Efficiency Of Artificial Insemination And Optimum Time Of Insemination On Swamp Buffalo (Author: Dinh Van Cai , Nguyen Huu Tra, Luu Cong Hoa, Thai Khac Thanh, Han Quoc Vuong, Hoang Khac Hai and Le Tran Thai)

Dinh Van Cai , Nguyen Huu Tra, Luu Cong Hoa, Thai Khac Thanh,

Han Quoc Vuong, Hoang Khac Hai and Le Tran Thai

Summary

One hundred and seven normal estrus buffaloes raising in small-houder farms (Nghe An province 40, Thanh Hoa 40 and Thai Nguyen 27) were allocated to one of three different treatment groups to find the efficacy of AI and optimum time of AI. The group A (n=29) received AI  at the time 12-18 h, group B (n=46) AI 18-24 h), group C (n= 32) AI 24-32h after the detection of heat signs. This study revealed that the pregnancy percentage  of the first, second and third  service were (35/107) 32.71; (17/41) 41.46% and (2/5) 28.57% respectively, the average percentage were (55/154) 34,84%. No significant difference between service (P=0.569) was tested by chi-square. The pregnancy rates of buffaloes from three service of groups B> A> C were (28/46) 60.87%; (15/32) 46.87% and (11/29) 37.93% respectively (P= 0,137), the average percentage were (54/107) 50,46%. Pregnancy percentages for the groups inseminated one dose of semen was (34/71) 47,89% lower than that in groups inseminated two dose (20/36) 55,56% (P= 0.453). The percentage of  pregnancy buffaloes AI twice with interval 6-9h were higher than that interval 10-13h. From the results, It is concluded that optimum time of AI from 18-24h after the detection of heat signs and AI twice with interval 6-9h could be used to increase pregnancy rate in buffaloes. 

Keywords: Effeciency of AI, Optimum time of AI; Pregnant  rate, Swamp buffalo,.

From: Vietnam Journal of Agriculture & Rural Development

The Eleven year No. 182 – 2011, page 80-84

Author: PGS.TS. Dinh Van Cai. Email: dinhvancaiias@yahoo.com.vn