College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
College of Natural Resources and Environment Northwest A & F University Yangling 712100 China;
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China Ministry of Agriculture Yangling 712100 China;