پديد آورنده :
نورمحمدي، اعظم
عنوان :
تغذيه سطوح مختلف جرم ذرت و تاثير آن بر عملكرد گاو هاي شيري هلشتاين تغذيه شده با نشاسته زياد
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
ده، ۵۹ص.: مصور، جدول
استاد راهنما :
غلامرضا قرباني، مسعود عليخاني
استاد مشاور :
علي صادقي سفيدمزگي
توصيفگر ها :
جرم ذرت , نشاسته جيره , عملكرد گاوهاي شيري
استاد داور :
ابراهيم قاسمي، حميدرضا عشقي زاده
تاريخ ورود اطلاعات :
1396/12/07
چكيده انگليسي :
60 Feeding Different Levels of Corn Germ on the Performance of Holestein Diary Cattle Fed High Starch Diet Azam Noormohammadi a noormohammadi@ag iut ac ir January 14 2018 Department of Animal Science Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor Gholam Reza Ghorbani ghorbani@cc iut ac ir Masoud Alikhani alikhani@cc iut ac irAbstractThe objective of this study was to evaluate the effects of dietary starch level on performance feed intake nutrient digestability nitrogen efficiency feeding behavior and income over feed cost of Holstein dairycow in early lactation Nine multiparous early lactating Holstein cow with 65 6 8 5 DIM averagemilk yield of 55 6 4 5 and the average body weight of 611 3 43 3 kg mean SD were usedin a 3 3 latin square design with 21 d periods Each period consisted of 16 d of adaptation followed by 5d of data collection Different dietary starch were made by replacing corn grain by corn germ Treatmentdiets were control alternative diet replacing corn grain with corn germ completly andbalanced treatment replacing corn grain with corn germ and balanced The control alternateand balanced diets contained 30 2 24 3 and 24 8 starch DM basis respectively Control andbalanced diets were isoenergetic 1 6 Mcal kgDM Decreased dietary starch by replacing corn grainwith corn germ had no effect on the proportion of the particles retained on the two top sieves of the PSPS 19 mm and 8 mm but proportion of the particles retained on the 1 18 mm sieve and pen wereaffected by treatments P 0 01 so peNDF 1 18 increased by replacing corn grain by corn germ P 0 01 Reducing dietary starch had a significant effect on milk yield 3 5 FCM ECM production ofprotein and lactose The highest milk yield observed in the alternative diet with 56 6 kg day and thelowest in control with 53 7 kg day while percentage of fat protein lactose and SNF were unaffectedby treatments Decreasing dietary starch had no effect on dry matter intake P 0 1 and as a result feedefficiency MY DMI 3 5 FCM DMI was unaffective too Total tract digestability of DM and OMhad a tendency to redused by decreasing starch content of diets Rumen pH unaffected by treatmentswhile feces pH had a tendency to increase by reducing starch content of diets Body weight unaffected bytreatments while body condition score and back fat thickness were affected by treatments P 0 05 Plasma BHBA NEFA and glucose were not affected by treatments but plasma cholesterol increased withredusing dietary starch p 0 04 Price of diet with reduced starch content of diet decreased rials kgDM so the highest income observed in alternative diet The results suggest that reduced dietary starchfrom 30 2 to 24 8 by replacing corn grain with corn germ in high concentrate diets can successfullysupport performance of high producing Holstein cows in early lactation Keywords Corn germ Diet starch Dairy cow Performance
استاد راهنما :
غلامرضا قرباني، مسعود عليخاني
استاد مشاور :
علي صادقي سفيدمزگي
استاد داور :
ابراهيم قاسمي، حميدرضا عشقي زاده
