Funding for this research was provided by:
National Natural Science Foundation of China (31771862)
International cooperation project of Fujian Agriculture and Forestry University (KXGH17002)
Text and Data Mining valid from 2019-12-17
Received: 13 August 2019
Revised: 29 November 2019
Accepted: 4 December 2019
First Online: 17 December 2019
Compliance with ethical standards
: The authors declare that this paper complies with all relevant ethical standards.
: The authors declare that they have no competing interests.