The quality identification of Auricularia auricula is a very complicated problem. Strains can be roughly divided into multi-gluten, semi-gluten and few-gluten. According to different growth bases, it can be roughly divided into mushroom bag cultivation, basswood cultivation and wild, and it can be divided into spring ear, summer ear and autumn ear according to different picking seasons. Auricularia auricula is generally the best fungus bag, and autumn ear is the best basswood. There are wild ones, but not in batches, and the quantity is not much more than that of wild Ganoderma lucidum. Therefore, the quality of black fungus is a very complicated standard, but one thing, in addition to the classification stipulated by the national standard, the simplest way is to look at the foaming amount. The high foaming rate of auricularia auricula is basically good, and the personal foaming rate is not lower than 13.

Basswood auricularia auricula refers to auricularia auricula cultivated in wood segments, which can plant a variety of tree species. It tastes different. As long as it is on wood, auricularia auricula has the following characteristics:

1. Dried basswood fungus has obvious wood smell.

2. Because it grows on wood, the roots of auricularia auricula occasionally have sawdust or bark. If the root is cut off, there should be obvious shear marks.

3, basswood fungus has a strong taste when it is soaked, and there is no sour or greasy taste.

4. After soaking, the ear of basswood will have obvious lateral roots or protrusions.

5. Whether it is crisp autumn ear or soft glutinous spring and summer ear, its taste is more delicate than that of fungus bag.