mineral supplementation update and recommendations
DESCRIPTION
Mineral Supplementation Update and Recommendations. Shane Gadberry Associate Professor Department of Animal Science - Extension. Cost of Mineral Supplementation. Cost of Mineral Supplementation. Macro Minerals. Comments on major minerals. Improved forages + good soil fertility - PowerPoint PPT PresentationTRANSCRIPT
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Mineral SupplementationUpdate and Recommendations
Shane GadberryAssociate Professor
Department of Animal Science - Extension
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Cost of Mineral Supplementation
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Cost of Mineral Supplementation
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Macro Minerals
Mineral NRC Bermuda Hay Fescue Hay
Ca, % 0.28 0.53 0.51
P, % 0.19 0.30 0.32
Na, % 0.10 0.04 0.03
K , % 0.70 1.98 2.01
Mg, % 0.20 0.22 0.25
S, % 0.15 0.30 0.20
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Comments on major minerals
• Improved forages + good soil fertility– Good job with major mineral requirements– Exception is Sodium– Hypomagnesia {too good of job in Spring}
• Does sodium deficiency contribute to hypomagnesia? – March 27, 2012 [Beef Magazine]– Dr. Swerczek DVM PhD UK Dept of Vet Science
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Trace Minerals
Mineral NRC Bermuda Hay Fescue Hay
Mn, ppm(poor absorption)
40 310 (66% CV) 145 (69% CV)
Cu, ppm(Fe, S, Mo)
10 11 (36% CV) 11 (39% CV)
Zn, ppm(not as well defined)
30 35 (41% CV) 35 (41% CV)
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Effect of replacing inorganic with organic forms of Cu, Zn, Mn, and Se in Dairy Cows (Biol Trace
Elem Res 2012)
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Form of trace mineral supplementation to 1st calf heifers (JAS 1999)
0.2 oz
1.3 oz0.7 oz
3.7 oz0.7 oz6.9 oz10.7 oz
Control – hay w/sbm+corn suppl. and no suppl TMRoughly equivalent to a 4 oz mineral containing 1100 ppm Cu, 200 ppm Co1750 ppm Mn and 3150 ppm Zn
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Results
• Year 1 – organic mineral = later breeding and subsequent later calving
• Year 2 – no difference in breeding or subsequent calving date
• Combined years –mineral supplementation increased number of open cows
• No difference in cow wt, condition score or calf growth
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Trace Mineral Suppl. - InjectionStudy Descriptor Response
Kegley et al (AR Anim Sci, 2011)
Injection 28d before weaning – calves given access to complete mineral
No effect on growth, hair coat or carcass measures
Richeson et al (AR Anim Sci, 2009)
Stocker injection on arrival 21% ADG over 55 d30% Morbidity
Gadberry and Simon (unpubished)
Cows - prebreeding and precalvingCalves – 90 d processing and pre-weaningNo other mineral suppl
No effect on BW, BCS, pregnancy rate, calf growth response, BVDV1 titers
Andrews and Gadberry(unpublished)
Stocker calves – given upon arrival calves weighed Feb and End of March
No difference in gain
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Comments on Trace Minerals
• No conclusive evidence for use of organic forms in mature cow herd
• No conclusive evidence for use of injectable TM in mature cow herd
• Receiving cattle may be more likely to respond to injectable TM supplementation than cattle retained on farm