Serum Protein of Female Holstein Calves Fed Milk through Step-Down and Conventional Methods

الموضوعات :

آ.سی.اس. سوآرس ¹ (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)
اف. مورایس کوستا ² (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)
ای.ر. دوآرت ³ (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)
ل.سی. گراسیو ⁴ (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)
م.جی. فریرا ⁵ (Escola de Veterinária, Universidade Federal de Minas Gerais, Cx. Postal 567, Av. Antônio Carlos 6627, Bairro Campus Pampulha, Belo Horizonte, State of Minas Gerais, Brasil)
جی.آ. باستوس ⁶ (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)
م.م. ملو ⁷ (Escola de Veterinária, Universidade Federal de Minas Gerais, Cx. Postal 567, Av. Antônio Carlos 6627, Bairro Campus Pampulha, Belo Horizonte, State of Minas Gerais, Brasil)
، ر.ر. ونکسلاو ⁸ (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)
ن.جی.اف. اُلیویرا ⁹ (Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Av. Universitária 1000, Bairro Universitário, Montes Claros, State of Minas Gerais, Brasil)

تاريخ الإرسال : 07 الجمعة , شعبان, 1440 تاريخ التأكيد : 12 السبت , شوال, 1440 تاريخ الإصدار : 06 الأحد , رجب, 1441

الکلمات المفتاحية: dairy cattle, ruminants, artificial feeding, electrophoretic serum protein profile,

ملخص المقالة :

The serum proteinograms of 10 female Holstein calves fed milk either through conventional (COV) or step-down (STP) milk feeding methods at different ages were evaluated. Calves fed using the COV method were fed colostrum during the first 24 hours that they stayed with their respective mothers and received transition milk for another 2 days and later, and then milk at four liters/day for 59 days. Calves fed using the STP method were fed colostrum and then milk as follows: Six liters of milk/day from days six to 25 after birth, four liters of milk/day from days 26 to 45, and two liters of milk/day from days 46 to 59 after birth. Blood sampling was performed at 7, 21, 28, 42, 49 and 56 days of age. For calves fed using either of the two milk feeding methods, the serum concentration of albumin increased, while the serum concentration of β-globulin decreased with increasing calf age. Calves fed using the COV method had higher serum total protein, globulin, β-globulin, and γ-globulin concentrations, while the concentrations of A/G, α1-globulin, and α2-globulin were higher for calves in the STP group. These results are important for establishing the serum protein profile of calves, which is significantly influenced by milk feeding methods and calf age.

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