Pengaruh Umur Terhadap Ukuran Epididimis, Abnormalitas Spermatozoa Dan Volume Semen Pada Sapi Simmental Di Balai Inseminasi Buatan Ungaran (the Effect of Simmental Bull Ages on Epididymis Size, Sperm Abnormality and Semen Volume at Ungaran Artificial Inse

The purpose of this research was to know the effect of Simmental bull ages on epididymis size, sperm abnormality and semen volume at Ungaran Artificial Insemination Centre. Materials used were 15 Simmental bulls categorized by bull ages, namely 4 bulls of T1=<36 months, 7 bulls of T2=36-<72 months and 4 bulls of T3=72-<108 months. Parameters observed were epididymis size (the length of caput, corpus and cauda), sperm abnormality and semen volume. The result showed there was no significant difference between bull ages on epididymis size (the length of caput, corpus and cauda) and semen volume. Bull ages showed significant difference (P<0.05) on sperm abnormality between T2 and T3. The conclusion showed that there was no significant difference between bull ages on epididymis size and semen volume but showed significant difference on sperm abnormality. Simmental bull with 36 - <72 months ages had the best sperm's quality