The reasons are as follows:

(1) Some cabbages have a bitter taste and poor texture, which is related to fertilization. Applying nitrogen fertilizer will increase the yield of Chinese cabbage, but such cabbage will increase the yield due to fertilizer acceleration. Long, the taste is slightly worse, and if there is too much nitrogen fertilizer, the taste will be a little bitter.

(2) It may be related to the season. For example, Chinese cabbage in winter will be more bitter if it has not been "frosted". During the frost season, cabbage and other vegetables, in order to prevent their own cells from being damaged by freezing, will adjust the components in the plant and activate their own defense functions to "protect themselves."