Funding for this research was provided by:
Natural Science Foundation of Shaanxi Province (2018JQ2022)
Shaanxi Province (2017BSHEDZZ100)
China Postdoctoral Science Foundation (2018T111102)
Postdoctoral Research Foundation of China (2016M600815)
Postdoctoral Research Foundation of China (2017M613213)
Northwest Agriculture and Forestry University (Z111021602)
Northwest A and F University (Z109021632)
Article History
Received: 4 November 2018
Accepted: 10 January 2019
First Online: 18 January 2019