The BBC should invest in "unique, high quality radio, not supporting a large number of services," Davie told the Guardian.
"I do not believe that offering the current range of nine standalone digital networks is the right way to serve audiences and ensure radio remains strong in a digital world," he said.
"Clearly we didn't arrive lightly at the decision to recommend the closure of 6 Music: it is distinctive, much-loved and I too am passionate about its output. But I believe the best way for us to provide that kind of programming is by looking at other ways to find it a bigger audience."
Davie said while digital radio has been growing, he is concerned about its slow development.
"I also believe it is essential that, as we re-invest the money currently spent on 6 Music, we protect some of its precious programming by redeploying it elsewhere in BBC radio and consider how we can also do justice to its legacy in areas like new music development."
Davie acknowledged the "real sadness" with closing 6 Music, but said it was part of a large strategy to keep BBC radio relevant and popular in a changing digital era.