Dry-matter drift changes the load

Rain, face location, crop variation, and storage can change silage dry matter faster than a full laboratory panel returns. If the as-fed load stays fixed, cows receive a different amount of forage dry matter and the rest of the TMR shifts around it. The ticket can look unchanged while the consumed diet has already moved.

Penn State’s TMR-management work treats moisture as a delivery variable, not a footnote. Whole-plant corn silage often leaves the field near 30–35% DM and later sits in a broader 30–40% fermented window; a few points of DM drift change how many kilograms of water you are loading as if they were forage. The useful habit is to monitor silage DM routinely, update as-fed loading, and keep the laboratory nutrient profile on a dry-matter basis.

Sister notes on this universe cover compare-dry-matter-not-water and the-lab-cannot-fix-the-sample. The physically-effective-fiber universe’s water-is-a-fiber-plasticizer and the-mixer-and-push-up-are-part-of-the-ration notes pick up how moisture also changes mixing damage and bunk delivery. Educational only — not a diagnosis, prescription, or ration formula.