9065

8410

كارشناسي ارشد

علوم دامي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1392

يازده،46ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

احمد رياسي، سعيد انصاري

غلامرضا قرباني

2/4/93

ابراهيم قاسمي، جمشيدرزمجو

مهندسي كشاورزي

ID8410

47 Effect of Slow Relasing Bolus Containing Mineral vitamin Supplements and GnRH and hCG Hormones on Reproduction Performance of High Yielding Holstein Dairy cows Shahram Nazari Shahram nazari25@yahoo com Date of Submission 24 February 2014 Department of Animal Science Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor A Riasi ariasi@cc iut ac irAbstractVitamin and mineral deficiency in dairy cattle cause a lot of damages to milk productionand reproduction efficiency Reduced fertility of dairy cattle has a lot of economic lossesfor cattlemen In this study has been dedicated to consider the reproduction and metabolicresult of using oral bolus containing vitamins and minerals with or without injecting hCGand GnRH hormones For this purpose 36 dairy cattle have been selected producing morethan 11000 liters of milk and with parity in the previous 305 day peroid from one of theunits located around Qom The selected cattle have been randomly categorized into 4groups so that in each group cattle were equal in the average of parity 2 5 and milkproduction 11000 liters The groups were as follows 1 without using bolus and hormone control 2 using mineral vitamin bolus 3 injecting GnRH and hCG 4 using mineraland vitamin bolus and injecting GnRH and hCG 2 edible slow released bolus containingminerals copper 16379 cobalt 234 selenium 251 manganese 8326 zinc 13382 iodine 497 milligram and vitamins vitamin A 549408 vitamin D 109881 vitamin E 1099 international units have been used for each cattle 5cc and 1500 international units ofGnRH on the day of artificial insemination and hCG 11 days after artificialinsemination hormones have been injected intra muscularly with the following trademarksrespectively Vetospet Pergenil Cattle with an average physical score of 3 5 have beendedicated to the experiment and that physical score was determined 30 or 60 days aftergiving birth All the cattle in this experiment have been considered by farm veterinarian inthe forth fourth week after birth from the view point of returning uterus to its initial stateand probable occurrence of uterine infection and establishment of ovarian activity Cattle sblood samples were taken in the day of artificial insemination and 12 days after that todetermine the density of progesterone Results have shown that the density of progesteronein blood Ng in milliliter was more among those cattle that received hormones in the dayof artificial insemination and 12 days after that p 0 001 Reduction of score has beenmore among those that received plows supplement than others p 0 001 Using bolus hada significant effect on cows at the time of the first stallation Results relevant to cumulativepregnancy rate showed that using bolus caused pregnancy of more cows in the third turn ofinsemination There were no differences between cows in the experiment such as openeddays conception rate the percentage of being effected by metabolic disease in experimental treatments did not differKey words Oral bolus progesterone dairy cattle and Reproductive parameters

احمد رياسي، سعيد انصاري

غلامرضا قرباني

ابراهيم قاسمي، جمشيدرزمجو