تاثير برخي مكمل هاي معدني - ويتاميني بر فراسنجه هاي توليد و توليد مثل گاوهاي دوره انتقال در فصل تابستان

چكيده انگليسي :

56 Effect of Some Trace Mineral Vitamin Supplements on Production and Reproduction Parameters of Transition Dairy Cow in Summer Season Simin Khorsandi Simin Khorsandi@gmail com Date of Submission 17 September 2012 Department of Animal Science Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor A Riasi ariasi@cc iut ac ir M Khorvash mkhorvash @cc iut ac ir Abstract This study was conducted to evaluate the effects of some nutritional and injectable mineral vitamin supplements on transition dairy cows in summer season One hundred high yielding multiparous Holstein cows were randomly assigned to four groups 25 cows per treatment The treatments were consisted of 1 control 2 injection of Se vitamin E supplement 3 Feed minerals vitamins bolus supplement and 4 injection and feed mineral vitamin supplements The injectable supplement was contained vitamin E and Se and the dietary bolus was contained Cu Co Se Mn I Zn and vitamins A E and D3 The cows were assigned to the treatments approximately 21d before calving time Total mixed rations TMR were formulated according to dairy cow requirements in NRC 2001 Immediately after parturition the colostrum samples were collected Milk samples obtained from daily three times milking and repeated weekly until 9th week Blood samples collected from cows at 3 0 4 and 8 week from parturition Reproductive events such as days to first service open days services per conception and conception rate were recorded The results showed nutritional bolus increased P 0 05 milk yield of cows The group supplemented with injectable vitamin E Se along nutritional bolus had higher P 0 05 milk protein yield kg d The treatments affected milk solids non fat and the control group had lower content P 0 05 than others The nutritional bolus decreased P 0 05 and injectable Se vitamin E increased P 0 05 milk somatic cell score SCS compared to control group The treatments only affected the colostrum fat content however there were no effect on the other colostrum compositions or IgG concentration Beta hydroxybutyrate and NEFA were the lowest P 0 05 in group which received injectable and nutritional bolus supplement and negative energy balance was reduced Nutritional bolus or injectable supplement had no effect on concentration of T3 and T4 hormans Nutritional bolus increased P 0 05 total blood protein at parturition time The group supplemented with injectable vitamin E Se along nutritional bolus had higher triglyceride in the first month of lactation P 0 05 The treatments had no effect on blood urea nitrogen Nutritional bolus or injectable supplement had no effect on days to first service Feeding nutritional bolus decreased P 0 05 open days and tended to decreased services per conception Nutritional bolus increased P 0 05 first services conception rate The group supplemented with injectable vitamin E Se and nutritional bolus had the highest P 0 05 cumulative pregnancy rate Using the nutritional bolus decreased P 0 05 the service needed for pregnancy After the first and second services the group supplemented with nutritional bolus had the highest P 0 05 percentage of pregnancy It was concluded that mineral vitamin nutritional bolus with or without injectable Se vitamin E had potential to increase reproductive performance of high producing dairy cows during warm season It was concluded that the nutritional bolus with or without injectable supplement had positive effects on milk and milk components colostrum composition negative energy balance some of blood metabolic profile and reproductive performance in high production dairy cows Keywords Transition cow Heat stress Mineral vitamin supplements Milk production Blood metabolites Reproduction

خورسندي، سيمين

تاثير برخي مكمل هاي معدني - ويتاميني بر فراسنجه هاي توليد و توليد مثل گاوهاي دوره انتقال در فصل تابستان

توليد شير , متابوليت هاي خون