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