Received: 30 April 2021
Accepted: 29 August 2021
First Online: 20 September 2021
: The plant materials (barley and Qingke) used in this article were obtained from the Academy of Agriculture and Forestry of Qinghai University. All plant materials were provided free of charge and maintained in accordance with international guidelines. This article did not contain any studies with human participants or animals and did not involve any endangered or protected species.
: Not applicable.
: The authors declare that they have no competing interests.