FARRAG, A., SERUR, B., GOM, A. (1986). REPRODUCTIVE PERFORMANCE OF IMPORTED FRIESIAN CATTLE IN UPPER EGYPT. test, 15.2(30), 234-240. doi: 10.21608/avmj.1986.189926
A.A. FARRAG; B.H. SERUR; A. GOM. "REPRODUCTIVE PERFORMANCE OF IMPORTED FRIESIAN CATTLE IN UPPER EGYPT". test, 15.2, 30, 1986, 234-240. doi: 10.21608/avmj.1986.189926
FARRAG, A., SERUR, B., GOM, A. (1986). 'REPRODUCTIVE PERFORMANCE OF IMPORTED FRIESIAN CATTLE IN UPPER EGYPT', test, 15.2(30), pp. 234-240. doi: 10.21608/avmj.1986.189926
FARRAG, A., SERUR, B., GOM, A. REPRODUCTIVE PERFORMANCE OF IMPORTED FRIESIAN CATTLE IN UPPER EGYPT. test, 1986; 15.2(30): 234-240. doi: 10.21608/avmj.1986.189926

REPRODUCTIVE PERFORMANCE OF IMPORTED FRIESIAN CATTLE IN UPPER EGYPT

Assiut Veterinary Medical Journal
Article 28, Volume 15.2, Issue 30, January 1986, Pages 234-240    PDF (1.93 M)
Document Type: Research article
DOI: 10.21608/avmj.1986.189926
Authors
A.A. FARRAG; B.H. SERUR; A. GOM
Abstract
The breeding records of 238 primiparous Friesian cows bred. at Abnoob El-Hammam dairy farm (Assiut) were studied. The obtained results showed that the average postpartum breeding interval was 111.17+50.99 days. The longest period (113.05 days) was observed during Winter and the shortest was observed during Summer. There was a statistically significant (P/ 0.05) difference between the different seasons studied. Conception rate to service during the first postpartum heat was highest (55.36%) during Winter and Lowest during summer (44.0%). The average postpartum breeding interval was shortest (97.22 days) in animals which gave their first calf at an age less than 24 month. Male calves were heavier (29.63 kg) than female calves (28.97 kg).
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