Nurturing a nascent recovery, Federal Reserve policymakers are sure to leave a key interest rate at a record low and probably will keep other economic supports in place.

Fed Chairman Ben Bernanke and his colleagues are slated to wrap up a two-day meeting Wednesday afternoon, when they are expected to announce that the recession is likely over and that the nation’s economic and financial climate is improving. But they’ll also warn that rising unemployment, and still hard-to-get-credit for many people and companies, will make for a plodding rebound.