Jonny B88
Member
- Location
- ballykelly. NI
So so so important!!!!!View attachment 1169750Photos: Courtesy of Gerardo Diaz.
Comment: Johann Zietsman
The above photos clearly illustrate the difference in grass conversion efficiency between two cows. The difference in efficiency is determined by Relative Intake as reflected in Inherent Body Condition.
The large frame, thin cow represents a "lean and 'efficient' " genotype resulting from selection for absolute growth and so-called feed efficiency as done in FCE feedlot feed tests (kg feed: kg gain) and NFE and RFI predictions.
The small frame cow (probably heavier) represents true efficiency - large intake above maintenance requirement.
It should be clear to any cattleman with his feet on the ground that efficiency of grass conversion is positively related to inherent body condition as determined by relative intake. Select for grass conversion efficiency via:
* 2 + 3 calving
* Yearling bull maturity
Animal "scientists" need to leave their offices and do some serious observations out in the veld.
@unlacedgecko