Abstract: The fatty acid change in northeast corn is divided into four stages. The first stage is in the harvest period, the second stage is the corn cob storage in the yard, the third stage is the large pile of storage before drying after threshing, and the fourth stage is the storage after drying. The first three stages were studied. The results showed that the fatty acid values of different maize varieties from the same producing area were different during harvest, and the maximum difference was 19.6 mg/100 g. The fatty acid value of the same variety of corn from different producing areas was different, and the maximum difference was 10.9 mg/100 g. During the storage of corn cob in the courtyard, the follow-up test lasted for 6 months, rack stacking and roof stacking were better than brick stacking, and the effect of land stacking was the worst. During the storage of high-moisture corn cob, the fatty acid value of non-hot corn heap increased by 0.6~1.9 mg/100 g, and the fatty acid value of hot corn increased by 6.0~14.7 mg/100 g, and the fatty acid value of hot corn increased rapidly.

Key words: corn, fatty acids value, change