Document Detail

Effects of added chelated trace minerals, organic selenium, yeast culture, direct-fed microbials and Yucca schidigera extract in horses. Part I: Blood nutrient concentration and digestibility.
MedLine Citation:
PMID:  23736057     Owner:  NLM     Status:  Publisher    
The objective of this study was to test the hypothesis that feed additives such as chelated minerals, organic Se, yeast culture, direct-fed microbials, and Yucca schidigera extract would improve nutrient digestibility when included in an equine diet. Horses (Quarter Horse geldings 4.5 to 16 yr of age; mean BW 522 kg ± 46 kg) were acclimated to 100% pelleted diets formulated with (ADD) and without (CTRL) commercially available sources of the aforementioned additives followed by a 14-d collection period of feces and urine. Chelated sources of Cu, Zn, Mn and Co were utilized versus sulfated forms, at a 100% replacement rate. No significant differences among apparent the digestibility of DM, ADF, or NDF (P= 0.6649, P = 0.8658, P = 0.7465, respectively) were detected between dietary treatments. Likewise, no differences in apparent digestibility of Cu (P = 0.7238), Zn (P = 0.2564), Mn (P = 0.8878), Co (P = 0.7097), or Se (P = 0.5877) were observed. No differences were observed in serum Cu, Mn, or Co concentrations between ADD and CTRL at acclimation or collection time points (P > 0.05). While no difference in serum Zn concentrations were observed between ADD and CTRL groups at acclimation (P > 0.05), they were greater at the collection time period for horses consuming CTRL (P < 0.0001). Whole blood Se concentration was greater in the CTRL group versus the ADD group both at acclimation (P = 0.0407) and collection (P = 0.0054) time periods. In reference to time, serum Cu concentrations increased (P = 0.0115) for animals consuming CTRL, but not ADD (P > 0.05). Serum Zn concentrations of horses consuming both ADD (P = 0.0211) and CTRL (P < 0.0001) increased over time from acclimation to collection time points. No time differences (P > 0.05) were observed in serum Mn concentrations. Serum Co concentrations increased over time in horses consuming both ADD (P = 0.0012) and CTRL (P = 0.0212). From acclimation to collection, whole blood Se concentration increased for horses consuming CTRL (P = 0.0095) but not for ADD (P > 0.05). The results of this study indicate no effect on nutrient digestibility due to the inclusion of chelated minerals, organic Se, yeast culture, direct-fed microbials, and Yucca schidigera extract for horses at maintenance.
M E Gordon; M S Edwards; C R Sweeney; M L Jerina
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-6-4
Journal Detail:
Title:  Journal of animal science     Volume:  -     ISSN:  1525-3163     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  2013 Jun 
Date Detail:
Created Date:  2013-6-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Purina Animal Nutrition, 100 Danforth Drive, Gray Summit, MO 63039.
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