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Flashcards in Digestibility Deck (6)
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1

How is apparent digestibility calculated in general terms?

(Intake - Output) / Intake

2

How is true digestibility calculated in general terms?

[Intake - (Output - microbial/endogenous output)] / Input

3

How is total digestible nutrients (TDN) calculated?

Digestible CP + digestible CHO + (2.25 x digestible ether extract)

4

What are the differences between the Tilley and Terry method and Jones and Hayward method of reproducing digestion in vitro?

T&T: Step 1 is treated with buffered rumen fluid from an animal donor, step 2 is treated with pepsin HCl
J&H: Step 1 is treated with pepsin HCl, step 2 is treated with cellolytic enzymes (Doesn't require live animals)

5

Do cows or sheep digest low quality roughage better?

Cows

6

Do cows or sheep digest cereal grains better?

Sheep