Acta Vet. Brno 2019, 88: 277-285
https://doi.org/10.2754/avb201988030277
Evaluation of the milk urea content in relation to milk production and composition in dairy cows
References
1. H, Rekik B, Haddad-Boubaker A 2008: Non-nutritional factors associated with milk urea concentrations under Mediterranean conditions. World J Agric Sci 4: 183-188
2. M, Neja W, Oler A, Krężel S 2005: Poziom mocznika w mleku krow w zależności od wybranych czynnikow [Urea level in cow's milk depending on selected factors]. Rocz AR Pozn CCCLXXVI Zootech 56: 57-61
3. C, Folchini JA, Noro M, Quadros DL, Machado KM, González FHD 2018: Milk composition of Holstein cows: a retrospective study. Cienc Rural 48: 1-8
<https://doi.org/10.1590/0103-8478cr20180123>
4. K, Kučević D, Plavšić M, Bogdanović V 2017: Impact of non-nutritional factors on milk urea concentration and its relationship with production and fertility traits in Vojvodina dairy herds. Mljekarstvo 67: 267-276
<https://doi.org/10.15567/mljekarstvo.2017.0404>
5. AF, Múnera-Bedoya OD, Herrera AC, Agudelo-Trujillo JH, Cerón-Muñoz MF 2014: Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows. R Bras Zootec 43: 479-484
<https://doi.org/10.1590/S1516-35982014000900004>
6. IBM Corporation 2016: IBM SPSS Statistics for Windows, Version 24.0. Armonk, NY: IBM Corporation
7. EM, Muchenje V, Masika PJ 2017: Yield and milk composition at different stages of lactation from a small herd of Nguni, Boer, and non-descript goats raised in an extensive production system. Sustainability 9: 1000
<https://doi.org/10.3390/su9061000>
8. F, Řehák D, Volek J, Štípková M, Němcová E, Fiedlerová M, Rajmon R, Švestková D 2006: Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk. Czech J Anim Sci 51: 510-517
<https://doi.org/10.17221/3971-CJAS>
9. S, Jawjaroensri W, VanLeeuwen J, Stryhn H, Arunvipas P 2018: Exploring factors associated with bulk tank milk urea nitrogen in Central Thailand. Vet World 11: 642-648
<https://doi.org/10.14202/vetworld.2018.642-648>
10. National Research Council (NRC) 2001: Nutrient requirements of dairy cattle, 7th Revised Edition. The National Academies Press, Washington, D.C., 381 p.
11. J, Shingfield KJ, Huhtanen P 2004: Evaluation of milk urea nitrogen as a diagnostic of protein feeding. J Dairy Sci 87: 386-398
<https://doi.org/10.3168/jds.S0022-0302(04)73178-1>
12. JM, Rotz CA, Wattiaux, MA 2014: Potential use of milk urea nitrogen to abate atmospheric nitrogen emissions from Wisconsin dairy farms. J Environ Qual 43: 1169-1175
<https://doi.org/10.2134/jeq2013.09.0375>
13. J, Antkowiak I, Skrzypek R 2010: Relationships between somatic cells counts and urea level in the milk of Polish Holstein-Friesian cows of black-and-white and red-white varieties. Acta Sci Pol Zootechnica 9: 39-50
14. ES, Eltaher HA, El Zubeir IEM 2016: Effect of stage of lactation and order of parity on milk composition and daily milk yield among local and crossbred cows in South Darfur State, Sudan. Sch J Agric Vet Sci 17: 86-99
15. N, Panousis N, Arsenos G, Valergakis GE 2017: Investigation of milk urea nitrogen concentration and factors affecting its variation in Greek Holstein herds. J Hell Vet Med Soc 68: 423-432
<https://doi.org/10.12681/jhvms.15530>
16. VN, Rangel AHN, Galvão Júnior JGB, Urbano SA, Borba LH, Novaes LP, Lima Júnior DM 2016: Influence of somatic cell count in the composition of Girolando cow's milk in tropical zone. Trop Subtrop Agroecosyst 19: 101-107
17. AM, Martins AM, Santos VA, Ginja MM, Colaço JA 2009: Lactation curves for milk, fat and protein in dairy cows: A full approach. Livest Sci 122: 308-313
<https://doi.org/10.1016/j.livsci.2008.09.017>
18. TL, Gxasheka M, Tlabela CHP 2015: Assessing the effect of nutrition on milk composition of dairy cows: A review. Int J Curr Sci 17: 56-63
19. M, Park JH, Ki KS, Lim DH, Kim SB, Park SM, Jeong HY, Park BY, Kim TI 2017: The effect of lactation number, stage, length, and milking frequency on milk yield in Korean Holstein dairy cows using automatic milking system. Asian-Australas J Anim Sci 30: 1093-1098
<https://doi.org/10.5713/ajas.16.0882>
20. MA, Nordheim EV, Crump P 2005: Statistical evaluation of factors and interactions affecting dairy herd improvement milk urea nitrogen in commercial Midwest dairy herds. J Dairy Sci 88: 3020-3035
<https://doi.org/10.3168/jds.S0022-0302(05)72982-9>
21. HL, Hristov AN 2017: Short communication: Analytical method and amount of preservative added to milk samples may alter milk urea nitrogen measurements. J Dairy Sci 100: 1502-1506
<https://doi.org/10.3168/jds.2016-11277>
22. H, Wang M, Jiang H, Cui Y, Xia H, Ni W, Li M, Karrow NA, Yang Z, Mao Y 2018: Factors affecting the milk urea nitrogen concentration in Chinese Holstein cows. Anim Biol 68: 193-211
<https://doi.org/10.1163/15707563-17000099>

