Effect of Milk Urea Nitrogen of Dairy Cows in Relation to Breed
محورهای موضوعی : Camelم.ر. اسلام 1 , م.ن. آدین 2 , م.ر. آکاندا 3 , م.م.اچ. خان 4 , م.آ. بیست 5 , اس.آ. بلال 6
1 - Deputy Manager, ACI Godraj Ltd, Bangladesh
2 - Department ofLivestock Production and Management,Sylhet Agricultural University, Sylhet, Bangladesh
3 - Department ofPharmacology and Toxicology, Sylhet Agricultural University, Sylhet, Bangladesh
4 - Department ofChemistry and Biochemistry, Sylhet Agricultural University, Sylhet, Bangladesh
5 - Department ofLivestock Production and Management,Sylhet Agricultural University, Sylhet, Bangladesh
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.
AOAC. (1990). Official Methods of Analysis. Vol. I. 15th Ed. Association of Official Analytical Chemists, Arlington, VA, USA.
ARC. (1994). Agricultural Research Council. The Nutrients Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux. Slough. England.
Baker L.D., Ferguson J.D. and Chalupa W. (1995). Responses in urea and true protein of milk to different protein feeding schemes for dairy cows. J. Dairy Sci. 78, 11-18.
Baset M.A. (2012). Milk urea nitrogen concentration as a tool to monitor dietary protein status of dairy cows. Ph D. Thesis. Bangladesh Agricultural Univ., Mymensingh.
Broderick G.A. and Clayton M.K. (1997). A statistical evaluation of animal and nutritional factors influencing concentrations of milk urea nitrogen. J. Dairy Sci. 80, 2964-2970.
Carlsson J. and Pehrson B. (1994). The influence of the dietary balance between energy and protein on milk urea concentration. Experimental trials assessed by two different protein evaluation systems. Acta Vet. Scandinavica. 35,193-205.
Dhali A., Mehla R.K. and Sirohi S.K. (2005). Effect of urea supplemented and urea treated straw based diet on milk urea concentration in crossbred Karan- Fries cows. Italian J. Anim. Sci. 4, 25-34.
Eicher R., Bouchard E. and Bigras-Poulin M. (1999). Factors affecting milk urea nitrogen and protein concentrations in Quebec dairy cows. Prev. Vet. Med. 39(1), 53-63.
Garcia A.D., Linn J.G., Stewart S.C. and Olson J.D. (1997). Evaluation of milk urea nitrogen (MUN) as a dietary monitor for dairy cows.J. Dairy Sci. 80(1), 161-168.
Grande P.A., Santos G.T.D., Rebeiro H., Damasceno J.C., Alcalde C.R., Barbosa O.R., Horst J.A. and Santos F.S.D. (2009). Monitoring the nutritional and reproductive state of dairy cows through the presence of urea in milk. Br. Arch. Biol. Technol. 52, 249-258.
Hwang S.Y., Mei-Ju L. and Peter W.C. (2000). Monitoring nutritional status of dairy cows in Taiwan using milk protein and milk urea nitrogen. Asian-australas J. Anim. Sci. 13, 1667-1673.
Jonker J.S., Kohn R.A. and Erdman R.A. (1998). Using milk urea nitrogen to predict nitrogen excretion and utilization efficiency in lactating dairy cows. J. Dairy Sci. 81, 2681-2692.
Kalscheur K.F., Baldwin R.L., Glenn V.I.B.P. and Kohn R.A. (2006). Milk production of dairy cows fed differing concentration of rumen-degraded protein. J. Dairy Sci. 89, 249-259.
Law R.A., Young F.J., Patterson D.C., Kilpatrick D.J., Wylie A.R.G. and Mayne C.S. (2009). Effect of dietary protein content on animal production and blood metabolites of dairy cows during lactation. J. Dairy Sci. 92, 1001-1012.
Moore D.A. and Verga G. (1986). BUN and MUN: urea nitrogen testing in dairy cattle. Comp. Cont. Vet. 18, 712-720.
NRC. (1989). Nutrient requirements of dairy cattle. 6th Ed. National Academy Press, Washington, DC. USA.
Oltner R. and Wiktorsson H. (1983). Urea concentrations in milk and blood as influenced by feeding various amounts of protein and energy to dairy cows. Livest. Prod. Sci. 10, 457-467.
Oltner R., Emanuelson M. and Wiktorsson H. (1985). Urea concentration in milk in relation to milk yield, live weight, lactation number and amount and composition of feed given to dairy cows. Livest. Prod. Sci. 12, 47-57.
Peterson A.B., French K.R., Russek-Cohen E. and Khon R.A. (2004). Comparison of analytical methods and the influence of milk components of milk urea nitrogen recovery. J. Dairy Sci. 87, 1747-1750.
Reynal S.M. and Broderick G.A. (2005). Effects of dietary level of rumen-degraded protein on production nitrogen metabolism in lactating dairy cows. J. Dairy Sci. 88, 4045-4064.
Roseler D.K., Ferguson J.D., Sniffen C.J. and Herrema J. (1993). Dietary protein degradability effects on plasma and milk urea nitrogen and milk nonprotein nitrogen in Holstein cows.J. Dairy Sci. 76, 525-534.
Shewy A.E., Kholif S. and Morsy T. (2010). Determination of milk urea nitrogen for the Egyptian cattle fed the summer winter diets. J. Am. Sci. 6(12), 382-384.
Wenninger A. and Distl O. (1994). Urea and content in milk as indicators for nutritionally caused fertility disorders of dairy cows. Dtsch. Tierarztl. Wochenschr. 101(4), 152-157.
