CHICAGO, April 9 (Reuters) - U.S. corn supplies will shrink by more than previously forecast due to rising demand from the ethanol, livestock feed and export sectors, the U.S. Agriculture Department said on Friday.

In its monthly World Agricultural Supply and Demand Estimates report, USDA forecast that the domestic corn stockpile will fall to 1.352 billion bushels by Sept. 1, down from 1.919 billion bushels in September 2020. That compares to the government's March outlook for corn ending stocks of 1.502 billion bushel.

Analysts had been expecting the report to show corn stocks of 1.396 billion bushels, according to the average of estimates in a Reuters poll. (Reporting by Mark Weinraub; Editing by Caroline Stauffer)