Divisions within the Baird government over its controversial native vegetation reforms are emerging, as Liberal MP Bruce Notley-Smith warned they could trigger "further irreversible land degradation".

In a letter to a constituent, Mr Notley-Smith, the member for Coogee, said he had told Premier Mike Baird and Primary Industries Minister Niall Blair of his "strong concerns".

"I am very concerned that these reforms could lead to further irreversible land degradation and endangerment of native wildlife habitat," the MP said in his letter.

The government is planning to repeal existing native vegetation and threatened species acts, replacing them with biodiversity conservation bills originally aimed at providing better environmental outcomes while giving farmers more freedom to clear land.