Metabolism of Bull Semen. I. Inorganic and Total Phosphorus Relationships

Abstract
Inorganic and total P determinations on 506 semen samples collected over a 7-months period from 36 bulls of high fertility showed a marked relationship between sperm concentration and total P (r = 0.88). Inorganic P content of semen before and after incubation for 1 hour at 37[degree]C was most closely correlated with sperm concentration (r = 0.23) and showed unimportant relationships with initial motility, fructose and fructose utilization. Inorganic P increased 1.4 mg% or 8.2% (P < 0.01) during incubation for 1 hour at 37[degree]C. This change was not related to bulls, breeds, months or any of the semen quality measures. There was no relationship between inorganic and total P and fertility as measured by nonreturn rate.

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