نوع مقاله : مقاله پژوهشی
نویسندگان
1 فارغ التحصیل دکتری، گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری
2 دانشیار، گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی
3 استاد ، گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی
4 استادیار ، گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Background and objectives: Ruminal contents are the nutrients consumed by the animal prior to slaughter, which is processed almost exclusively by rumination and exposure to the various enzymes and protozoa present in the rumen and a complete, ready-to-digest feed. It can be re-fed to ruminant animals when it is processed. The use of digestive remains of slaughter cattle can be a cheap, nutritious, and always available alternative to concentrate replacement. Therefore, the purpose of this study was to investigate the potential of replacing rumen contents of cattle and sheep as an alternative feed on growth performance, carcass quantitative and qualitative traits and some blood parameters of Dalagh fattening lambs.
Materials and methods: To do this study 24 Dalagh fattening male lambs were investigated at the age of 4.5 months with a mean live weight (27 ± 2.0 kg) to 6 treatments and 4 lambs (replication) in individual cages for 90 days. Experimental treatments consisted of: 1) control treatment, without rumen contents of cattle and sheep, 2) treatment 15% rumen contents of cattle, 3) treatment 30% rumen contents of cattle, 4) treatment 15% of sheep contents, 5) treatment 30% of sheep contents, and 6) treatments containing 15% of rumen contents of cattle and 15% of sheep contents.
Results: The results of growth performance showed that there was a significant difference between the treatments at the end weight of feed, daily gain and FCR (P <0.05). The highest daily weight gain and final feed weight as well as the improving feed conversion ratio were observed in the treatments 30% rumen content of sheep.The results of body biometric showed that body length was significantly higher in the treatments 30% rumen content of sheep than control treatment (P <0.05). The results of quantitative carcass traits showed that treatment 30% rumen content of sheep in hot carcass weight, cold carcass weight, crustacean were significantly higher than control treatment (P <0.05).
The results of some blood parameters of day 90 showed that there was a significant difference in the concentrations of glucose, cholesterol, BUN and total protein between the experimental treatments (P <0.05). So, in the treatment 30% of rumen contents of sheep the concentration of the desired parameters were higher.
Conclusion: The results of this study showed that the use of rumen dried contents in fattening lamb diets was effective in improving growth performance especially live weight gain, FCR and carcass traits. Consumption of dried rumen contents of sheep also had a significant effect on some blood parameters of experimental lambs. Also, 30% of rumen contents of sheep had better performance than other levels.
کلیدواژهها [English]