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Ruminal degradability of dry matter and neutral detergent fibre of grasses

Author

Listed:
  • F. Jančík

    (Institute of Animal Science, Prague-Uhříněves, Czech Republic)

  • V. Koukolová

    (Institute of Animal Science, Prague-Uhříněves, Czech Republic)

  • P. Homolka

    (Institute of Animal Science, Prague-Uhříněves, Czech Republic)

Abstract

A study was conducted (I) to determine rumen degradability (in sacco) of dry matter (DM) and neutral detergent fibre (NDF) of the most important grass species grown in the Czech Republic, (II) to compare grass species (n = 5) according to calculated degradation parameters, and (III) to establish prediction equations for degradation parameters from chemical composition. Forty samples of the most important grass species (Dactylis glomerata, Phleum pratense, Lolium perenne, Festuca arundinacea, Felina hybrid) were harvested in 2004 and 2005 and analyzed for chemical composition, and DM and NDF in sacco degradability. Results from the in sacco method were used to calculate DM and NDF degradation parameters. Linear and stepwise multiple regression analyses were used to develop prediction equations for DM and NDF degradation parameters from nutrient concentrations. The highest DM and NDF degradation parameters were found for Lolium perenne. DM and NDF rumen degradation parameters were successfully predicted from chemical composition, with a single predictor adequate for most parameters. For all parameters R2-values increased with addition of more predictors into regression equations. Effective degradability (ED) of DM calculated at a rumen outflow rate (k) of 0.05 h-1 was the best predicted by NDF (R2 = 0.878), and ED of NDF at k = 0.02 h-1 by crude protein (CP) (R2 = 0.653).

Suggested Citation

  • F. Jančík & V. Koukolová & P. Homolka, 2010. "Ruminal degradability of dry matter and neutral detergent fibre of grasses," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(9), pages 359-371.
    • Handle: RePEc:caa:jnlcjs:v:55:y:2010:i:9:id:211-2009-cjas
    DOI: 10.17221/211/2009-CJAS
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    References listed on IDEAS

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    1. P. Homolka & J. Harazim & J. Třináctý, 2007. "Nitrogen degradability and intestinal digestibility of rumen undegraded protein in rapeseed, rapeseed meal and extracted rapeseed meal," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 52(11), pages 378-386.
    2. P. Homolka & V. Koukolová & Z. Němec & Z. Mudřík & B. Hučko & J. Sales, 2008. "Amino acid contents and intestinal digestibility of lucerne in ruminants as influenced by growth stage," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(12), pages 499-505.
    3. A. Kamalak & O. Canbolat & Y. Gurbuz & O. Ozay, 2005. "Comparison of in vitro gas production technique with in situ nylon bag technique to estimate dry matter degradation," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 50(2), pages 60-67.
    4. D. Jalč & A. Lauková & M. Simonová & Z. Váradyová & P. Homolka, 2009. "The use of bacterial inoculants for grass silage: their effects on nutrient composition and fermentation parameters in grass silages," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(2), pages 84-91.
    5. R.G. Ramírez & H. González-Rodríguez & R. Morales-Rodríguez & A. Cerrillo-Soto & A. Juárez-Reyes & G.J. García-Dessommes & M. Guerrero-Cervantes, 2009. "Chemical composition and dry matter digestion of some native and cultivated grasses in Mexico," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(4), pages 150-162.
    6. F. Jančík & P. Homolka & B. Čermák & F. Lád, 2008. "Determination of indigestible neutral detergent fibre contents of grasses and its prediction from chemical composition," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(3), pages 128-135.
    7. A. Sommer & M. Vodňanský & P. Petrikovič & R. Požgaj, 2005. "Influence of lucerne and meadow hay quality on the digestibility of nutrients in the roe deer," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 50(2), pages 74-80.
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    1. P. Homolka & V. Koukolová & M. Podsedníček & A. Hlaváčková, 2012. "Nutritive value of red clover and lucerne forages for ruminants estimated by in vitro and in vivo digestibility methods," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 57(10), pages 454-468.

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