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Title:   Author  item
                                            LAWLER, T - NDSU-FARGOitem
                                            Taylor, Joshua

                                                         - *Bret*item
                                            Grings, Elaineitem
                                            Finley, Johnitem
                                            CATON, J - NDSU-FARGO
  Submitted to: Research Update for Fort Keogh Livestock and Range Research Laboratory
                                    Publication Type: Popular Publication
                                    Publication Acceptance Date: 10/1/2002
                                    Publication  Date: 1/15/2003
                                    Citation: Lawler, T.J., Taylor, J.B., Grings, E.E., Finley, J.W., Caton, J. 2003. Selenium concentration and distribution in range forages from four locations in the northern great plains. Research Update for Fort Keogh Livestock and Range Research Laboratory p. 82. 2003.Interpretive Summary: Previous research has shown anticarcinogenic properties associated with supranutritonal levels of selenium supplementation for humans. It has been suggested that the antioxidative properties of selenium might be one mechanism for cancer reductions. Beef, on the average, is the single greatest contributor to human dietary selenium in North America. Geographical region and soil selenium concentrations have been reported to be useful in predicting selenium concentrations of beef. The objectives of this study were to assess selenium concentration in diet versus available forage and to evaluate the distribution of selenium in forage fractions across the grazing season. Selenium concentrations were not different between masticate and total grass samples within each location. Selenium concentrations were also not different between grass stem and grass leaf.  Seasonal changes in forage selenium were inconsistent across seasons at the different locations. Additional forage samples have been collected and should provide further insight into seasonal changes in forage selenium concentrations.
                                Technical Abstract: Previous research has shown anticarcinogenic properties associated with supranutritonal levels of selenium supplementation for humans. It has been suggested that the antioxidative properties of selenium might be one mechanism for cancer reductions. Beef, on the average, is the single greatest contributor to human dietary selenium in North America. Geographical region and soil selenium concentrations have been reported to be useful in predicting selenium concentrations of beef. The objectives of this study were to assess selenium concentration in diet versus available forage and to evaluate the distribution of selenium in forage fractions across the grazing season. Selenium concentrations were not different between masticate and total grass samples within each location. Selenium concentrations were also not different between grass stem and grass leaf.  Seasonal changes in forage selenium were inconsistent across seasons at the different locations. Additional forage samples have been collected and should provide further insight into seasonal changes in forage selenium concentrations.


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