Accumulation rate of digestible materials and formation rate of indigestible materials in the description of relative growth rate of forages

This study was conducted to clarify the interrelationships between some ana lytic equations for the accumulation rate of digestible materials [ARD] and the interrelationships between those for the formation rate of indigestibl e materials [FRI], followed by the description of forage relative growth ra te [RGR] using ARD and FRI. The following results were obtained: There were two equations to analyze ARD and one equation was a modified ts-pr of the other equation. Four equations were set up to analyze FRI and the prototype one mas modified to change into the fourth equation which might describe t he target materials of lignification more clearly than the other three equa tions. Forage RGR was described using ARD and FRI and this might give anoth er interpretation of RGR based on the utilization characteristics of forage s. It was suggested that there were some equations to analyze ARD and FRI d escribing RGR of forages.