Research Of Program Artificial Insemination Optimization On Tibet Yak

The Program Artificial Insemination is an important technique in the industrialized production of cattle. This paper studied on Program Artificial Insemination optimization of Tibet Yak feeding in Long Ren breeding pasture land and around herdmen's tangeland in DangXiong under natural environment. Eighty-nine healthy Yak were assigned randomly to three treatment groups in this experiment. GroupⅠ CUE-MATE+EB+P4+D-PG;Group:Ⅱ"YangLe"+EB+P4+D-PG;GroupⅢ:CUE-MATE+EB+P4+D-PG+LRH-A3.The results were as follows:(1)The results indicated that the treatment of CUE-MATE+EB+P4+D-PG+LRH-A3brout high estrus rate (93.1%) during reproduce season of yak. Significant difference was observed between Group Ⅰ and Group Ⅱ, Group Ⅱ and Group Ⅲ for the rate of synchronized estrus(P<0.05), however, there were no differences(P>0.05) in the rate of synchrionized between GroupⅠ and Group Ⅲ.(2) Artificial Insemination (AI) was curried out respectively after treatment finished56-61h for all the yak in Group Ⅰ.Ⅱ andⅢ. There was no difference(P>0.05) in the rate of AI between GroupⅠ and GroupⅡ, however, significant differences were observed between Group Ⅰ and Group Ⅲ. GroupⅡ and GroupⅢ (P<0.05).(3) The conception rate of GroupⅠ.Ⅱ and Ⅲ were63,64%,32.26%,65%respectively, the final conception rate of Group Ⅰ.Ⅱ and Ⅲ were62.96%,42.86%,73.68%respectively. There were no differences(P>0.05) in the conception rate between Group I and Group Ⅱ. Group I and Group Ⅲ. however, significant difference was observed between Group Ⅱ and Group Ⅲ (P<0.05). Therefore, the good timing for Al was advised that after the treatment finished56-61h for all the yak in Oestrous Synchronization.The results indicated that the Program Artificial Insemination used in the present experiment had high estrus rate during the reproduce season of yak. especially the program III was suitable to widely apply in the production of yak for its firm and pretty effect.