Funding for this research was provided by:
the National Key Research and Development Program of China (2016YFC0500602)
National Natural Science Foundation of China (31570470)
National Natural Science Foundation of China (31870456)
National Natural Science Foundation of China (31700449)
National Natural Science Foundation of China (31770500)
the Fundamental Research Funds for Central Universities (2412018ZD010)
A grant from State Key Laboratory of Grassland Agro-Ecosystems (780000-04410101)
Article History
Received: 22 March 2019
Accepted: 19 December 2019
First Online: 4 January 2020