Funding for this research was provided by:
the Long-Term Research Program for Young Teachers of Beijing Forestry University (2015ZCQ-SW-03)
the National Natural Science Foundation of China (31570677)
the National Key R&D Program of China (2017YFD0600503)
Article History
Received: 11 June 2020
Revised: 28 July 2020
Accepted: 1 August 2020
First Online: 11 August 2020
Compliance with ethical standards
:
: There is no conflict of interest regarding the publication of this article.