Effect of Feeding Selenium-Fertilized Alfalfa Hay on Performance of Weaned Beef Calves Public Deposited

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  • Selenium (Se) is an essential micronutrient in cattle, and Se-deficiency can affect morbidity and mortality. Calves may have greater Se requirements during periods of stress, such as during the transitional period between weaning and movement to a feedlot. Previously, we showed that feeding Se-fertilized forage increases whole-blood (WB) Se concentrations in mature beef cows. Our current objective was to test whether feeding Se-fertilized forage increases WB-Se concentrations and performance in weaned beef calves. Recently weaned beef calves (n = 60) were blocked by body weight, randomly assigned to 4 groups, and fed an alfalfa hay based diet for 7 wk, which was harvested from fields fertilized with sodium-selenate at a rate of 0, 22.5, 45.0, or 89.9 g Se/ha. Blood samples were collected weekly and analyzed for WB-Se concentrations. Body weight and health status of calves were monitored during the 7-wk feeding trial. Increasing application rates of Se fertilizer resulted in increased alfalfa hay Se content for that cutting of alfalfa (0.07, 0.95, 1.55, 3.26 mg Se/kg dry matter for Se application rates of 0, 22.5, 45.0, or 89.9 g Se/ha, respectively). Feeding Se-fertilized alfalfa hay during the 7-wk preconditioning period increased WB-Se concentrations (P[subscript Linear] < 0.001) and body weights (P[subscript Linear] = 0.002) depending upon the Se-application rate. Based upon our results we suggest that soil-Se fertilization is a potential management tool to improve Se-status and performance in weaned calves in areas with low soil-Se concentrations.
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  • Hall, J. A., Bobe, G., Hunter, J. K., Vorachek, W. R., Stewart, W. C., Vanegas, J. A., . . . Pirelli, G. J. (2013). Effect of feeding selenium-fertilized alfalfa hay on performance of weaned beef calves. PloS One, 8(3), e58188. doi:10.1371/journal.pone.0058188
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  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2013-05-06T16:31:46Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) HallJeanAVeterinaryMedicineEffectFeedingSelenium.pdf: 263274 bytes, checksum: a24f840c6cf1bcde915a30b4f8f8855a (MD5)
  • description.provenance : Made available in DSpace on 2013-05-06T16:32:51Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) HallJeanAVeterinaryMedicineEffectFeedingSelenium.pdf: 263274 bytes, checksum: a24f840c6cf1bcde915a30b4f8f8855a (MD5) Previous issue date: 2013-03-11
  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2013-05-06T16:32:51Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) HallJeanAVeterinaryMedicineEffectFeedingSelenium.pdf: 263274 bytes, checksum: a24f840c6cf1bcde915a30b4f8f8855a (MD5)

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