Hi Fede1952 - welcome to the forum.
Your question is VERY wide open (no pun intended) and could give you a whole host of different answers.
Landscapes & portraits alone could warrant two totally different lenses, and that will also depend on your budget too. Do you want to stay with Nikon/Nikkor lenses or are 3rd party open to suggestion too?
Without knowing anything else I would go with;
Landscape:
Fixed; AF 14mm f/2.8 (manual focus only)
Zoom; AF-S 14-24mm f/2.8G ED
Portrait:
Fixed; AF-S 85mm f/1.8G or AF-S 105mm f/2.8G ED-IF
Zoom; AF-S 70-200mm f/2.8G ED
The above are in no way absolute ideal lenses for what you want, for what might be appropriate or anything - merely lenses that fit into possible scenarios that you want to photograph.
Have a search or look around on the sub topics in the forum - there is a massive wealth of knowledge there if you're willing to take the time to have a look.
Fixed