The source of lard is abundant in our country,but crude lard is very apt to be oxidized under normal atmospheric temperature because of many drawbacks on preparing lard method and the characteristic of lard.

• 我国猪油来源丰富,但因制油方法上存在很多弊端及猪油的特性,使毛猪油在常温下非常容易氧化酸败。