College of Veterinary Medicine;
Northwest A&F University;
Yangling 712100;
P.R.China;
Tibet Agriculture and Animal Husbandry College;
Linzhi 860000;
P.R.China;
Xi'an Municipal Public Security Bureau;
Xi 'an 710000;
P.R. China;
Eco-Toxicology Institute;
Northwest University;
Xi'an 710000;
P.R.China;
中国西部; 草地; 杂草生长; 控制; 危害; 毒草; 自然生态环境; 西部草原;