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Nutrient manager

Nutrient manager uses an Explorer-type tree to organise information. This set-up is entirely user controlled, with the usual right-click options (new, delete, rename etc.) being available. Both folders and items within folders can be sorted according to a user-defined alpha-numeric sort order. This order, once set, is available in all working windows of the program. There is no restriction on the number of nutrients that can be entered into the database. It is possible also to specify whether or not the nutrient has an associated digestibility, allowing the user to work with either total or digestible nutrient concentrations. Default bounds and some information about a nutrient is also stored.

Screenshot of tab managing nutrient concentrations

It is possible to set up more than one digestibility group, allowing a different digestibility value to be entered for each animal.

Screenshot of Nutrients tab for ingredient concentrations and digestibilities

WinFeed also allows the user to create nutrients defined as ratios of other nutrients. The ratios are automatically updated when the parent values are changed. The digestibility values are correctly maintained if the parent values have digestibilities.

Nutrients may also be created and then defined as linear expressions of other nutrients. A simple example would be to define total essential amino acids as the sum of the individual values. More complex expressions may be used to calculate the net energy values of ingredients. These calculations may also include digestibility values.

Screenshot of Nutrients tab where expressions are added

The calculations may apply to all values of a nutrient (e.g. the effective energy content of an ingredient), or to the value in a single nutrient/ingredient cell. This latter facility allows amino acid contents in an ingredient to be expressed in terms of the protein content of the ingredient, these expressions being different for each amino acid in each ingredient. As the protein content of the ingredient is changed by the user, so the amino acid contents would be changed accordingly.

WinFeed > Features

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Help Section

  • Introduction
  • WinFeed
    • Features
      • Feed Templates
      • Compositions
      • Ingredient Manager
      • Client Manager
      • Animal Manager
      • Digestibility Groups
      • Reporting System
    • Basic Screen and Editing Concepts
      • Saving Screen Space
      • Sorting
      • Tables
      • Editing using the Tree Structure
      • The WinFeed User Interface
    • Data Handling using WinFeed Data Manager
      • Making Backups of your Data
      • Using WinFeed Data Manager to maintain your data
      • General data storage information
    • Formulation
      • Brief background to feed formulating
      • Client feeds
      • Formulating a feed with WinFeed
      • Sensitivity values, marginal costs and included prices
      • Parametrics
      • Formulating with weight constraint <> 1
      • Formulating using dry matter
      • Rounding and Animal Feed Calculations
    • General
      • Units
      • Setting the dry matter nutrient
      • Abbreviations used for amino acid names
      • Security key
  • EFG Broiler model
    • Theory
      • Introduction to the EFG Broiler model
      • Theory of growth
      • Determining the genetic growth parameters
      • Features to be aware of when using the model
      • References
    • Model Inputs
      • EFG Broiler Model basic screen layout
      • Defining a breed
      • Management
      • Economics
      • Environment
      • Restricted Feeding
      • Revenue
      • Cropping schedule
      • Feeding schedule
      • Stocking schedule
      • Daily Blend %
    • Experiments
      • Flocks section
      • Solving an experiment
      • Flocks
      • Setting multiple values for a variable in a flock
      • How to design a flock
    • Results
      • Results Tables
      • Report basics
      • Economics summary report
      • Potential growth data
      • Summary reports by time, weight or feed
      • Component graphs
      • Viewing a graph
      • Amino acid requirements
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    • General
      • BM Feeds
      • Growth constraint
      • Editing a histogram
      • Troubleshooting the broiler model
      • Units – broiler model
  • EFG Broiler Optimiser
    • Optimisations available
      • Optimising amino acid contents in each feed
      • Optimising nutrient density
      • Optimising the feeding schedule
    • Performing an Optimisation
      • Inputs
      • Flocks (optimiser)
      • Comparison of the numerical and grid methods
      • Response modifiers
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      • Reports (optimiser)
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      • Optimum feeds
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