DETERMINING THE OPTIMAL HEIGHT OF THE TREE TRUNK FOR EXTRACTING BIRCH SAP

Abstract

The study on birch sap amount was carried out in 2023. In the forests of Radviliškis, the optimal amount of sap extraction in the trunk was evaluated according to the height of the extraction location. According to the directions of the world, the extractable amount of sap was measured every 0.5 m up to 2 m height. As a result of the research, a consistent decrease in the amount of extracted sap was determined with the increase in the height of the extraction location. When determining the optimal location for the sap extraction in the birch trunk, causing as little damage as possible to the tree, it is necessary to extract the sap from a height no higher than 0.5 m. The orientation of the extraction location according to orientation of the world direction did not affect the amount of birch sap.