College of Resources and Environmental Engineering, Yibin University;
U.S.Department of Agriculture, Agricultural Research Service, Forage and Range Research Laboratory, Utah State University;
College of Resources and Environmental Engineering, Yibin University;
U.S.Department of Agriculture, Agricultural Research Service, Forage and Range Research Laboratory, Utah State University;
College of Resources and Environmental Engineering, Yibin University;
U.S.Department of Agriculture, Agricultural Research Service, Forage and Range Research Laboratory, Utah State University;