Funding for this research was provided by:
Shandong Province Modern Agricultural Industry Technology System (SDAIT-07-07)
Natural Science Foundation of Shandong Province (ZR2018LC022)
National Natural Science Foundation of China (31301438, 31501331)
Article History
Received: 26 July 2018
Accepted: 4 January 2019
First Online: 12 January 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.