Answer: If the tree was not completely girdled--that is, the bark around the entire circumference of the tree damaged--then there's hope. The bark contains the cambium; this is the plant tissue that brings the sugars manufactured in the leaves down to the roots. As long as there is some connection between the crown of the tree and the roots, some nutrients can flow. The tree's growth may be stunted for a while, however. It used to be recommended to paint a wound dressing on any tree wounds--pruning cuts, etc. This has fallen out of favor; rather, it is usually recommended to let the tree do the healing on its own. Keep an eye on the tree, baby it a little with some compost mulch and plenty of water, and hope for the best.
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