TORONTO (Bloomberg) - Canadian stocks rose a second day as Potash Corp. of Saskatchewan Inc. and other raw-materials and energy producers advanced on record prices for commodities.

The Standard & Poor's/TSX Composite Index rose 220.98, or 1.7 percent, to 13,447.74 in Toronto, the most since January 24. The benchmark has fallen eight percent since touching a record on October 31, on concern that slower US growth may curb Canadian resource exports and that banks' credit market losses may mount.

"Commodities have a long way to run," said Gerry Brockelsby, who manages about $296 million at Marquest Investment Counsel in Toronto. "Growth in emerging economies is still strong. The market's looking ahead. This activity in commodities will continue once we get past the weak patch in the US economy."

Potash Corp. rose C$7.90 to a record C$157.25. The largest producer of crop nutrients in the world expects food demand from China and India to buoy grain prices for years. Smaller rival Agrium Inc. gained C$3.22 to C$69.

"When you see India tripling their middle class, China going from 200 million people in the middle class to 600 million people in the middle class, there is a tremendous competition for food," Potash CEO William Doyle said in a Bloomberg Television interview.

Barrick Gold Corp., the world's largest bullion miner, gained C$2.97, or 6.2 percent, at C$50.98, the most in Toronto Stock Exchange trading since January 22. Goldcorp Inc., the second-biggest producer of the metal by value, rose C$2.31 to C$39.50.

Canadian Natural Resources Ltd., the country's second-largest natural-gas producer, jumped C$2.95 at C$68.05. Suncor Energy Inc., the second-largest oil-sands miner, added C$2.73 to C$99.59. Talisman Energy Inc. rose 57 cents to C$16.36.

The UBS Bloomberg Constant Maturity Commodity Index rose as much as 3.1 percent to a record 1,447.015, on signs of increased global demand for raw materials and a weakening US dollar.

Soybeans rose to a record in Chicago and corn gained on speculation China will boost imports to rebuild grain reserves after food inflation quickened.

Crude oil advanced to a record $100.10 a barrel on speculation the Organisation of Oil Exporting Countries will curb production.

Natural gas gained. Gold futures in New York added 2.6 percent to $929.80 an ounce. Copper climbed to a four-month high on signs of rising demand from China, the top metals buyer.

Gauges of raw-materials and energy stocks, which account for more than two-fifths of the S&P/TSX's value, added 4.2 percent and 1.8 percent, respectively.