Effect of Silage Rape on Sperm Quality of Breeding Bulls
In order to study the effect of adding silage rape to the basal diet on the sperm quality of breeding bulls,15 Simmental and Charolais breeding bulls with similar body weight(897.45±25.45)kg and age were selected and randomLy divided into the control,NT1 and NT2 groups,with five replicates in each group.The control group was fed a basal diet,while the NT1 and NT2 groups were fed 20%and 30%silage oilseed rape in equal parts to replace the lamb grass in the basal diet,respectively.The experiment was conducted from April to July 2023 with a pre-test period of 15 d and a main test period of 60 d.The results of the experiment were summarized as follows.The results showed that feeding breeder bulls with a compound feed made from 20%silage rape replacing fescue in the basal diet significantly increased frozen sperm viability and forward motile sperm counts(P＜0.05),but was inferior to breeder bulls fed the basal diet in controlling deformity rate and bacterial counts.
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