I did not test barges but I would be suprised if it worked (at least not a well as trains). The discharge nodes should be able to fill anything but I dont think a barge would be able to empty into the silo. I also do not know if barges would be able to hold the additional multifruit goods I added. Lastly, the pipe doesnt stick out super far (it is about 3m from the building) so that probably isn't far enough without some type of dock or something which idk if this would sit on properly.
Either way, I had though about looking into in for an update, either barges or potentially whatever new boats are included in the Highland expansion (if we get a boat that can hold bulk goods).