Help - transplanted salix tree

[gobbleguts]

I hope someone can help me. I know nothing about gardening but I am trying my best. I planted a salix tree in a border 2 years ago, it's done really well and grown to 5ft! It was however getting the branches squashed against a nearby fence so I decided to dig it up and transplant it where it will have more room.

I dug it up but there were long thick roots spread under the ground which travelled quite far. How much of those long thick roots should I have trimmed?

I tried to retain them as much as possible but ended up having to squash them in next to the tree when I planted it and then compost/soil on top.

The leaves have now starts to go crispy and I'm watering as much as I can to keep the soil moist but I'm worried I have killed it!

The root ball directly under the base of the tree was still intact with lots of soil attached but the long winding roots I've had to squash next to the root ball - clearly I have no idea what I'm doing! should I have trimmed those completely back?

You should probably have cut back the tree a fair bit, so that the roots you managed to transplant didn't have to support so many leaves. But it will probably be OK. Willows can grow from cuttings without any root at all, so with a decent root mass it will probably recover, even if it loses many of its leaves from the initial shock.