Compared to other dog breeds, dachshunds are moderate to light shredders.
All dogs shed fur as new fur grows, and dachshunds are no different.
Wire dachshunds do not shed and require plucking (it painless) of loose hairs.
Smooth dachshunds do not grow a seasonal coat so tend to shed less than longhairs.
There are two varieties of long hair dachshunds the true english creams with lucious full coats like a golden retreiver because they are bred exclusivley long coat to long coat.
The more typical version of a long coat you will see has a shorter body coat with long primarily on the tail and ears. This is the result of breeding a long to a smooth.
While I have never owned a silky/soft wire I can only imagine that they would tend to shed the most with their thick unruly coats.