Funding for this research was provided by:
Science and Technology Planning Project of Guangdong Province (2016B020203002)
Special Funds for Basic Research and Operating Expenses of Central Level Public Welfare Scientific Research Institutes (CAFYBB2017QA015)
Forestry Science and Technology Innovation Project of Guangdong Province (2015KJCX031)
Received: 12 January 2019
Accepted: 14 June 2019
First Online: 21 June 2019
Ethics approval and consent to participate
: Not applicable.
: The authors declare that they have no competing interests.