Well, the tree was my intended backstop, but I didn't know about the fragileness of the arrows and that they would break,
trees are lousy backstops, unless breaking arrows is your objective. besides broken arrows, you will have alot of deflected arrows; and someone will get hurt.
you need a better backstop. broken arrows will be the least of your worries then. none of us want that. work on getting a backstop.
when i was younger, i would use a couple of hay bales. or when in an area that is safe to do so, dont use a backstop. that way when you miss, you get to look for your arrows. this gives you motivation to hit your target.
another option is to get some judo points. these will snag grass and keep you from loosing arrows. two things here- 1. judos will still kill and are still dangerous. 2. bouncing judos off a tree will break your arrows just as fast.
the main thing here is that you be very safe. if in doubt, dont. good luck with your shooting, stay safe and shoot straight!