Copyright © National Academy of Sciences. All rights reserved. Nutrient Requirements of Swine: Eleventh Revised Edition: Model User Guide
12 For
Growing-Finishing Pigs
, carcass evaluation parameters can be altered by clicking on
Carcass Evaluation Options
. Matching observed performance with model-predicted performance is an iterative process i.e., by manually altering values for the adjustments, rerunning the model,
and comparing newly predicted performance with observed performance until reasonable agreement is achieved.
Feeding Programs
The module,
Feeding Program Diet Formulation,
can be accessed from the
Main Menu
, by selecting
Yes
following
Do you wish to evaluate a feeding program
? and clicking on
Review Feeding Programs
. This part of the program contains three tables ingredients, diets, and feeding programs and has four submodules that are used to 1 select ingredients, 2 formulate
diets, 3 review and edit the diet table, and 4 create feeding programs Figure A-6. Navigation among these submodules is accomplished by buttons at the top of the screen.
When a feeding program is selected, the dietary contents of energy and fermentable fiber as specified in diets in feeding programs are used to estimate nutrient requirements of
Growing- Finishing Pigs
,
Gestating Sows
, and
Lactating Sows
. In this case, specific feeding programs are chosen in the section
Inputs
of each of these models Figure A-4a.
1. Select Ingredients
In this submodule, the data-entry fields under the heading
Ingredient
are used to access a drop-down menu that lists feed ingredients included in the ingredient library, which is taken
from Chapter 17 in
Nutrient Requirements of Swine
NRC, 2012; click on
Ingredient Library
to review its content.
2
2
In the ingredient library fermentable i.e., apparent fecal digestible fiber is included as an additional characteristic of ingredients. This characteristic is not included in NRC 2012 and is required to estimate fermentative threonine
losses and thus to estimate threonine requirements, as outlined in Chapter 8 of Nutrient Requirements of Swine NRC, 2012. Estimates for this characteristic were obtained from CVB 2004.
Copyright © National Academy of Sciences. All rights reserved. Nutrient Requirements of Swine: Eleventh Revised Edition: Model User Guide
13 FIGURE A-6 Feeding program within the Feeding Program Diet Formulation module.
After a feed ingredient has been selected and loaded, its nutrient profile may be reviewed and altered by changing values in columns F to BT
3
. Values that are changed are highlighted in a different color. Special attention should be given to values that are in blue font; these are
consistent with the nutrient systems that are specified on the
Main Menu
. Additional ingredients may be entered in the database by typing a new ingredient name in column D and entering the
appropriate nutrient levels in the relevant columns. The first ingredient in the ingredient list is used as the residual feed ingredient that must be included in all diets and is used to ensure that
3
The headings present the nutrients according to 1 nutrients that are selected according to nutrient systems columns F to T; 2 nutrient that are independent of nutrient systems columns U to AA; and 3 nutrients based
on each of the three nutrient systems for energy columns AB to AD, crude protein and amino acids columns AE to BQ, and phosphorus columns BR to BT. Values in white cells can be changed. In columns U to BT, values
with blue font are those that are relevant to the nutrient system that is selected e.g., ME, SID amino acids, and STTD phosphorus, and these values are duplicated in columns F to T.
Copyright © National Academy of Sciences. All rights reserved. Nutrient Requirements of Swine: Eleventh Revised Edition: Model User Guide
14 the inclusion levels of all feed ingredients totals 100. Once ingredients are included in diets
they cannot be replaced by other ingredients in the database. To replace
Corn, Yellow Dent
as the residual ingredient in the original version of the program, all diets and feeding programs must be
deleted. Ingredients can be removed from the database by using the drop-down menu and selecting
Clear
at the bottom of the list. A maximum of 50 ingredients can be included in the database.
2. Formulate Diet
