* U.S. criticised on trade protectionism, China on currencies
* Obama calls for new strategy to rebalance world economy
* Peru pulls out of APEC summit over spat with Chile
* Leaders back off on 2050 emissions cut target
(Adds Obama's arrival in Singapore; end of 1st day of summit)
By Bill Tarrant
SINGAPORE, Nov 14 (Reuters) - U.S. President Barack Obama called on Saturday for a new strategy to rebalance global growth, but leaders around the Pacific rim, gathering for a weekend summit, took aim at signs of U.S. trade protectionism.
Obama, who arrived in Singapore late on Saturday for the Asia Pacific Economic Cooperation (APEC) summit, reiterated his call to redress the economic imbalances blamed by many for the global financial crisis.
The strategy calls for America to save more, spend less, reform its financial system and cut its deficits and borrowing.
"It will also mean a greater emphasis on exports that we can build, produce, and sell all over the world," Obama said in a speech earlier in Tokyo, his first stop on a nine-day Asian tour.
"We simply cannot return to the same cycles of boom and bust that led us into a global recession."
Fresh government figures on the U.S. trade deficit, which ballooned by more than 18 percent to $36.5 billion in September, could add urgency to Obama's efforts to seek greater export opportunities in China and other Asian countries.
Leaders of APEC, a 21-member grouping accounting for more than half of all global output and 40 percent of world trade, began their two-day summit on Saturday before Obama arrived and resolved to exert more political will to jump-start the Doha round of global talks, a news release after the meeting said.
They also "reiterated their commitment to reject all forms of protectionism", the release said. The homilies on Doha and trade protectionism are the usual templates of the yearly APEC meeting.
A row between two APEC members, Peru and Chile, soured the mood just as the summit was getting under way on Saturday.
Peru said it would leave Singapore early after recalling its envoy from Chile over charges a Peruvian military officer had spied for the Chilean government. The spying charges emerged as tensions between the South American neighbours ran high over a maritime border dispute.
The APEC meeting is the last major gathering of global decision-makers before a U.N. climate summit in Copenhagen in three weeks meant to ramp up efforts to fight climate change.
However, the latest draft of the leaders' declaration shows they had watered down the text on emissions cuts, dropping a reference to reductions of 50 percent by 2050, and pledging instead to "substantially" cut carbon pollution by 2050.
SNIPING AT WASHINGTON
Calling himself "America's first Pacific President", the Hawaii-born Obama signalled in Tokyo a commitment to the region, but with no specifics on how to re-invigorate his trade agenda.
He in fact largely missed the APEC summit's first day of business, after delaying his departure for Asia to attend a memorial service for soldiers killed in a mass shooting at a U.S. military base.
Obama went straight to an APEC dinner after arriving around 1200 gmt in Singapore, where leaders wore long-sleeved linen shirts reflecting the local Malay-Chinese culture, underscoring a tradition to don shirts from the host country at the summit's main dinner party.
Although Obama proclaimed his faith in open markets, the sniping of regional leaders ahead of his arrival underlined the challenge he faces to convince them it's more than lip service.
After taking office in January, the U.S. president focused first on a huge stimulus to the economy and then on a domestic agenda that so far has included little attention to trade.
No end is in sight for the Doha trade round, now eight years old, despite pledges by Obama and others to get a deal by 2010.
Mexican President Felipe Calderon, singling out Washington for trends "going in the opposite sense of free trade", said protectionism was a major threat to the global economy, citing as an example increasing "buy American" clauses in U.S. legislation.
Chinese President Hu Jintao said Beijing had done its part to lead the world out of recession but had been hit by trade probes and protectionist barriers, while Russian President Dmitry Medvedev took aim at barriers to trade.
Economists said Washington was missing the trade boat.
"There is a lot of activity in the region and this is all in the absence of U.S. engagement," said C. Fred Bergsten, president of the Peterson Institute for International Economics, saying U.S. inaction on trade was giving China and Asia an opening to forge trade agreements amongst themselves.
"What the Asians are hoping is that with this trip, Obama will begin the process of re-engaging with Asian in economic terms."
China's policy of pegging the yuan currency to a weakening dollar -- which makes Chinese exports comparatively cheaper -- has also come under fire at the APEC meeting. Obama has said he will raise the issue on a visit next week to China.
Aside from endorsing further moves toward free trade, the 21 leaders of APEC will agree to stick with economic stimulus policies until "a durable economic recovery has clearly taken hold", according to the draft declaration.
Obama will undoubtedly be in the limelight on Sunday, the summit's final day, and when the leaders pose for a traditional "family photo". Some participants feel the Bush administration gave insufficient attention to the region, a point Obama addressed in Japan without mentioning his predecessor.
"I know that the United States has been disengaged from these organisations in recent years. So let me be clear: those days have passed ... the United States expects to be involved in the discussions that shape the future of this region, and to participate fully in appropriate organisations." (Additional reporting by Neil Chatterjee, Patrick Markey, David Fogarty, Lucy Hornby; Writing by John Chalmers; Editing by Dean Yates)