, W, Malestein, A, van’t Klooster, AT 1989. Degradation of starch by incubation with rumen fluid. A comparison of different starch sources. Journal of the Science of Food and Agriculture 49, 173–183.CrossRefGoogle Scholar
Deaville, ER, Givens, DI 1995. Extent of variation in cell wall degradation of forages in ruminants. In Grassland into the 21st century: challenges and opportunities, pp. 250–252. British Grassland Society, Reading, UK.Google Scholar
DePeters, EJ, Taylor, SJ 1985. Effects of feeding corn or barley on composition of milk and diet digestibility. Journal of Dairy Science 68, 2027–2032.CrossRefGoogle ScholarPubMed
Downes, AM, McDonald, IW 1964. The chromium-51 complex of ethylenediamine tetraacetic acid as soluble rumen marker. British Journal of Nutrition 18, 153–162.CrossRefGoogle ScholarPubMed
Echternkamp, SE, Spicer, LJ, Gregory, KE, Canning, SF, Hammond, JM 1990. Concentrations of insulin like growth factor-1 in blood and ovarian follicular fluid of cattle selected for twins. Biology of Reproduction 43, 8–14.CrossRefGoogle ScholarPubMed
Elizalde, JC, Merchen, NR, Faulkner, DB 1999. Supplemental cracked corn for steers fed fresh Alfalfa: I. Effects on digestion of organic matter, fiber and starch. Journal of Animal Science 77, 457–466.CrossRefGoogle ScholarPubMed
Elsasser, TH, Rumsy, TS, Hammond, AC 1989. Influence of diet on basal and growth hormone stimulated plasma concentrations of IGF-1 in beef cattle. Journal of Animal Science 67, 128–141.CrossRefGoogle ScholarPubMed
Faichney, GJ 1975. The use of markers to partition digestion within the gastrointestinal tract of ruminants. In Digestion and Metabolism in the Ruminant (ed. IW McDonald and ACI Warner), pp. 277–291. University of New England Publishing Unit, Armidale, New South Wales, Australia.Google Scholar
Friggens, NC, Oldham, JD, Dewhurst, RJ, Horgan, G 1998. Proportions of volatile fatty acids in relation to the chemical composition of feeds based on grass silage. Journal of Dairy Science 81, 1331–1344.CrossRefGoogle Scholar
Hart, IC, Flux, DS, Andrews, P, McNeilly, AS 1975. Radioimmunoassay for ovine and caprine growth hormone: its application to the measurement of basal circulating levels of growth hormone in the goat. Hormone and Metabolic Research 7, 35–40.CrossRefGoogle Scholar
Juniper, DT, Browne, EM, Fisher, AV, Bryant, MJ, Nute, GR, Beever, DE 2005. Intake, growth and meat quality of steers given diets based on varying proportions of maize silage and grass silage. Animal Science 81, 159–170.CrossRefGoogle Scholar
Juniper, DT, Browne, EM, Bryant, MJ, Beever, DE 2006. Digestion, rumen fermentation and circulating concentrations of insulin, growth hormone and IGF-1 in steers given maize silages harvested at three stages of maturity. Animal Science 82, 41–48.CrossRefGoogle Scholar
Kung, L, Tung, RS, Carmean, BR 1992. Rumen fermentation and nutrient digestion in cattle fed diets varying in forage and energy source. Animal Feed Science and Technology 39, 1–12.CrossRefGoogle Scholar
MacRae, JC, Armstrong, DG 1968. Studies on intestinal digestion in sheep: digestion of some carbohydrate constituents in hay, cereal and hay rations. British Journal of Nutrition 23, 377–387.CrossRefGoogle Scholar
Merriam, GR, Wachter, KW 1982. Algorithms for the study of episodic hormone secretion. American Journal of Physiology 243, 310–318.Google Scholar
Mertens, DR, Loften, JR 1980. The effect of starch on fiber digestion kinetics in vitro. Journal of Dairy Science 63, 1437–1446.CrossRefGoogle ScholarPubMed
Ministry of Agriculture, Fisheries and Food 1983. The analysis of agricultural materials, MAFF reference book, 427. HMSO, London, UK.Google Scholar
Ministry of Agriculture, Fisheries and Food 1993. Prediction of the energy values of compound feeding stuffs for farm animals. MAFF Publications, London, UK.Google Scholar
Mould, FL, Orskov, ER, Mann, SO 1983. Associative effects of mixed feeds. I. Effects of type and level of supplementation and the influence of rumen fluid pH on cellulolysis in vivo and dry matter digestion of various roughages. Animal Feed Science and Technology 10, 15–30.CrossRefGoogle Scholar
Overton, TR, Cameron, MR, Elliot, JP, Clark, JH, Nelson, DR 1995. Ruminal fermentation and passage of nutrients to the duodenum of lactating dairy cows fed mixtures of corn and barley. Journal of Dairy Science 78, 1981–1998.CrossRefGoogle Scholar
Porter, MG, Patterson, DC, Steen, RWJ, Gordon, FJ 1984. Determination of dry matter and gross energy of grass silage. In Proceedings of the 7th Silage Conference on Silage Production and Utilization, Belfast (ed. A Hopkins and D Younie), pp. 160–162. Occasional Symposium No. 27. British Grassland Society, Harrogate, UK.Google Scholar
Reynolds, CK, Huntington, GB, Elsasser, TH, Tyrell, HF, Reynolds, PJ 1989. Net metabolism of hormones by portal drained viscera and liver of lactating Holstein cows. Journal of Dairy Science 72, 1459–1468.CrossRefGoogle ScholarPubMed
Robinson, PH, Tamminga, S, van Vuuren, AM 1987. Influence of declining level of feed intake and varying the proportion of starch in the concentrate on milk production and whole tract digestibility in dairy cows. Livestock Production Science 17, 19–35.CrossRefGoogle Scholar
Steen, RJW 1992. The effects of plane of nutrition and forage to concentrate ratio on the performance and carcase composition of steers. Animal Production 58, 442.Google Scholar
Steen, RJW, Robson, AE 1995. Effects of forage to concentrate ratio in the diet and protein intake on the performance and carcase composition of beef heifers. Journal of Agricultural Science 125, 125–135.Google Scholar
Sutton, JD 1985. The digestion and absorption of energy substrates in the lactating dairy cow. Journal of Dairy Science 68, 3376–3393.CrossRefGoogle Scholar
Sutton, JD, Cammell, SB, Phipps, RH, Beever, DE, Humphries, DJ 2000. The effect of crop maturity on the nutritional value of maize silage for lactating cows: 2. Ruminal and post-ruminal digestion. Animal Science 71, 391–400.CrossRefGoogle Scholar
Theurer, CB 1986. Grain processing effects on starch utilization by ruminants. Journal of Animal Science 63, 1649–1662.CrossRefGoogle ScholarPubMed
Thorp, CL, Wylie, ARG, Steen, RJW, Shaw, C, McEvoy, JD 2000. Effects of incremental increases in forage: concentrate ratio on plasma hormone and metabolite concentrations and products of rumen fermentation in fattening beef steers. Animal Science 71, 93–109.CrossRefGoogle Scholar