This experiment was conducted to examine the fertilising ability of layer breeder cock spermatozoa extended with normal saline fortified with varying levels of carrot juice using 10 breeder Bovan Nera cocks. Semen was collected from the cocks, pooledand divided into six portions (treatments). Treatment 1(TUS) was undiluted semen which served as a control, while Treatments 2 (TNS) and 3 (TMRS) were diluted at 1:1 with normal saline and modified ringer solution, respectively. Treatments 4 (T25%CJ), 5(T50%CJ), and 6 (T75%CJ) were diluted at 1:1 with normal saline fortified with 25%, 50% and 75% carrot juice, respectively, and stored at room temperature (27.0±0.2 ). Sperm motility and liveability reduced (p<0.05) as time of storage increased. in vivostudy was carried out with 70 hens randomly allocated and inseminated with each of the 5 treatments. The fertility among the treatments was 75% (TNS), 100% (T2), 60% (T3), and 83.33% (T4), while optimum of 60% at day 3 and 50% at day 7 were obtained forT3 and T5 respectively. Duration of fertile period was prolonged by carrot juice for T50%CJ and T75%CJ respectively by 2 and 3 days relative to TNS and 5-6 days for TMRS. Embryonic mortality and hatchability were similar among the treatments.
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