تاثير استخدام التبن المعامل بالشرش واليوريا بنسب مختلفة في اداء الحملان العزابية الدكزية == Effect of the Using of Different Rates of Straw Treated with Whey and Urea on the Performance of Male Arabi Lambs
Author name:
محمد صبيح مجيد مريوش الساعدي
Supervisor name:
عماد فلاح حسن الجاسم
General topic:
Agricultural sciences
Specific topic:
Zoology
Degree:
Master
University:
University Of Basrah - Faculty Of Agriculture
Language:
Arabic
University location:
Basrah
First pages:
31T1856 - p.pdf
Abstract:
The present study was conducted at Animal Farm/College of Agriculture/ University of Basra during 20/11/2014 to 18/2/2015. The aim was to clarify the effect of using straw treated with whey and urea at different levels on some productive and physiological traits of male Arabi lambs. A total of 16 male lambs were used aged 6 - 7 months with an average weight of 30.50±1.65 Kg. the lambs were distributed randomly and equally to four treatments. Concentrate diet included barley (55%), wheat straw (43%), vitamin and minerals (1%), urea (0.5%) and salt NaCl, (0.5%). Lambs were fed at 3% of their live body weight with adjustment depending on body weight change through the study period to every treatment (every two weeks). The residual feed was collected every following morning to measure the consumption feed. Ration of each treatment was as follow : 1 - First treatment : 100% concentrate diet.2 - Second treatment : 90% concentrate+10% straw treated with whey and urea.3 - Third treatment : 80% concentrate+20% straw treated with whey and urea.4 - Four treatment : 70% concentrate+30% straw treated with whey and urea.The studied productive traits were live weight, daily and total growth rates, feed consumption and feed conversion ratio, carcass traits (hot carcassweight, dressing%, cuts weight, carcass offal, internal organs weight, abdominal, heart, kidney, pelvic and tail fat weight with physical dissection of rib cut and measurement of meat, bone and fat%). Organoleptic test included color, flavor, tenderness, juiciness and total acceptance. Blood biochemical traits included total protein, glucose, cholesterol, triglycerides, serum urea and some hormones as growth and thyroxine hormones. Results can be summarized as follow : 1 - There were significant differences in final body weight and daily and total growth rate of lambs of second group, which was fed 10% treated straw with whey and urea in comparison with other groups.2 - Significant improvement in feed conversion ratio of lambs of 2nd group in comparison with other groups as well as there was an increase in feed consumption of lambs of 2nd and 3rd groups.3 - There were significant differences in hot carcass weights of 2nd group in comparison with other groups as well as dressing% of lambs of control and 2nd group in comparison with other groups.4 - Lack of significant differences among treated groups in the cases of cut weights, weight and % of meat, fat and bone of rib cut, external body offal, internal organs and some body fat depots.5 - Significant differences in tail weight of 2nd group and abdominal fat of 2nd and 4th groups in comparison with other groups were observed.6 - There were significant improvement in some organoleptic test as flavor and total acceptance of groups received straw treated with both 10% or 20% whey and urea in comparison with control group.7 - There was a significant increase in total proteın concentration in blood serum of lambs of 2nd and 3rd group in comparison with other groups. There was also a significant difference in serum urea concentration of lambs of 2nd, 3rd and 4th groups in comparison with control group.8 - Neither signifcant differences were found in cholesterol, glucose, triglyerides nor in growth and throxine hormones among studeid groups.
