REPRODUCTIVE PERFORMANCE OF NEW ZEALAND WHITE BUCKS FED DIETS CONTAINING DIFFERENT TYPES OF SILAGE. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 8, Volume 30, Issue 4, April 2005, Page 1983-1995 PDF (757.83 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2005.237979 | ||||
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| Authors | ||||
| A. E. Abdel-Khalek,1; M. A. Abu EI-Hamd2; M. E. Omara2 | ||||
| 1Dept. of Animal Production, Faculty of Agric, Mansoura University. | ||||
| 2Animal Production Research institute, A.R.C., Ministry of Agriculture. | ||||
| Abstract | ||||
| This study aimed at investigating the effects of feeding mate rabbits on diets containing different types of silage on attainment of puberty at 16 weeks of age and semen quality at 24 weeks of age. A total of 45 NZW male rabbits (6 weeks old) were allotted into 5 similar groups fed 100% complete feed diet (CFO) and was served as control group ((31) as compared to those fed 70% CFD and different types of silage (30%) including carrot roots (62). carrot tops (G3). berseem (G4) and corn (GS) silages. All groups were fed on the tested rations from 5 weeks of age up to 34 weeks of age. At 16 weeks of age (expected age of puberty), results showed insignificant differences in testosterone concentration among the experimental groups, although there was a tendency of higher values in 62 and 65 than those in G3. (34 and G1. On the other hand. the testicular weight showed significantly the highest values in G5 and the lowest values in (33. However, males in the other groups showed moderate testicular weights. On the basis of the histological examination. testis in G4 and GS had more developed testicular findings than that in control and GS. which showed developing testes. However, testes of males in G2 showed moderate findings. At 24 weeks of age (Mature age). bucks in GZ and (35 showed significantly the highest sperm cell concentration. and percentages of mass motility and live spermatozoa as well as the lowest sperm abnormality percentage. However, ejacuiate volume did not differ significantly as affected by dietary treatment groups. Reaction time was significantly the shortest in GS (43 sec) and 62 (42.8 sec), followed by G4 (49.5 sec). while GS and Gt showed significantly the longest reaction time (57.5 and 59.7 sec. respectively). Total number of spermatozoa as well as live. motile and normal spermatozoa per ejaculate was significantly higher in G2, G4 and G5 than those in (31 and GS. Conception rate was higher in Gt. G2. G4 and GS than (33 (100 vs. 60%). in conclusion, the current study indicated the possibility of feeding bucks on diets containing, 30% from each of corn. carrot roots or berseem silage to attained eariy puberty in male rabbits without reversible effects on their semen quality. sexual desire and conception rate at mature stages. | ||||
| Keywords | ||||
| Rabbit. silage. puberty. semen; quality. conception rate | ||||
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