Ration
Formulation
-
Economically matching the animal’s
nutrient requirements with
the available
feeds
a. palatability
b. physical form of ration
c. factors affecting feed
consumption
Grower
Diet 1.08% lysine
Requirements
for 75 lb animals
Ca - .59%
Total P - .51%
Avail P - .23%
Pearson Square
Let’s
use Corn (9.1% CP) and SBM (45.7% CP) to balance the diet.
Which
other nutrients are we missing?
Ca, P, NaCL, TM & Vitamins
If
we are working on a 100% basis, and leave these out, when they are added, what
happens to the concentration of the remaining ingredients?
Specie Intake Differences:
Swine – eat to meet their energy requirements
-
add fiber to diet
(what happens to intake)
-
add fat (what
happens?)
Ruminants
– eat until they are full
- distention of GI tract
-
calculated on a
Dry Matter (DM) basis
-
Typically 2-3.5%
of BW in DM/d
o
Beef or dairy –
different
-
Consume
forage/roughage high in water
o
Therefore can’t
calculate intake on a straight pound/kg basis
o
Feed 16 lbs of
Corn Silage (35%DM) How many lbs of DM
did it eat?
Formulating Diets:
Things to consider.
What livestock are you feeding (affects Feed Intake)
What stage are they in (growth/lactation/gestation)
What feeds are you going to use?
What are their limiting factors?
Salt, minerals, ash, anti-nutritional factors
- Feeding for carcass -
*protein accretion curves
·
intake
differences
o
Weather
o
Gender
o
Feeder space, pen
design, space