Gono said Zimbabwe needed to raise foreign currency for imports to avert further drought-induced food shortages.

"The drought situation in the economy impels that appropriate measures be put in place...the Reserve Bank has, with immediate effect, opened up a foreign currency drought stabilisation bond," Gono said.

He said the country's exporters, local individuals with foreign currency, Zimbabweans living abroad and foreign investors could take up the two-year bonds.

Money raised through the bond would go towards a drought mitigation and economic stabilisation fund, which would finance food imports, Gono said.

But analysts said the new measures would not be enough to help President Robert Mugabe's government ride out a severe economic crisis that many blame on mismanagement, controversial policies and confrontation with Western powers and donors.

The World Bank says the southern African country has the fastest shrinking economy outside a war zone, while the IMF says Zimbabwe's inflation -- already the world's highest -- might accelerate to 3,000 percent by the end of this year.

On Thursday, Gono said annual inflation jumped to a record 2,200 percent last month from 1,729.9 percent in February, and he raised lending rates by 100 percentage points to 600 percent in a bid to tame the rising prices.

Gono, appointed by Mugabe over three years ago to turn around the economy, said there would be no merit in accepting clamours by commerce and industry to devalue the Zimbabwe dollar, pegged at 250 to the US dollar but selling at 100 times that rate on a thriving black market.

But he indirectly devalued the Zimbabwe dollar to an effective rate of Z$15,000 to the US dollar by offering a new rate for foreign currency the central bank will be buying for the new drought stabilisation fund that he said would be set up.

The country's exporters, mainly miners and tobacco farmers, have protested that the skewed exchange rate has devastated their businesses.

MAIZE DEFICIT

Zimbabwe is facing an estimated 1.5 million tonnes deficit of the staple maize as a result of low production on commercial farms seized from whites for black resettlement, but Gono said the shortage was mainly due to drought.

"Thorough crop assessments undertaken over the last two months have confirmed the devastating effects of the drought this current season, which drought has not only hit Zimbabwe alone but the sub region as a whole," he said.

Zimbabwe, once the breadbasket of southern Africa, is crippled by foreign currency and fuel shortages, unemployment of over 80 percent and the highest rate of inflation in the world.

Mugabe's government has responded to a series of strikes and political protests since the beginning of the year with a violent crackdown on political opponents.

The central bank governor said the overnight secured interest rate would rise to 600 percent from 500 percent previously. The unsecured rate would rise to 700 percent from 600 percent.

In a bid to improve the viability of exporters, Gono raised the central bank's gold support price to Z$350,000 per gram from Z$16,000 and introduced a new support for tobacco of Z$40,000 a kg.

Leading private Zimbabwean economic consultant and commentator John Robertson said Gono had skirted the main issues, and his measures were inadequate.