The Methylene-Blue Reduction Test and its Relation to Other Measures of Quality in Bull Semen

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Abstract
The relationship between this test and other measures of semen quality were shown by correlation analysis. The test was not related to the proportion of morphologically abnormal spermatozoa, nor with ascorbic acid content or initial glucose level of fresh semen, nor with the glucose loss in diluted semen after 10 days'' storage at 5[degree]C. High relationships were shown between the test and volume of the ejaculate, spermatozoa count, initial motility, initial pH, and initial lactic acid level of fresh semen. Equally significant relations were shown between the test and lactic acid gain and livability both during incubation at 46.5[degree]C and 10 days'' storage at 5[degree]C.