Cookie Policy 31 Days of Tips and Tricks—Day 18: What Analyses are most critical to the Model? - Agricultural Modeling and Training Systems, LLC

silage-sampling

So, in hand with discussion of importing feed analyses, analyses performed and frequency should be addressed. What analysis should we be taking on our feeds? Well, that depends on what the feed is.

Forages

For all Forages the following analysis should be performed:

  • DM
  • NDF
  • Lignin
  • dNDF (preferably 24hr)
  • Ash
  • CP

Silages

  • Ammonia
  • Soluble Protein
  • Fermentation Acids

High Starch Forages

  • Starch
  • 7 hr digestibility

Hays

  • Sugar

Protein fractions are good to have but do not have a very high sensitivity in the Model

  • ADIP
  • NDIP

 

Non-Forages

Fibrous Products

  • DM
  • NDF
  • Lignin?
  • dNDF?
  • Ash
  • Fat
  • CP
  • Sugar

Feeds >20%Protein

  • DM
  • CP
  • NDIP
  • ADIP
  • Soluble Protein

Starch>15%

  • Starch
  • 7 hr starch digestibility

Frequency of analysis and number of samples is another issue. Work by Weiss and St-Pierre form The Ohio State has devoted considerable attention to sample frequency, number, and variability dependent on feed, heard size, and storage method. We will look at some of that information tomorrow.

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