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The need to complement in vitro gas production measurements with residue determinations from in sacco degradabilities to improve the prediction of voluntary intake of hays

  • M. Blümmel (a1) and P. Bullerdieck (a2)

The need to complement in vitro gas production measurements with residue determination is demonstrated by the recalculation and reassessment of published data on in vitro gas production, in sacco degradabilities and voluntary dry matter intake (DMI). The in sacco degradability — gas volume ratio was determined at 24 and 48 h of incubation, termed partitioning factor (PF) and combined with rate and extent parameters of in sacco degradability and in vitro gas production to predict DMI. In vitro gas production and in sacco degradability characteristics (a + b) and c as described by the equation y = a + b(1−ect) explained 0·373 and 0·668 respectively of the variation in DMI of 19 legume and grass hays. The complementation of gas production parameters by the PF24 increased the R2 value to 0·744 with PF24 accounting for 0·407 of the variation in DMI, the rate of gas production (c) for 0·218 and the extent of gas production (a + b) for 0·119 of the variation in DMI. As a single parameter, PF48 showed the highest correlation (R2 = 0·597) with DMI but the combination of PF4S with rate and extent of in sacco or in vitro gas production measurements did not improve the correlation further, probably due to an intercorrelation between rates of fermentation and PF4S. Hays which were degraded at faster rates had higher PF values indicating proportionally higher microbial yield and lower short-chain fatty acid production per unit substrate degraded. Generally, hays with high in sacco degradabilities but proportionally low gas production i.e. hays with high PF values showed higher DMI.

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Beuvink, J. M. W. and Spoelstra, S. F. 1992. Interactions between substrate, fermentation end products, buffering systems and gas production upon fermentation of different carbohydrates by mixed rumen microorganism in vitro. Applied Microbiology and Technology 37: 505509.
Blaxter, K. 1989. Energy metabolism in animal and man. Cambridge University Press.
Blümmel, M. and Ørskov, E. R. 1993. Comparison of in vitro gas production and nylon bag degradabilities of roughages in predicting feed intake in cattle. Animal Feed Science and Technology 40:109119.
Blümmel, M., Steingaß, H. and Becker, K. 1994. The partitioning of in vitro fermentation products and its bearing for the prediction of voluntary feed intake. Proceedings of the Society for Nutrition and Physiology 3:123.
Grovum, W. L. 1995. Mechanisms explaining the effect of short chain fatty acids on feed intake in ruminants-osmotic pressure, insulin and glucagon. In Ruminant physiology: digestion, metabolism, growth and reproduction (ed. Engelhardt, W. von, Leonhard-Marek, S., Breves, G. and Giesecke, D.), pp. 173191. Ferndinand Enke Verlag, Stuttgart.
Harrison, D. G. and McAllan, A. B. 1980. Factors affecting microbial growth yield in the reticulum rumen. In Digestive physiology and metabolism in ruminants (ed. Ruckebush, Y. and Thivend, P.), pp. 205225. MTP Press Lancaster, England.
Hespell, R. B. and Bryant, M. P. 1979. Efficiencies of rumen microbial growth: influence of some theoretical and experimental factors on YATP. Journal of Animal Science 49: 16401659.
Khazaal, K., Dentinho, M. T., Ribeiro, J. M. and Ørskov, E. R. 1993. A comparison of gas production during incubation with rumen contents in vitro and nylon bag degradabiiity as predictors of the apparent digestibility in vivo and the voluntary intakes of hays. Animal Production 57: 105112.
Khazaal, K., Dentinho, M. T., Ribeiro, J. M. and Ørskov, E. R. 1995. Prediction of apparent digestibility and voluntary intake of hays fed to sheep: comparison between using fibre components, in vitro digestibility or characteristics of gas production or nylon bag degradation. Animal Science 61:527538.
Kibon, A. and Ørskov, E. R. 1993. The use of degradation characteristics of browse plants to predict intake and digestibility by goats. Animal Production 57: 247251.
Kristensen, V. F. and Weisbjerg, M. R. 1990. New approach to feed evaluation for ruminants. A note to the meeting of the Nordic Working Group on Feed Evaluation in Iceland. August 12-13, 1990.
Leng, R. A. 1993. Quantitative ruminant nutrition — a green science. Australian Journal of Agricultural Research 44: 363380.
Preston, T. R. and Leng, R. A. 1987. Matching livestock production systems to available resources in the tropics and sub-tropics. Penambul Books, Armidale and CTA, Wageningen.
Statistical Analysis Systems Institute. 1988. SAS/STAT user's guide, version 6.1. Statistical Analysis Systems Institute Inc., Cary, NC.
Stouthamer, A. H. 1973. A theoretical study on the amount of ATP required for synthesis of microbial cell material. Antonie van Leeuwenhoek 39:545565.
Tempest, D. W. and Neijssel, O. M. 1984. The status of YATP and maintance energy as biological interpretable phenomena. Annual Review of Microbiology 38:459486.
Van Soest, P. J. 1994. Nutritional ecology of the ruminant. Second edition. Cornell University Press.
Van Soest, J. P. and Robertson, J. B. 1985. A laboratory manual for Animal Science 612. Cornell University.
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Animal Science
  • ISSN: 1357-7298
  • EISSN: 1748-748X
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