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Long-term calcium addition increases growth release, wound closure, and health of sugar maple (Acer saccharum) trees at the Hubbard Brook Experimental Forest

We surveyed and wounded forest-grown sugar maple (Acer sacchamm Marsh.) trees in a long-term, replicated Ca manipulation study at the Hubbard Brook Experimental Forest in New Hampshire, USA. Plots received applications of Ca (to boost Ca availability above depleted ambient levels) or A1 (to compete with Ca uptake and further reduce Ca availability). We found significantly greater total foliar and membrane-associated Ca in foliage of trees in plots fertilized with Ca when compared with trees from Al-addition and control plots (P = 0.005).

Equating Syrup Price to Sap Price

In fairness to both sap producers and sap purchasers, the price of maple sap should be directly related to the price of maple syrup. This chart helps calcuate that value.

Sugar Maple Tree Improvement Program

Maple producers and rural landowners throughout the maple syrup producing regions of the Northeast have expressed interest in acquiring improved sugar maple seedings for future sap production. A sugar maple tree improvement program for high sap concentration began in the 1960s under the direction of the USDA Forest Service.

Update on the Maple Tubing Sanitation Research in Ontario

In the spring of 1998, a research project was initiated to develop alternative methods for maple produces using plastic tubing systems. Although the results are only preliminary, the development of alternative sanitation methods that may reduce reliance on chlorine is looking very promising.