The aim of the present study was to evaluate the effect of the partial replacement of berseem hay (BH) by untreated and treated Conocarpus (CO) with Trichoderma reesi fungi (TR) and Effective microorganisms (EM1) on reproductive performance of Baladi Black (BB) rabbits. A total number of 105 does and 35 bucks BB, rabbits were randomly divided into seven dietary treatment groups (15 does + 5 bucks rabbits, each). Rabbits in the first group were fed a commercial pelleted diet was contained 25% berseem hay as a control group, while in the other six group rabbits fed diets contained 3.75 and 7.5% untreated and treated (CO) with Trichoderma reesi fungi (TR) or Effective microorganisms (EM1) to substitute 15 and 30% of BH of control ration.
The results show that rabbits fed diets contained 15% CO+ EM1 and 15 or 30 % CO+TR replacement of BH significantly (P≤ 0.05) had higher weights for pregnancy, kindling and weaning stages compared to those on other dietary treatments. Moreover, feeding the does on diets contained 15% CO+EM1 and with 15 or 30 % CO+TR replacement of BH significantly (P≤ 0.05) gave the highest milk yield and content of dry matter, crude protein and fat compared to the other dietary treatments. Alike, the performance of the litters followed that obtained with corresponding does, where diets contained 15% CO+EM1 and with 15 or 30 % CO+TR replacement of BH significantly (P≤ 0.05) a cleaved the best figures for litter size of and weights from birth up to weaning that in turn revealed significant (P≤ 0.05) decreased in mortality rate (%) as compared to other dietary treatments. Nutrient digestibility coefficients were not significantly affected by dietary treatments. Values of total digestible nutrients (TDN) were significantly (P≤ 0.05) improved with dietary manipulation especially with fungal enrichment.
Economically fortification of conocarpus diets with bacterial or fungal treatments gave higher net revenue compared to non- treated or the control diet.
Conclusively, it could be concluded from the present study that replacing 15% and 30% of berseem hay by biological treated conocarpus with fungi (Trichoderma reesi) or Effective microorganisms (EM1) in Baladi Black (BB) rabbit does diets, resulted in improve their reproduction performance without any adverse effect on physiological responses with high profitability under Egyptian conditions.