Answer: Well, plants can be amazing in their survival techniques, but there are two main factors to consider: 1. With the loss of so many limbs, it has lost much of its ability to photosynthesize and provide nutrients for growth. 2. The broken branches will have left open wounds which provide easy entry for pests and disease.
Make sure the tree has adequate water that reaches through its entire root system so that it is not stressed for water. I wouldn't recommend fertilizing at this point. Trim off any broken stubs, etc. Don't leave stubs and don't make flush cuts, both of which allow easy entry for pests and disease. Also, don't seal wounds with any paints or sealants. The tree's own healing tissue will do that. Leave the remaining branches. The fact that they are at the bottom of the tree is good. Lower branches help a trunk develop girth and stability. Leave them for several years, at least, until you determine if the tree is going to survive. Good luck!
Q&A Library Searching Tips