Funding for this research was provided by:
the National Key Research and Development Program of China (2016YFC0500602)
National Natural Science Foundation of China (31570470, 31870456, 31700449, 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