Postpartum progesterone profiles in cows with different milk yields
نویسندگان
چکیده
منابع مشابه
Enzyme-immunoassay for determination of progesterone in milk from cows.
An enzyme-immunoassay using horseradish peroxidase as label is described. The assay has a sensitivity of 0.1-20 pmol, i.e. 0.03-0.63 ng and intra- and inter-assay coefficients of variation of less than 10% when used for the determination of progesterone in samples of milk from cows. Comparison with a radio-immunoassay based on tritiated tracer showed excellent correlation (r = 0.98) for milk sa...
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Postpartum anestrous is one of the most important problems in the dairy industry in the world and especially in Iran. The objective of present study was to compare the efficacy of two hormonal programs for recycling of postpartum anestrous cows. For this reason, 230 Holstein cows from 4 similar dairy herds (with totally 2560 cow and unique management and feeding system) located on the suburb of...
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The objective of the present study was to determine the effect of substitution of corn grain with dried citrus pulp (DCP) on milk composition, fatty acids profiles and blood metabolites in Holstein dairy cows. These parameters were measured in a replicated 4 × 4 latin square design experiment using eight Holstein cows. Each experimental period lasted 4 weeks. The four treatments were: control (...
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ژورنال
عنوان ژورنال: Annals of Warsaw University of Life Sciences - SGGW - Animal Science
سال: 2018
ISSN: 1898-8830
DOI: 10.22630/aas.2018.57.3.23