Calculation of Starch Equivalent

CALCULATION OF STARCH EQUIVALENT

  • The percentages of the digestible nutrients are multiplied by the respective starch equivalent factors.
  • The arithmetic sum of these products is called as production value/starch value.
  • As the calculated production values differed with the actual values Kellner used a standard for concentrates called as golden number and correction factor for roughages.

Concentrate – Golden number (0.95):

  • For concentrates the actual starch value is obtained from the production value by multiplying with the ‘ golden number’ or ‘value number’.
  • The value number expresses the ratio between the starch value of a feedstuff and that of the pure nutrients contained in the feedstuff.

Actual SE of concentrates =

 Calculated production value x 0.95 Golden number

Roughages (Correction factor):

  • The production value of a roughage would be reduced by 0.58 units for every 1 per cent crude fibre present in the roughages.

Actual SE of roughages =

 Calculated production value x (CF% x 0.58 ) Correction factor

Last modified: Tuesday, 17 August 2010, 8:42 AM