Abstract: Chemical compositions and its dynamic changes of Mogolian Gobi Red Bactrian Camels were studied. Colostrum and milk samples from ten nomadic females camel at their first season of lactation were collected periodically from parturition until 90 d post partum (PP). The total solids, protein, fat and ash content in Mongolian Gobi Red Bactrian Camel colostrums, which was collected first time postpartum, were 20.858%, 14.864%, 0.278% and 1.281%, respectively. However, the content of these compositions were changed according to lactation time. The total solids content was 17.858% to 17.323% from 2h to 30th d postpartum, but it was decreased to 14.488% at 90th d postpartum. The protein content was decreased to 8.153% at 24th h postpartum, and continually decreased according to the lactation time. The fat content was increased to 4.259% at 24th h postpartum and 6.852% at 30th d postpartum, but decreased to 5.705% at 90th d postpartum. The ash content was decreased to 0.918% at 24th h and stabilized during 0.82% to 0.98% in whole left lactation time. Variation of lactose content was little (4.35 to 4.65%) throughout the study period. The levels of Ca and P were 216 and 154.3 mg/100 g, respectively, in first time collected postpartum; the variation in Ca, P, Na, K and Cl levels in study period were 156.3～192.2 mg/100 g, 126.8～154.3 mg/100 g, 60.0～83.0 mg/100 g, 126.8～184.2 mg/100 g and 85.6～193.2 mg/100 g, respectively. The levels of VA, VC, VD, VE, VB1, VB2 and VB6 were 0.918 mg/L, 15.845 mg/L, 627 IU/L, 1.800 mg/L, 0.188 mg/L, 1.188 mg/L and 0.495 mg/L, respectively.

Key words: Gobi Red Bactrian Camel, chemical compositions of milk, dynamic changes