UNITED NATIONS, October 26, 1995; (AP) - Six Tibetans rejected an appeal by U.N. Secretary-General Boutros Boutros-Ghali to end their hunger strike, demanding U.N. support in the Tibetan struggle for independence from China, the protesters said Thursday.

A statement by the National Democratic Party of Tibet said the request was conveyed Thursday by a U.N. medical officer who visited their camp across the street from the United Nations compound. Both Boutros-Ghali and his spokesman were in Washington and unavailable for comment. The statement said the six thanked Boutros-Ghali for showing concern for their health but insisted they would continue their hunger strike until the United Nations became involved in the Tibetan issue.

That appears unlikely. China claims Tibet is an integral part of its territory and as a permanent member of the Security Council, Beijing wields considerable influence in the world organization.

Seven Tibetans began the hunger strike Oct. 14 to draw attention to their cause during ceremonies marking the 50th anniversary of the United Nations. The ceremonies ended Tuesday. One of the hunger strikers, a woman, was taken to hospital this week after authorities ruled she was too weak to make a sound judgment on whether to continue refusing food.

In a related development, a ferry boat, emblazoned with an orange, blue and white banner proclaiming ''Welcome Taiwan to the United Nations,'' cruised Thursday along the East River near the U.N. headquarters. The boat was rented by 25 Taiwanese immigrant groups demanding that Taipei be admitted to the United Nations. Taiwan lost its seat in 1971 when the United Nations accepted the mainland Communists as the only legitimate government of all of China, including Taiwan.