Funding for this research was provided by:
the Natural Science Foundation Project Fund of Shandong Province (ZR2016BQ45)
Innovation Team Project for Modern Agricultural Industrial Technology Systems of Shandong Province (SDAIT-11-10)
Article History
Received: 20 June 2018
Accepted: 10 September 2018
First Online: 27 September 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflicts of interest.