Abstract: 【Objective】To clarify the relationship between the ecological stoichiometric characteristics of forages and the feeding behavior of Dasyhippus barbipes,so as to provide ecological and chemical theory basis for grassland locust disaster management.【Methods】The effects of artificial feed with different ratios on the survival duration and feeding behavior of Dasyhippus barbipes were analyzed by setting up nitrogen∶carbon series（7∶35,14∶28,28∶28,28∶14,35∶7）and sucrose∶starch series（0∶50.0,12.5∶37.5,25.0∶25.0,37.5∶12.5,50.0∶0）. At the same time,the split zone design was used to test the nutrient contents of Leymus chinensis and Stipa krylovii. The treatments of grazing×no water replenishment,grazing×water replenishment,no grazing×no water replenishment,and no grazing×water replenishment were set up. The contents of C,H,N and S in Leymus chinensis and Stipa krylovii were analyzed,and the total carbon to nitrogen ratio（C∶N）and the total carbon to hydrogen ratio（C∶H）were calculated.【Results】In the artificial feed experiment,in terms of survival duration,the average survival duration of female Dasyhippus barbipes was 13.7 days and that of male was 11.5 days. The average survival duration of female Dasyhippus barbipes was longer than that of male. In terms of body weight growth rate,the presence of the peak of body weight growth rate of male Dasyhippus barbipes was earlier than that of female. Male Dasyhippus barbipes had better performance in development in the early stage of feeding,and female had better performance in development in the late stage of feeding. In terms of feeding behavior,among the nitrogen∶carbon series of artificial feed,the order of female Dasyhippus barbipes feeding amount was 14∶28>7∶35>28∶14>28∶28>35∶7,and that of male feeding amount was 14∶28>35∶7>28∶28>28∶14>7∶35;among the sucrose∶starch series of artificial feed,the order of female Dasyhippus barbipes feeding amount was 12.5∶37.5>37.5∶12.5>25.0∶25.0>50.0∶0>0∶50.0,and that of male feeding amount was 12.5∶37.5>50.0∶0>25.0∶25.0>37.5∶12.5>0∶50.0. Compared with the treatments of no grazing×no water replenishment and no grazing×water replenishment,the treatments of grazing×no water replenishment and grazing×water replenishment significantly（P<0.05）increased the total contents of C and N in Leymus chinensis. Compared with the treatment of grazing×no water replenishment,the treatment of grazing×water replenishment significantly（P<0.05）increased the total contents of N and C∶ N,and significantly（P<0.05）reduced the total contents of S in Leymus chinensis. The treatments of grazing×no water replenishment and grazing×water replenishment significantly（P<0.05）increased the total contents of C,extremely significantly（P<0.01）increased the total contents of N,H and S,and extremely significantly（P<0.01）reduced C∶N in Stipa krylovii.【Conclusion】Both female and male Dasyhippus barbipes preferred the feed with nitrogen∶carbon of 14∶28;female disliked the feed with nitrogen∶carbon of 35∶7,and male disliked the feed with nitrogen∶carbon of 7∶35. Both female and male Dasyhippus barbipes preferred the feed with sucrose∶starch of 12.5∶37.5,and disliked the feed with sucrose∶starch of 0∶50.0. Grazing and water replenishment ameliorated the nutritional components of Leymus chinensis and Stipa krylovii,and grazing had greater impact in comparison with water replenishment.

Key words: Dasyhippus barbipes, Artificial feed, Leymus chinensis, Stipa krylovii, Nutrient content, Carbon and nitrogen content, Sucrose, Starch