Q.fruit tree girdling
Sometime within the past few days rodents have had a feast on 2 peach trees I planted 2 years ago. They totally girdled both trees at the base of the trunks at the soil level and approximately 4 to 6 inches above the soil level. Is there anything I can do to save these trees?
First aid is in order. Loose bark needs to removed from the girdled area - trim back to where the bark is still firmly attached to the trunk. You will then do a procedure known as "repair grafting" whereby you take healthy branches or twigs from the same tree and use them to repair the girdled trunk and restore the flow of nutrients. The repair grafting process is explained in detail here:
https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-fix-girdled-trees.htm