DETERMINATION OF FIRST LIMITING PHYSICAL FACTORS IN CORN SILAGE HYBRIDS: MODELING MULTIPLE POOLS OF RUMINAL aNDFom DIGESTION

摘要

The objective of this work was to develop an approach to rank the corn forage hybrids based on what we understand about rumen fill that integrated all of our current understanding of the behavior of aNDFom digestion in the rumen. The approach taken inthis paper demonstrates the potential utility of having information and a procedure to evaluate the concepts of physical fill and DMI in conjunction with other components of the diet. This approach requires refinement to better describe intake limits due to chemical characteristics and rumen fill effects. However, through utilization of the dynamic mechanistic structure of CNCPSv7 and basing our assumptions on rumen evacuation data, a more robust prediction of the potential impact of each hybrid on DMI and milk production can be achieved. Ultimately the goal is to help forward predict the productive capability of the corn silage hybrid or any forage and gain a greater understanding of how to proactively formulate/complement these forages.