More than 10,000 farmers have taken part in a protest march in Dublin City against current European proposals in negotiations on world trade.

The farmers gathered at Leinster House this afternoon and marched to Dublin Castle where European Commission President Jose Manuel Barosso was addressing the forum on Europe.

Farmers from all parts of the country took part in the march and original turnout expectations were well exceeded.

Those involved are unhappy about the stance EU Trade Commission Peter Mandleson is taking in the current negotiations on world trade.

They say the beef and dairy sector could be virtually wiped out.

This evening the President of the Irish Farmers Association said the current proposals to cut import tariffs will have an impact on how farmers vote in the Lisbon Treaty Referendum.

Padraig Walshe warned farmers would not support a European Commission that sells out their industry.

Agri-businesses around the country are also closing this afternoon over their concerns about the trade talks.

European Commission Director General for Trade David O'Sullivan has defended the proposals, saying that if implemented, the deal would take effect over a number of years.

Mr Barroso said a deal at the Word Trade Organisation talks is in Ireland's interest.

Noting that Ireland has 4% of the global market in traded services, Mr Barroso said a deal that opened more markets to Irish exporters was a good thing.

He said getting a deal sooner rather than later would guarantee the reform of the Common Agriculture Policy agreed four years ago.

But he warned that delaying the deal could mean that a review of the CAP starting in the autumn could result in a less favourable outcome for farmers.

Farmers are angry over the stance being taken by EU Trade Commissioner Peter Mandleson in the current round of negotiations to liberalise the rules on world trade.

They say Ireland's livestock industry would be decimated, and there would be cuts the dairy, grain and other sectors.

This could result in 50,000 rural jobs being lost and 100,000 cattle farmers being made redundant.