Zimbabwe's new President Emmerson Mnangagwa said on Wednesday the country will hold transparent elections by July and he would respect the result if the opposition wins.

The election will be the first big test of his legitimacy since he took power in November when the military ousted Robert Mugabe who ruled for 37 years. It will also test the country's electoral system after complaints of rigging at previous votes.

Mnangagwa, 75, told the World Economic Forum in Davos the nation was "open for business".

Government spending ballooned under Mugabe and was in part used as patronage. More than 90 percent of the budget went on civil servant salaries, leaving little extra for investment needed to boost growth.

In the latter half of Mugabe's rule, Zimbabwe's economy collapsed, particularly after violent and chaotic seizures of thousands of white-owned commercial farms.

Mugabe had been given a "very lucrative package" that included a salary, allowances and first-class travel

The issuance of billions of dollars of domestic debt to pay for a bloated civil service also triggered a collapse in the value of the currency and fuelled galloping inflation.

Mnangagwa said he would welcome former commercial farmers to return. "We don't want to think along racial lines, that is the philosophy of the past. Farmers are farmers," he said.

Some former cabinet ministers who served under Mugabe have been charged with corruption and Mnangagwa said Mugabe would not be immune from prosecution.

"We have not given anyone any immunity," he said, but added that Mugabe had been given a "very lucrative package" that included a salary, allowances and first-class travel.

"We will do everything to allow the family to live in peace and undisturbed," he said.