**3. Results and Analysis**

*3.1. CAT Activity Analysis of Maize with Different Moldy Levels*

Table 1 shows the range, mean, and standard deviation of CAT activity values under different moldy levels. The maize kernels used in this experiment were sterilized, and the CAT activity value of the sample was 0 under the healthy level. The results showed that CAT activity values increased with the aggravation of maize moldy levels, and CAT activity values increased rapidly in the early stages of mold and slowly in the late stages, which was related to the growth pattern of the mold. The CAT activity values of different moldy levels had obvious gradient differences, indicating that CAT activity values could be used to determine the level of moldy maize.

**Table 1.** Catalase (CAT) activity value of maize with different moldy levels.

