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21 Cards in this Set

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  • Back
Animals very susceptible to gossypol toxicity:
Young Ruminants (especially young Holsteins), rabbits, guinea pig,
Signsof gossypol toxicosis:
related to cardiac, hepatic, renal and reproductive systems(causes decreased libido)
Should not feed diets with more than ___ ___ “free gossypol”
100 ppm
So, if there is “free gossypol” there has to be some gossypol in the CS meal that is “_____”
Gossypol will bind to:
During processing of CS meal heating the meal causes gossypol to bind to proteins and this makes gossypol unavailable
Free gossypol will also bind to iron and lysine
__________ ___ ____ ____ ____ _______ is a treatment that will prevent gossypol from causing harm to the animals
supplementing the diet with iron sulfate
Iron to free gossypol ratio
Pig, broiler, layer, ruminant
Pig 1:1
Broilers 2:1
Layers 4:1
Ruminants 1:1
gossypol causes the egg yolk to:
turn green with storage
Total Digestible Nutrients (TDN):
an estimation of digestible ENERGY
energy is from:
carb, lipid protein
How is digestibility determined?
Digestibility trials
Why multiply EE by 2.25?
lipids have 2.25 Xs the amount of energy as other sources of energy
How many Kcal/gm in each energy source?
Lipid: 9 Kcal/gm
Carb/ Protein: 4 Kcal/gm
“Digestibility Trial”
A)animals fed individual crates or pens
B)feed intake measured and recorded
C)fecal excretion measured and recorded
D)calculate apparent digestability
In vivo:
in the animal
In vitro:
in glass/ in the lab
Calculating digestibility
Information required:
1.feed consumption
2.nutrient % of feed
3.fecal excretion amount
4.nutrient % in feces
Apparent digestibility:
Endogenous losses are ignored
Endogenous things:
The things that were in the feces that were not in the feed
True Digestibility:
endogenous losses are accounted for
Endogenous losses:
sloughed off intestinal cells, digestive juices, microbial cells