Funding for this research was provided by:
National Key Research and Development Program of China (2017YFD0501000)
13th Five-Year Science and Technology Research and Planning Project of the Education Department of Jili Province (JJKL20190910KJ)
Received: 27 December 2019
Accepted: 4 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: The study protocol was in accordance with the ethics guidelines of Jilin Agricultural University (JLAU) and the study was approved by the review board at JLAU, Changchun, China.
: Not applicable.
: The authors declare that they have no competing interests.