The Kansas City Kings have applied to the National Basketball Association to relocate in Sacramento, Calif., for the 1985-86 season. The Kings' president and general manager, Joe Axelson, said yesterday the decision is irrevocable.

"We expect this application to be accepted," Axelson said. "This team is not for sale."

Of the disputed situation at Kemper Arena, Axelson said "income and attendance problems clearly override the new lease provision overtures" by Kansas City officials.

In Sacramento, team managing general partner Gregg Lukenbill expressed confidence that the Kings would turn a profit in his home city within two seasons. "Sacramento has become the 20th-largest television market in the nation," he said. " . . . by far the largest market in the United States without a major league team to call its own."

Axelson said the Kings, who have played 13 years in Kansas City since moving from Cincinnati, lost $1 million last year and expect to drop $1.8 million this year. He pointed particularly to "generally weak support over the years" from the business community in the Missouri metropolis.

"There are more than 350 companies in Kansas City with 100 or more employes who have no Kings season tickets," he said. Asked what reasons business leaders gave, Axelson said, "(prices) too high (although the NBA's lowest), no interest, my employes don't care. You know, the same things I'd say if somebody wanted me to buy tickets to the Philharmonic" . . .

A left knee injury requiring surgery will keep Detroit Pistons forward Dan Roundfield off the court for up to four weeks. The 6-foot-8 veteran, averaging 11.8 points and 8.5 rebounds this season, tore cartilage during Thursday's victory over New York -- yet played Saturday against New Jersey.