Beleaguered Sudanese President Jaafar Nimeri is conducting secret, high-level talks here through emissaries aimed at ending his decade-long feud with Col. Muammar Qaddafi of Libya, Sudanese opposition sources said today.

The sources, who requested anonymity, said the latest talks took place here three days ago between Baha Idriss, Nimeri's presidential adviser, and Ahmad Qaddafi, a cousin of the Libyan ruler.

The outcome of the talks was apparently inconclusive, but their existence underlined Nimeri's efforts to save his 16-year-old government even at the cost of burying the hatchet with his Libyan enemy.

This week's meeting -- and an earlier round in January, also held in Paris -- were arranged by Adnan Khashoggi, a multimillionaire Saudi businessman. In recent months Khashoggi has become a key adviser to Sudan's government, which is plagued by armed rebellion, drought and a severe financial and economic crisis worsened by a suspension of major aid from the United States and the International Monetary Fund.

The sources said Nimeri offered to silence an anti-Qaddafi radio station just south of his capital of Khartoum and to hand over exiled Libyan dissidents if Libya stops its financial and military aid to John Garang, leader of the southern Sudanese rebel group called the Sudanese People's Liberation Movement.

Khashoggi also was dispatched within the last 10 days to Washington with a message for President Reagan, the sources said.

In the message, Nimeri was said to have boasted of solid Army support and of his anticommunist and anti-Qaddafi credentials.

The sources cited the apparently contradictory Nimeri initiative as "yet another example of the Sudanese leader's apparent failure to understand the implication of his acts." The sources said high-ranking U.S. officials, who briefed Vice President Bush, scheduled to leave Washington this weekend for a four-day visit to Sudan, had told them that "we are aware" of Nimeri's twin initiatives.

Sudanese contacts with Qaddafi would be embarrassing for Egypt, whose president, Hosni Mubarak, considers Qaddafi his major adversary and is wary of his influence in the Sudan.