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Prediction of Digestibility and Intake of Sheep Fed Leguminosae or GRAMINAE Hays: Comparison Between the in Vitro Digestibility, Kinetics of Gas Production or Dry Matter Degradation

Published online by Cambridge University Press:  21 November 2017

M.T. Dentinho ,
K. Khazaal ,
J.M. Ribeiro  and
E.R. Ørskov
M.T. Dentinho
Affiliation:
Estacao Zootecnica Nacional, Departmento de Nutricao, Santarem, Portugal
K. Khazaal
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB, Scotland, UK
J.M. Ribeiro
Affiliation:
Estacao Zootecnica Nacional, Departmento de Nutricao, Santarem, Portugal
E.R. Ørskov
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB, Scotland, UK
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Extract

By using separated values of kinetics of in situ dry matter (DM) degradation or in vitro gas production (Menke and Steingass, 1988) of leguminosae hays, Khazaal et al, (1993) reported high correlation with intake (r= 0.88; r= 0.79) and in vivo DM digestibility (DMD) (r= 0.94; r= 0.88). The aim of the present study was to extend the range of samples used and compare the ability of the 2 stages in vitro digestibility (Tilley and Terry, 1963), the in situ DM degradation or the gas production techniques to predict daily intake (g DM/ kgW0.75) and in vivo DM digestibility (DMD) of 19 leguminous and graminaceous hays fed to sheep.

Three harvesting stages (early bloom EB, mid bloom MB or in seed IS) made from lucerne (Medicago sativa), sweet clover (Melilotus segetalis), Persian clover (Trifolium resupinatum), Rye (Secale cereale), Triticale (Triticale hexaploid), oat (Avena stativa) and a pre-bloom (PB) Italian ryegrass (Lolium multiflorum ). Each hay was fed ad libitum to 4 Merino male sheep and their intake and in vivo DMD recorded. Gas production (ml/ 200 mg DM) or in situ DM degradation (g/ 100 g DM) were determined as described by Khazaal et al, (1993) after 6, 12, 24, 48, 72 or 96 h incubation. Measured gas production or DM degradation values were fitted to the equation p=a+b(l-e-ct)(McDonald, 1981) where p is gas production or DM degradation at time t and a, b and c are constants. For nylon bag the washing loss (soluble fraction) was defined as A, the insoluble but fermentable matter was defined as B=(a+b)-A, and c is the rate of fermentation or degradation (Ørskov and Ryle, 1990).

Type
Ruminant Nutrition and Digestion
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1994 , March 1994 , pp. 103
Copyright
Copyright © The British Society of Animal Production 1994

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References

Blumell, M and Orskov, E.R (1993). Animal Production. 40:109–119.Google Scholar
Khazaal, K., Dentinho, M.T., Ribeiro, R., Ørskov, E.R. (1993). Animal Production. 57:105–112.Google Scholar
McDonald, I.(1981). Journal of Agricultural Science Cambridge. 96: 251–252.Google Scholar
Menke, K.H. and Steingass, H. (1988). Animal Research and Development. Vol 28: 7–55.Google Scholar
Ørskov, E.R. and Ryle, M. (1990). Editors. Energy Nutrition in Ruminants. Chapter 10.Google Scholar
Tilley, J.M.A. and Terry, R.A. (1963). Journal of the British Grassland Society 18: 104–111.Google Scholar