Nationals MP George Christensen has called for the end of the Coalition, after the scandal engulfing former deputy prime minister Barnaby Joyce threatened to tear the partnership apart.

The maverick MP, who has a habit of making provocative comments and threatening to leave the government, said he wanted to see a National Party in coalition with regional Australia "rather than wedded to a Liberal Party lurching further away from the values we still hold".

Putting an end to the Coalition would risk the collapse of the Turnbull government and the century-old agreement between the two parties, leaving the Liberal Party reliant on the Nationals to guarantee supply and confidence.

In December, Mr Christensen reneged on his threat to desert the Coalition if Prime Minister Malcolm Turnbull was still in power by Christmas, after repeatedly threatening to cross the floor over the banking royal commission.