Funding for this research was provided by:
Nature Science Foundation from Science and Technology Department of Fujian Province (2018J05013)
Education Research Project for Young and Middle-aged Teachers of Fujian Province (JT180136)
Outstanding Youth Research Training Program of Fujian Agriculture and Forestry University (XJQ201818)
Article History
Received: 11 January 2019
Accepted: 16 January 2019
First Online: 2 February 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.