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    Brask, M. Lund, P. Hellwing, A.L.F. Poulsen, M. and Weisbjerg, M.R. 2013. Enteric methane production, digestibility and rumen fermentation in dairy cows fed different forages with and without rapeseed fat supplementation. Animal Feed Science and Technology, Vol. 184, Issue. 1-4, p. 67.


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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

  • D. T. Juniper (a1), E. M. Browne (a1), M. J. Bryant (a1) and D. E. Beever (a1)
  • DOI: http://dx.doi.org/10.1017/S1751731108001857
  • Published online: 01 June 2008
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.

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E-mail: d.t.juniper@reading.ac.uk
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BH Brier 1999. Regulation of protein and energy metabolism by the somatotrophic axis. Domestic Animal Endocrinology 17, 209218.

JJ Bass , GSG Spencer , SC Hodgkinson 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. 175195. Butterworth-Heinemann, Oxford.

EM Browne , DT Juniper , MJ Bryant , DE Beever 2005. Apparent digestibility and nitrogen utilisation of diets based on maize and grass silage fed to beef steers. Animal Feed Science and Technology 119, 5568.

MJ Cecava 1995. Rumen physiology and energy requirements. In Beef cattle feeding and nutrition, 2nd edition (ed. TW Perry and MJ Cecava). Academic Press, London, UK.

JW Cone , W ClineThiel , A Malestein , AT van’t Klooster 1989. Degradation of starch by incubation with rumen fluid. A comparison of different starch sources. Journal of the Science of Food and Agriculture 49, 173183.

EJ DePeters , SJ Taylor 1985. Effects of feeding corn or barley on composition of milk and diet digestibility. Journal of Dairy Science 68, 20272032.

SE Echternkamp , LJ Spicer , KE Gregory , SF Canning , JM Hammond 1990. Concentrations of insulin like growth factor-1 in blood and ovarian follicular fluid of cattle selected for twins. Biology of Reproduction 43, 814.

JC Elizalde , NR Merchen , DB Faulkner 1999. Supplemental cracked corn for steers fed fresh Alfalfa: I. Effects on digestion of organic matter, fiber and starch. Journal of Animal Science 77, 457466.

TH Elsasser , TS Rumsy , AC Hammond 1989. Influence of diet on basal and growth hormone stimulated plasma concentrations of IGF-1 in beef cattle. Journal of Animal Science 67, 128141.

NC Friggens , JD Oldham , RJ Dewhurst , G Horgan 1998. Proportions of volatile fatty acids in relation to the chemical composition of feeds based on grass silage. Journal of Dairy Science 81, 13311344.

IC Hart , DS Flux , P Andrews , AS McNeilly 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, 3540.


L Kung , RS Tung , BR Carmean 1992. Rumen fermentation and nutrient digestion in cattle fed diets varying in forage and energy source. Animal Feed Science and Technology 39, 112.


DR Mertens , JR Loften 1980. The effect of starch on fiber digestion kinetics in vitro. Journal of Dairy Science 63, 14371446.

FL Mould , ER Orskov , SO Mann 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, 1530.

TR Overton , MR Cameron , JP Elliot , JH Clark , DR Nelson 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, 19811998.

CK Reynolds , GB Huntington , TH Elsasser , HF Tyrell , PJ Reynolds 1989. Net metabolism of hormones by portal drained viscera and liver of lactating Holstein cows. Journal of Dairy Science 72, 14591468.

PH Robinson , S Tamminga , AM van Vuuren 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, 1935.

JD Sutton 1985. The digestion and absorption of energy substrates in the lactating dairy cow. Journal of Dairy Science 68, 33763393.

JD Sutton , SB Cammell , RH Phipps , DE Beever , DJ Humphries 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, 391400.

CB Theurer 1986. Grain processing effects on starch utilization by ruminants. Journal of Animal Science 63, 16491662.

CL Thorp , ARG Wylie , RJW Steen , C Shaw , JD McEvoy 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, 93109.


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