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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1995;8(3): 263-265.
DOI: https://doi.org/10.5713/ajas.1995.263    Published online June 1, 1995.
Blood plasma mineras and fertility of dairy cows in central Thailand
P. Vijchulata
Blood plasma minerals and their effects towards the fertility in 136 cows randomly selected from 26 dairy farms in central Thailand were studied. An average of 8.60 mg% Ca, 5.97 mg% P, 2.45 mg% Mg, 85.9 關g% Cu, and 160.9 關g% Zn in plasma was observed. Compared to the critical deficient values, 24.3, 10.3, 11.8, 28.7 and 0.0% of the surveyed cows obtained the respective elements in plasma below the standard levels. No significant difference(p>.05) in plasma concentrations of Ca, P, Mg and Zn for the low fertile (conception rate>3) and fertile (conception rate<3) cows was found. However, plasma Cu of the low fertile cows (averaged 77.2 關g%) was lower(p<.01) than that of the fertile ones(averaged 91.12 關g%). Additionally, it is observed that 47.1% of the cows with the low fertility problem obtained plasma Cu below the 65.0 關g% critical deficient value.
Keywords: Lasma Minerals; Fertility; Cows

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