The tree as it is can't be saved. It is fully girdled and it with die as is.
You can either purchase a new tree or have a little fun over the next few years.
The top of the tree is likely still alive at this point. So you can take cuttings from the top an with some rooting hormone start new trees from it. You can plant these directly into the ground once established.
The root is a different species and is also alive. If you cut off all of the grafted section the rootstock will send up new growth. Then next year you can take cuttings and grow the rootstock for a year.
In 2 years you can graft new trees like what you have. In another 3-4 years you'll have a tree the size of the original.
The tree as it is can't be saved. It is fully girdled and it with die as is.
You can either purchase a new tree or have a little fun over the next few years.
The top of the tree is likely still alive at this point. So you can take cuttings from the top an with some rooting hormone start new trees from it. You can plant these directly into the ground once established.
The root is a different species and is also alive. If you cut off all of the grafted section the rootstock will send up new growth. Then next year you can take cuttings and grow the rootstock for a year.
In 2 years you can graft new trees like what you have. In another 3-4 years you'll have a tree the size of the original.