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ANS 319 FINAL EXAM QUESTIONS AND ANSWERS
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ANS 319 FINAL EXAM QUESTIONS ANDANSWERS
Dry Matter - ANSWER Non-water component of feed; solids
As Fed - ANSWER The water component of feed; liquid
Why is it important to put things on a DM basis? - ANSWER Cost,
Nutritional Value and digestibility
1 gallon = how many litres? - ANSWER 3.78 liter
1 lbs= How many mg? - ANSWER 1000 mg
How do you calculate As Fed to DM? - ANSWER Nutrient % as fed/dm
content as a decimal
how do you calculate DM to As Fed Basis? - ANSWER Nutrient % DM*
DM content as a decimal
1 litre how many ml? - ANSWER 1000ml
To convert DM to As Fed in Grams? - ANSWER As fed * Dm content
as decimal
To convert As Fed to DM? - ANSWER DMg /DM content as decimal
1 kg= how many lbs? - ANSWER 2.2lbs
Key difference between plants and animals? - ANSWER
photosynthesis
Concentrates? - ANSWER contain high concentrations of digestible
energy per unit weight and volume
Rouhgages - ANSWER defined by the fraction of cell wall
,forages - ANSWER leaves and stems of grasses, legumes, brassicas
Grains - ANSWER seeds of cereals and oil seed plants
Roots, Tubers - ANSWER turnips, beets, potatoes
Byproducts - ANSWER cereal seed coats, oil seed meals
most cultivated forages are classified into what two families? -
ANSWER Grasses and Legumes
Grasses - ANSWER bluegrass, foxtail, sorghum are some examples
legumes - ANSWER alfalfa, vetch, birdsfoot, and crimson clover are
some examples
nodules - ANSWER root swellings composed of plant cells that contain
nitrogen-fixing bateria
nitrogen-fixing bacteria - ANSWER supply nitrogenouse minerals in teh
soil by converting N2 to NH3 (ammonia)
What part of the plant is higher in structal carbohydrates? - ANSWER
stem of the plant
inflorescence - ANSWER flower part of the plant; less important as a
fed component
Apparent Digestibility % = what? - ANSWER dietary intake-feces output
* 100/ dietary intake
What are the two main approaches to the assessment of nutritive value
of feeds? - ANSWER Laboratory or animal assessment
Laboratory assessment involves these two steps? - ANSWER chemical
evaluation and in vitro deigestion
Detergent system was created by? - ANSWER Van Soest
, NDF - ANSWER process that involves a neutral detergent that
dissolves plant pectins, proteins, sugars and lipids
Why do plants produce NDF? - ANSWER Protection, structure, and
metabolic fuction
NDF and ADF are both parts of what assessment? And what part of that
section would it be under? - ANSWER Laboratory assessment and
chemical evaluation
In Vitro Digestion does what? - ANSWER stimulates rumen and gastric
digestion
NDF does what? - ANSWER recovers major plant cell wall components
and removes all other organic constituents
ADF does what? - ANSWER recovers cellulose, lignin and lignin-N
complexes and removes hemi cellulose and fiber bound protien
ADF=What? - ANSWER Acid Detergent fraction
what are the 3 main approaches to animal assessment? - ANSWER
digestion, balance, and production trial
Digestion Trial involves? - ANSWER individual feeding, quantitative
feces collection, 5 or more animals, 7 or more days, minimal disruption
of feed intake
Balance trial involves? - ANSWER Same as Digestion, plus the
measurements of urinary losses
Balance Trial Formula? - ANSWER N balance= N intake- (fecal N+
Urinary N)
Production Trial involves - ANSWER 1. titrate maximal or optimal
response to: total feed intake and intake of specific nutrients
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