Funding for this research was provided by:
The Major Project of the National Social Science Foundation of China (No. 15ZDA052)
National Soft Science Project of State Forestry and Grassland Administration (No. 2019131039)
the Key Special Funds of Ministry of Agriculture and Ministry of Finance (Grant No. CARS-07-F-1)
the Key Project of Six Industrial Research Institutes of Northwest Agricultural and Forestry University (Grant No. Z221021601)
Major Research Project of County Economy in Shaanxi Province (No. 2019XY012)
Scientific Research and Innovation Projects of Northwest A&F University (No. JGYJSCXXM202001)
Article History
Received: 15 March 2021
Accepted: 18 June 2021
First Online: 17 July 2021
Declarations
:
: “Not applicable” for that section.
: “Not applicable” for that section.
: “Not applicable” for that section.
: The authors declare no competing interests.