Effects of Multi-enzyme Feed Additive “Kemzyme” or/and Sodium Bentonite “as a Feed Binder”on Sexual Activity and Some Fertility Parameters of Rabbit Bucks

The present study was conducted to clarify the effect of Kemzyme or Bentonite and their mix as feed additiveson the main semen characteristics, testicular enzyme markers, plasma testosterone level and fertility indices ofbucks. Twenty four mature NZW rabbit bucks of about 4-month age and average body weight 2.400 kg wereequally divided into four groups (6 in each). The first group was kept untreated (C). The second group (K) wassupplemented with 0.1% “Kemzyme”, a multi-enzyme. The third group (B) was supplemented with 2% sodiumbentonite while the fourth group (KB) was supplemented with Kemzyme plus bentonite. The dietary treatmentlasted for 10 weeks to cover a complete spermatogenic cycle. Results obtained revealed better sexual activity andhigher libido of (K) and (KB) bucks. Besides, significant improvement in their different semen parameters, blood testosterone level, seminal total lipids concentration and the activities of different seminal enzymes. Suchimprovement was complementary to the higher fertility indices that also noticed on bucks of the same groups. Practically, it could be considered that (K) supplementation is a good reproductive promotant tool in the field ofrabbit production