A BRIEF INTRODUCTION TO
THE WUFFDA PROGRAM
LECTURE AND TURORIAL
FOR CHAPTER 25
FEED FORMULATION :
MULTIBLENDING
POULTRY NUTRITION
FUNDAMENTALS
Chapter 25
Section I.
INTRODUCTION
FORMULATION PROBLEM:
HOW TO USE A LIMITED
AMOUNT OF ONE
INGREDIENT?
1. FORMULATE ALL POSSIBLE DIETS
WITH THE INGREDIENT AND
COMPARE COSTS?
2. MULTI-BLEND, ONE PROBLEM WITH
ALL THE FEEDS, SOLVING FOR THE
LEAST-COST SOLUTION?
Chapter 25
Section I I.
CHOOSE THE FEEDS AND
COSTS TO WORK WITH
CHOOSE TWO DIETS, PREFERABLY ONES
NOT SIMILAR IN PROTEIN AND ENEGRY
X
X
CHOOSE A COST SERIES TO USE
X
ENTER THE
INGREDIENT
COMPOSITION FOR
YOUR FEEDS
ENTER THE
NUTRIENT
MINIMUMS AND
MAXIMUMS FOR THE
FEED
SOLVE THE PROBLEM
CHOOSE THE SENSITIVITY
REPORT BEFORE CHOOSING “OK”
CALCULATE THE
SHADOW PRICE OF
POULTRY MEAL AS
IN CHAPTER 24
=F10-H10
PRINT THE “FEED
SPEC” SPREADSHEET
& WRITE DOWN THE
SHADOW PRICE OF
POULTRY MEAL
ENTER THE
RESULTS IN THE C25
GRAPHING.XLS
SPREADSHEET
CONTINUE THE
PARAMETRIC
ANALYSIS AS IN
CHAPTER 24,
ENTERING DATA IN
THE GRAPHING
SPREADSHEET AS
YOU GO
REPEAT THE ANALYSIS FOR THE OTHER
FEED, WHEN FINISHED, YOUR CHART
SHOULD BE SIMILAR TO THIS. PRINT IT.
Chapter 25
Section III.
MULTI-BLENDING: ONE
INGRERDIENT INTO TWO FEEDS
FOR THE MULTI-BLENDING PROBLEM,
START WITH THE INGREDIENT MATRIX
FROM ONE OF YOUR FEEDS & ADD ROWS
AND COLUMNS FOR THE OTHER FEED
USE TABLE 25-5 AS A GUIDE
GIVE DIFFERENT SUBSCRIPTS FOR EACH
DIET. IN THIS EXAMPLE (B) WAS USED FOR
THE BROILER DIET AND (L) FOR THE LAYER
DIET
IN THE ‘WEIGHT COLUMN’ (FOR THE ENTIRE
MIXTURE) ENTER ‘0.5’ FOR EACH NUTRIENT
THE VALUE FOR WEIGHT (A) SHOULD BE
‘1’IN FEED (A) INGREDIENTS AND WEIGHT
(B) SHOULD BE ‘1’IN FEED (B)
INGREDIENTS
ADD A COLUMN NAMED ‘POULTRY MEAL
ACTIVITY’ WITH VALUES OF ‘1’ FOR THE
POULTRY MEALS, BUT ‘0’ FOR THE OTHER
INGREDIENTS
ADD THE NUTRIENT RESTRICIONS FOR
EACH FEED. ENTERING THESE LIMITS FOR
POULTRY MEAL ACTIVITY FIXES IT AT A
TOTAL OF 5% IN THE FEEDS
SOLVE THE PROBLEM & PRINT
YOUR RESULTS
ALL THE POULTRY MEAL SHOULD APPEAR
IN THE FEEDS, AND ADD UP TO 5%
ADD CALCULATIONS TO
TOTAL THE COST OF
EACH FEED IN ADDITION
TO THE TOTAL FORMULA
COST.
=SUMPRODUCT(C8:C14,E8:E14)/100
=SUMPRODUCT(C15:C21,E15:E21)/100
NEXT, FORCE 5%
POULTRY MEAL INTO THE
FEED IT WAS NOT USED
IN BEFORE, AND
RESOLVE THE PROBLEM.
1. SOLVE THE PROBLEM
2. PRINT YOUR RESULTS
3. WRITE A SHORT EXPLAINATION OF
YOUR RESULTS
4. ANSWER THE QUESTIONS IN THE
LABORATORY EXERCISES SECTION
FEED FORMULATION :
PARAMETRIC PROGRAMMING
1. WRITE A SHORT EXPLAINATION OF
YOUR RESULTS AND TURN IT IN WITH
YOUR PRINT OUTS.
2. ANSWER THE QUESTIONS IN THE
LABORATORY EXERCISES SECTION.