Effect of Milk Urea Nitrogen of Dairy Cows in Relation to Breed
محورهای موضوعی : Camel
م.ر. اسلام
1
(Deputy Manager, ACI Godraj Ltd, Bangladesh)
م.ن. آدین
2
(Department ofLivestock Production and Management,Sylhet Agricultural University, Sylhet, Bangladesh)
م.ر. آکاندا
3
(Department ofPharmacology and Toxicology, Sylhet Agricultural University, Sylhet, Bangladesh)
م.م.اچ. خان
4
(Department ofChemistry and Biochemistry, Sylhet Agricultural University, Sylhet, Bangladesh)
م.آ. بیست
5
(Department ofLivestock Production and Management,Sylhet Agricultural University, Sylhet, Bangladesh)
اس.آ. بلال
6
(Department ofPoultry Science, Sylhet Agricultural University, Sylhet, Bangladesh)
کلید واژه: dairy cows, Milk, Urea nitrogen,
چکیده مقاله :
Milk urea nitrogen (MUN) of dairy cows was determined in relation to breed. A total of forty (40) Pabna and red Chittagong dairy cattle each of twenty (20) were selected to know the milk composition, nutritional status and milk urea nitrogen. Live weight of Pabna Cattle (187±14 kg) was higher than that of red Chittagong cattle (174±4 kg). In Pabna cattle milk yield (4.94 kg), minerals (0.15%) and lactose (5.38%) is more than red Chittagong cattle milk yield (3.62 kg), minerals (0.12%) and lactose (5.37%) but fat (5.04%), protein (3.7%) and solid not fat (SNF) content (9.92%) was more in red Chittagong cattle than Pabna cattle fat (4.03%), protein (3.64%) and SNF (9.87%). The metabolic energy 74.93 MJ/day, dry matter 9.47 kg, crude protein 0.84 kg , ash 1.24 kg, crude fiber 2.18 kg and true digestible nutrient 5.43 kg was required for Pabna cattle and in red Chittagong cattle metabolic energy 72.60 MJ/day, dry matter 9.14 kg, crude protein 0.660kg , ash 1.16 kg, crude fiber 1.93 kg and true digestible nutrient 5.19 kg was required. Milk urea nitrogen (MUN) concentration was higher under in Pabna cattle (38.15 mg/dL) than red Chittagong cattle (RCC) (29.30 mg/dL). Milk urea nitrogen (MUN) differ Pabna cows and red Chittagong cows.
ازت اورهای شیر گاوهای شیری و ارتباط آن با نژاد تعیین شد. در مجموع از 40 رأس گاو شیری (20 رأس گاو شیری پاپنا و 20 رأس گاو شیری چیتاگونگ قرمز) انتخاب شده برای بررسی ترکیب شیر، وضعیت تغذیهای و ازت اورهای شیر استفاده شد. وزن بدن گاو پاپنا (14±187 کیلوگرم) در مقایسه با گاو قرمز چیتاگونگ (4±174 کیلوگرم) بالاتر بود. تولید شیر (94/4 کیلوگرم)، مواد معدنی (15/0 درصد) و لاکتوز (83/5 درصد) شیر گاو پاپنا در مقایسه با تولید شیر (62/3 کیلوگرم)، مواد معدنی (12/0 درصد) و لاکتوز (37/5 درصد) گاو قرمز چیتاگونگ بالاتر ولی محتوای چربی (04/5 درصد)، پروتئین (7/3 درصد) و مواد جامد بدون چربی (92/9 درصد) در گاو چیتاگونگ قرمز بیشتر از محتوای چربی (03/4 درصد)، پروتئین (64/3 درصد) و مواد جامد بدون چربی (87/9 درصد) گاو پاپنا بود. گاو پاپنا روزانه نیازمند 93/74 مگاژول انرژی متابولیسمی، 47/9 کیلوگرم ماده خشک، 84/0 کیلوگرم پروتئین خام، 24/1 کیلوگرم خاکستر، 18/2 کیلوگرم الیاف خام و 43/5 کیلوگرم مواد مغذی قابل هضم حقیقی بود در حالیکه این نیازمندیها روزانه برای گاو چیتاگونگ قرمز به ترتیب 60/72 مگاژول، 14/9 کیلوگرم، 66/0 کیلوگرم، 16/1 کیلوگرم، 93/1 کیلوگرم و 19/5 کیلوگرم بود. غلظت اورهای شیر در گاو پاپنا (15/38 میلیگرم در دسیلیتر) در مقایسه با گاو چیتاگونگ قرمز (30/29 میلیگرم در دسیلیتر) بالاتر بود. ازت اورهای شیر در گاو پاپنا و چیتاگونگ قرمز متفاوت بود.
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