Autumn fungus because of the low temperature. The growing period is longer, so the ear pieces are thicker and darker. Nutrient accumulation is relatively sufficient. In winter, the temperature of the ear is high. The lugs are thinner and lighter in color, which is the basic difference.

Identification of Auricularia auricula Due to different growth environments, different harvest seasons and different drying degrees, five kinds of defective ears will be formed. Its variety characteristics are as follows:

Fist ear-fist-shaped auricularia auricula, which is formed by not drying in time in rainy and humid seasons and sticking to each other when turning over.

Flowing ear-under the condition of high temperature and high humidity, light-colored flaky auricularia auricula can be harvested in time.

Ear loss-Auricularia auricula loses its commercial value due to high temperature and high humidity, which leads to colloid overflow of Auricularia auricula and damages the meat quality.

Worm-eaten ears-incomplete fungi formed by insects.

Moldy fungus will be corroded by moisture if it is not well preserved, forming caked moldy and deteriorated fungus.

Sensory identification requirements for the quality of Auricularia auricula are as follows:

Good quality-the ear surface is dark brown and shiny, the back of the ear is dark gray, and there is no punching ear, flowing ear, falling ear, insect-eaten ear or moldy ear; The petals are intact and cannot pass through a sieve with a diameter of 2 cm; The thickness of the lug is greater than 65438 0 mm; Impurity content shall not exceed 0.3%.

Second-class quality-the ear surface is dark brown and shiny, the back of the ear is dark gray, and there is no miscellaneous ear, flowing ear, falling ear, insect-eaten ear and moldy ear; Petals are basically intact and cannot pass through a sieve with a diameter of 1 cm; The thickness of the lug is above 0.7 mm; Impurity content does not exceed 0.5%.

Inferior-the color of ear parts is mostly dark brown to light brown; Boxing ear shall not exceed 1%, flowing ear shall not exceed 0.5%, and it shall not be mixed with lost ear, insect-eaten ear and moldy ear; Petals are small and broken, and cannot pass through a sieve with a diameter of 0.4cm; The thickness of the tab is below 0.7mm, and the impurity content shall not exceed 65438 0%.