Funding for this research was provided by:
Chongqing Municipality Key Forestry Research Project (No. Yulinkeyan 2016-8)
International Sci-Tech Cooperation Project of Ministry of Science and Technology (No. 2015DFA90900)
Forestry Extension Project of China Central Finance (No. Yulinketui 2017-12)
Article History
Received: 27 April 2019
Revised: 27 January 2020
Accepted: 4 February 2020
First Online: 10 February 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest.