Pecans can keep in freezers for two to three years; they are 80 percent oil, which remains very stable when frozen, says Brenda Lara, plant manager at Green Valley Pecan Company in Sahuarita, Ariz.

• 根据亚利桑纳州绿河谷核桃公司工厂的经理拉纳所表示，薄壳核桃可以在冷冻库中保存2~3年，因为它的成份有80%25是油，冷冻后非常稳定。