Dr, Department of Husbandry and Animal Wealth Development, University of Sadat City, Menofia, Egypt
Research Article
Impacts of Climatic Factors on Milk Yield Performance and Mastitis Incidence in Holstein Cattle Reared under Subtropical Condition
Author(s): Ahmed Dawod*
This study aimed to investigate the effect of climatic factors, including temperature-humidity index (THI) and rainfall level (RFL) regarding the
parity on the incidence of mastitis, milk yield, and composition in Holstein cattle in Egypt. A total of 2496 lactating cows were used from
different 4 dairy farms located in Egypt. One hundred dairy cows were selected from each dairy herd for detection of the effect of different
climatic factors and parity on milk composition and somatic cell count (SCC).The data grouped according to parity into 1, 2, and >2 parity
groups. Also, the animals grouped according to THI into low (<70), medium (70-80), and high (>80) THI level and regrouped according to RFL
into low (<2 mm), medium (2-5 mm), and high (>5 mm) rainfall per month. Obtained results revealed an increase in daily milk yield, milk protein
%, fat %,.. Read More»
DOI:
10.37421/2157-7579.2022.13.135
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