پديد آورنده :
حسيني غفاري، مرتضي
عنوان :
اثر دو روش خشك كردن بر ميزان عفونت درون پستاني در گاوهاي با دوره خشكي كوتاه
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
نه، 66، [II] ص: جدول
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
غلامرضا قرباني، حميد رضا رحماني
استاد مشاور :
مهدي محمد علي پور، مسعود عليخاني
توصيفگر ها :
لاكتوفرين , منوسيت ها و ماكروفاژها , ايمونوگلبولين ها , لنفوسيت ها , سلولهاي سوماتيك
تاريخ نمايه سازي :
20/4/86
استاد داور :
محمد خوروني، محمد فضيلتي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
Abstract A study was conducted in order to determine the effect of drying off methodsintermittent vs abrupt on intramammary infection rate in multiparous Holstein cowswith short dry period Twenty late lactation dairy cows were dried off approximately4 wk prior to expected calving time Treatments were arranged in a completelyrandomized design with 2 treatments and 10 Replicates Dry period lengths were30 3d The two drying off methods abrupt AD or intermittent ID were used inthis study In intermittent milk cessation treatment cows were dried off in followingmanner Afternoon milkings were terminated 7d to 3d prior to drying off and bothnoon and afternoon milking were ceased 3d to 0d prior to drying off Milk sampleswere collected from front and rear quarters at 7d to 3d prior to drying off at dryingoff 14d 7d prior to calving at calving and 7d post calving Milk yield at drying offday was recorded Drying off methods had no significant effect on milk fat protein lactose percentages or pH Colostrum protein in ID method was significantly lowerthan AD method P 0 02 Lactoferrin concentrations increased markedly asinvolution progressed and was higher in mammary secretions from ID method P 0 05 Somatic cell count was significantly lower in ID group compared to ADgroup P 0 04 No significant difference was observed in total bacteria between twomethods There was positive correlation between Somatic cell count and total bacteria r 0 352 P 0 01 The rear quarters had significantly higher total bacteria than thefront quarters P 0 01 Results indicated that ID method might be better for cowsgiven short dry period even with low milk production
استاد راهنما :
غلامرضا قرباني، حميد رضا رحماني
استاد مشاور :
مهدي محمد علي پور، مسعود عليخاني
استاد داور :
محمد خوروني، محمد فضيلتي
