Digestibility - Department of Animal Sciences

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Problems with in vivo experiments Animal trials are: – Expensive – Protracted – Laborious – Public concerns – Animal stress ??? Must estimate nutritive value with less animal dependent techniques
Ideal in vitro methods should be: – Rapid (one step) & routinely practicable – Accurate – Cheap & not laborious – Repeatable & robust – Biologically meaningful – Broad-based (apply to all forage types) – Handle large nos. of samples – Laboratory-based
Page 1 and 2: DIGESTIBILITY
Page 3 and 4: In vivo digestibility methods Direc
Page 5 and 6: In vivo digestibility trials in met
Page 7 and 8: Total collection calculations Diges
Page 9 and 10: 2. Difference method Allows digy ca
Page 11 and 12: DMD (g/kg) Regression method 800 Ba
Page 13 and 14: Marker digestibility trials Particu
Page 15 and 16: Marker digestibility Pros - Total f
Page 17: Marker issues Difficulty of mixing
Page 21 and 22: Prediction of silage OMD in vivo fr
Page 23 and 24: Rumen fluid problems Analytical iss
Page 25 and 26: Rumen fluid technique - problems St
Page 27 and 28: Prediction of DMD in vivo from in v
Page 29 and 30: Relationships between DMD in vivo a
Page 31 and 32: Prediction of in vivo OMD of spring
Page 33 and 34: 14 C-Casein hydrolysis (mg/ml) 0.5
Page 35 and 36: The ANKOM equipment
Page 37 and 38: ANKOM pros & cons Pros - Simplifies
Page 39: Digestibility references Chapters 6

Digestibility - Department of Animal Sciences

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