Cost/Unit of Nutrient

- Another method to evaluate a feedstuff

- Still need to consider specie limitations

- Basis for “Least-Cost” Nutrition

Cost per unit of nutrient = Cost of feed /unit of weight

Unit of wt x % nutr. conc.

Example #1: Cost / lb of Protein

SBM (44%) @ $240/ton

DDG @ $140/ton

SBM = $240/ton = $.272/lb of Protein

2000 x .44

DDG = $140/ton = $.259/lb of Protein

2000 x .27
Example #2: Cost / lb of Lysine

SBM (44%) @ $240/ton

DDG @ $140/ton

SBM = $240/ton = $4.137/lb of Lysine

2000 x .029

DDG = $140/ton = $7.777/lb of Protein

2000 x .009

Example #3: Cost / unit of TDN

Alfalfa Hay @ $110 /ton (51% TDN)

= $110 = $.107/lb of TDN

2000 x .51

Example #4: Cost / unit of Valine

Milo @ $4.20/cwt (.53% valine)

= = $7.924/lb valine
Example #5: Cost / lb of NE_L

Oats straw $50/ton (1.056 Mcal NE_L / kg)

= $50/ton = $.023 Mcal NE_L/lb

2000 x 1.056

1.056 Mcal NE_L x 1 kg = .48 Mcal NE_L/ lb

kg

= $50/ton = $.052 Mcal NE_L/lb

2000 x .48

Example #6: Cost / unit of TDN on Dry Matter Basis

Alfalfa Hay @ $110 /ton (51% TDN) 90% DM

= $110 = $.107/lb of TDN As-Fed

2000 x .51

= $.107/lb of TDN =$.118/lb of TDN DM

.90

Does it make sense???