The main differences between alfalfa drying and sun drying are drying time, nutrient loss and color change. Generally speaking, the drying process has little damage to alfalfa nutrients, and the color of alfalfa has little change after drying.

1. drying time: low-temperature hot air rapid drying process is adopted for drying, with short drying time and high evaporation intensity; It takes a whole day to dry.

2. Loss of nutrients: The drying process has little damage to alfalfa nutrients, while the drying process has great damage to alfalfa nutrients.

3. Color change: the color of dried alfalfa changes little, but the color of dried alfalfa changes greatly, and nutrition may be lost due to sun exposure, and the appearance is ugly.

4. Cleanliness: Dry alfalfa may have the problem of uncleanness, but dry alfalfa does not have this problem.

To sum up, compared with sun drying, alfalfa drying has higher nutrient retention rate and better color change control.