UPDATE 1-Bunge reports quarterly loss on tax charges, lower grains margins

(Adds fourth-quarter details, background, earnings details)

Feb 14 (Reuters) - Bunge Ltd reported a loss for the fourth quarter compared with a year-ago profit, hurt by tax law changes and lower margins in its grains business.

Bunge and other agricultural traders including Archer Daniels Midland Co and Cargill have been trying to diversify into higher-margin sectors such as food ingredients and aquaculture in the face of falling prices for grains.

Bunge said sales in its agribusiness segment, the company's largest revenue generator, fell 3.5 percent to $7.90 billion even as volumes rose.

Bunge, the subject of a takeover offer from larger rival ADM, said net loss available to shareholders was $69 million, or 48 cents per share, in the quarter ended Dec. 31, compared with a profit of $262 million, or $1.82 per share, a year earlier.

The White Plains, New York-based company took a $66 million charge due to tax law changes in the United States and Argentina.

Net sales fell 1.6 percent to $11.61 billion.

Separately, Dutch food ingredients company Corbion said on Wednesday it is in talks to buy Bunge's 49.9 percent stake in their oil joint venture in Brazil. (Reporting by Anirban Paul in Bengaluru; Editing by Maju Samuel)