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Dr. Ahmed Abdalla Ahmed Sabek :: Publications:

Title:
Effects of parity and days in milk on milk composition in correlation with β-hydroxybutyrate in tropic dairy cows
Authors: Ahmed Sabek, Chunfang Li, Chao Du, Liangkang Nan, Junqing Ni, Eman Elgazzar, Yabing Ma, Abdelfattah Z. M. Salem & Shujun Zhang
Year: 2021
Keywords: Holstein cows . β-Hydroxybutyrate . Days in milk . Milk production . Parity . Somatic cells
Journal: Tropical Animal Health and Production
Volume: 53
Issue: Not Available
Pages: Not Available
Publisher: Springer
Local/International: International
Paper Link:
Full paper Ahmed Abdalla Ahmed Sabek_5- Sabek2021_Article_EffectsOfParityAndDaysInMilkOn.pdf
Supplementary materials Not Available
Abstract:

The current study was conducted to evaluate the effect of parity and days in milk on milk yield and milk production traits and their correlation with β-hydroxybutyrate (BHB) concentrations in milk of Chinese tropic Holstein dairy cows which are adapted to a humid subtropical climate in central China. About 3055 milking records of Holstein cows were obtained from three farms in the hot region in the center of China. The records were classified according to parity to 4 categories: first parity, second parity, third parity, and greater than third parity. According to days in milk, there were 4 groups, first group from (1–100 days), second group from (101–200 days), third group from (201–305 days), and fourth group (>305 days). Milk samples collected between April and November 2019 from the three farms were routinely checked for milk components including BHB using mid-infrared spectroscopy a MilkoScan FT+ (Foss, Hillerød, Denmark). Data were analyzed by multivariate analysis of variance (generalized linear model, GLM). Pearson’s correlation coefficients were used to measure the correlation between SCC and BHB with milk yield and milk production traits. Results showed the significant effect of parity and days in milk on milk yield and milk production traits. There was a negative effect of parity and days in milk on milk quality, with increasing parity and days in milk being associated with higher somatic cell count (SCC) (P

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