Funding for this research was provided by:
Chinese Academy of Forestry (project CAFYBB2017ZC006 and 2project CAFYBB2017MA019)
Chinese Academy of Forestry (project CAFYBB2017ZC006 and 2project CAFYBB2017MA019)
Chinese Academy of Forestry (project CAFYBB2017ZC006 and 2project CAFYBB2017MA019)
Chinese Academy of Forestry (project CAFYBB2017ZC006 and 2project CAFYBB2017MA019)
Article History
Received: 23 September 2019
Accepted: 7 February 2020
First Online: 26 February 2020
Competing interests
: The authors declare no competing interests.