Do you want to make a Recycle Bin | Trash Can shortcut in your Ubuntu desktop? I know there's a shortcut in panel, but what if I want it in my desktop?
This is how :

• on the desktop, right click and choose Create Launcher
• fill the blank :
  Name        : name it as you wish : Trash Can, Recycle Bin
  Command : nautilus trash:///
  Comment  : your choice
• you can click the icon on the left to change it,
• click close

Update :
There's an alternative way :

Use gconf-editor then go to /apps/nautilus/desktop and checkmark trash_icon_visible.

While you're there you can rename by open the trash_icon_name, change value type to string then type its name.

keyword : trash, recycle bin, shortcut, on desktop, command line