Watch this time lapse video of maple research taking place at the Ohio State Sugarbush located on the OSU Mansfield Campus.
Across 13 racks with 5, 6, or 7 canisters each, the OSU maple team emptied sap to monitor individual tree yield and sap sugar content…daily! The 75 research canisters will help us answer questions about how red x silver hybrid trees (Acer freemanii or “rilver” for short) compare to sugar maple production standards. The PVC canisters are a new design engineered by the team, and vacuum consistently achieved levels in the 22-25 pounds range. A drill pump mounted on a standard cordless drill boosted our sampling efficiency, and a digital Misco refractometer handled sugar readings.
While the data won’t be formally analyzed for a bit, we were surprised just how variable individual trees performed based on sap volume as well as sap sweetness. A couple trees achieved sugar content readings over 3 even at the end of the season. While other trees struggled to break 1.2 or 1.3% all season. For yield, 2-3 gallons a day was average for some trees. Normal for others amounted to just 1 or 2 quarts. The team is pulling down the research equipment now for off-season storage.
Stay tuned for updates.
Author: Gabe Karns, OSU Mansfield & SENR 