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Effect of days of regrowth of ryegrass (Lolium perenne) on fermentation characteristics: comparison of the nylon bag and gas production techniques

Published online by Cambridge University Press:  27 February 2018

P. Chilibroste
Affiliation:
Wageningen Institute of Animal Science, Animal Nutrition, PO Box 338 6700 AH, Wageningen, The Netherlands
S. Tamminga
Affiliation:
Wageningen Institute of Animal Science, Animal Nutrition, PO Box 338 6700 AH, Wageningen, The Netherlands
B. A. Williams
Affiliation:
Wageningen Institute of Animal Science, Animal Nutrition, PO Box 338 6700 AH, Wageningen, The Netherlands
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The nylon bag technique (NBT) has been used widely to characterize the washable (W), insoluble potentially degradable (D) and insoluble non-degradable (U) fractions of grasses (e.g. van Vuuren, 1993) and concentrates (Tamminga et al., 1990). Recently the gas production technique (GPT) has been proposed as a method to evaluate the fermentation characteristics of different foods (Theodorou et al., 1994). Both techniques have shown good correlation with dry matter intake (Khazaal et al., 1993). One of the potential advantages of GPT over NBT is the ability to differentiate fermentation patterns (Groot et al., 1996) that might be related to changes in food composition. This trial was part of a larger grazing experiment and aimed to compare GPT and NBT when applied to samples of ryegrass at different ages. A specific objective was to determine whether or not GPT could extract more information concerning the fermentation patterns of different ryegrass fractions and how these patterns changed as a result of plant maturity.

Type
Overview of the in vitro technique
Copyright
Copyright © British Society of Animal Science 1998

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References

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Effect of days of regrowth of ryegrass (Lolium perenne) on fermentation characteristics: comparison of the nylon bag and gas production techniques
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