Transcript person square - Cloudfront.net

PEARSON SQUARE
Balancing a Ration
4/7/2016
1
TDN



Total Digestible Nutrients
The sum of all digestible nutrients
The relative energy value of a feed
CP



Crude protein
The sum of all protein in a feed,
Including “not-true” proteins such as
amino acids, enzymes, certain vitamins,
urea, ammonia, etc.
DP


Digestible protein
The amount of protein in a feed
digested and used.
DM



Dry matter
The part of the feed that is not water
The sum of CP, CF, Crude Fiber, NFE,
and ash.
CF


Crude fat
All of the portion of the feed that is
soluble in ether. Referred to as ether
extract.
Pearson Square


Useful tool for simplifying and balancing
of rations
It shows the proportions or percentages
of two feeds to be mixed together to
give a percentage of the needed
nutrient
4/7/2016
7
Pearson Square
2000# of feed is needed to feed a 100#
growing hog.
 A feeding standards table shows that an
18% crude protein ration is needed.
 Corn and Soybean Meal (SBM) are
selected as feeds.
4/7/2016
8
Pearson Square

A feed composition table shows
Corn has 8.9% crude protein
SBM has 44.4% crude protein
4/7/2016
9
Pearson Square

How much corn and soybean meal need
to be mixed together for 2000# of
feed?
4/7/2016
10
Pearson Square
Step 1 -Draw a 1- to
2-inch square. Place
diagonal lines across
the square.
4/7/2016
11
Pearson Square

Step 2 – Write the
percentage of crude
protein needed by
the animal in the
center of the square
where the diagonal
lines cross
4/7/2016
18.0
12
Pearson Square

Step 3 –Write the
feeds to be used at
each corner. Place
the percent of crude
protein in the feeds
after the name of
the feed


18.0


4/7/2016
Corn
8.9%
SBM
44.4%
13
Pearson Square

Step 4 – Subtract
the smaller of the
numbers from the
larger numbers.
(This involves crude
protein needed by
the animal and that
provided by the
feed.) Write the
difference in the
opposite corners
4/7/2016
Corn
8.9 %
26.4 parts
corn

18.0


SBM
44.4%
9.1 parts
SBM
14
Pearson Square




Step 5 – The numbers at the two right
corners are parts of the two feed
ingredients that are needed.
26.4 parts corn
+9.1 parts soybean meal (SBM)
35.5 total parts
4/7/2016
15
Pearson Square


Corn
8.9%
26.4 parts corn
35.5 total parts
18.0


SBM
44.4%
9.1 parts SBM
35.5 total parts

4/7/2016
16
Pearson Square



Step 6 – The percentage of each feed
needed in the ration can be found by
dividing the number of parts by the
total parts, then multiply by 100.
26.4/ 35.5 = .744 x 100 = 74.4% corn
9.1/ 35.5 = .256 x 100 = 25.6% sbm
4/7/2016
17
Pearson Square


Corn
8.9%
26.4 parts corn
35.5 total parts
74.4%
18.0


SBM
44.4%
4/7/2016
9.1 parts SBM
35.5 total parts
25.6%
18
Pearson Square

Step 7 – The amount of each feed
ingredient for a large batch of feed is
determined by multiplying the
percentage of each by the total amount
of feed desired
4/7/2016
19
Pearson Square



Our batch of feed = 2000 # ( 1 ton)
2000# x .744 = 1488 # Corn
2000# x .256 = 512 # SBM
2000# of feed @ 18% Crude Protein
4/7/2016
20