PMID- 21438928 OWN - NLM STAT- MEDLINE DCOM- 20120710 LR - 20131121 IS - 1439-0396 (Electronic) IS - 0931-2439 (Linking) VI - 96 IP - 2 DP - 2012 Apr TI - Chromium supplementation and substitution of barley grain with corn: effects on metabolite and hormonal responses in periparturient dairy cows. PG - 220-7 LID - 10.1111/j.1439-0396.2011.01141.x [doi] AB - Thirty-two multiparous Holstein cows were used to investigate the effects of chromium-l-methionine (Cr-Met) supplementation and dietary grain source on metabolic indices throughout the periparturient period. Cows were fed a total mixed ration with the concentrate portion based on ground barley (barley based diet, BBD)--or ground corn (corn-based diet, CBD) from 21 days before anticipated calving through 28 days after calving. The Cr-Met was supplemented at dosages of 0 or 0.08 mg of Cr/kg of metabolic body weight throughout the experiment. Thus, treatments were in a 2 (Cr-Met) x 2 (grain sources) factorial arrangement. Plasma glucose, non-esterified fatty acids, triglyceride, very low-density lipoprotein, blood urea nitrogen (BUN), insulin, glucagon, cortisol and insulin-like growth factor-I (IGF-I) concentrations were not affected by chromium supplementation on calving day (d 0). However, there was a trend for decreased beta-hydroxybutyrate (BHBA) and increased cholesterol on d 0 in cows fed the Cr supplemented diet. On d 21 postpartum (wk 3 p.p.), plasma glucagon concentration tended to be greater in cows fed the Cr supplemented diet. However, other plasma metabolite and hormone measures were not affected by Cr supplementation in wk 3 p.p. There was no effect of grain source on d 0 plasma metabolic and endocrine measures. In wk 3 p.p., a significant difference was found only for plasma concentration of glucagon that was higher for cows fed the BBD compared with the CBD. There was an interaction of Cr-Met supplementation and grain source in wk 3 p.p. plasma concentration of BUN to decrease in CBD and increase in BBD, supplemented with Cr-Met. No Cr by grain interactions were observed for other plasma metabolic variables on d 0 and in wk 3 p.p. These results indicate that Cr-Met supplementation and substituting barley grain with corn throughout the transition period have only moderate effects on metabolic and endocrine parameters. CI - (c) 2011 Blackwell Verlag GmbH. FAU - Sadri, H AU - Sadri H AD - Department of Clinical Science, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran. sadri@tabrizu.ac.ir FAU - Rahmani, H R AU - Rahmani HR FAU - Khorvash, M AU - Khorvash M FAU - Ghorbani, G R AU - Ghorbani GR FAU - Bruckmaier, R M AU - Bruckmaier RM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110325 PL - Germany TA - J Anim Physiol Anim Nutr (Berl) JT - Journal of animal physiology and animal nutrition JID - 101126979 RN - 0 (Hormones) RN - 0R0008Q3JB (Chromium) SB - IM MH - Animal Feed/*analysis MH - Animal Nutritional Physiological Phenomena MH - Animals MH - Cattle/blood/*metabolism MH - Chromium/chemistry/*pharmacology MH - Dairying MH - Diet/veterinary MH - Dietary Supplements MH - Female MH - Hordeum/*chemistry MH - Hormones/*blood MH - Peripartum Period/blood/metabolism MH - Pregnancy MH - Zea mays/*chemistry EDAT- 2011/03/29 06:00 MHDA- 2012/07/11 06:00 CRDT- 2011/03/29 06:00 PHST- 2011/03/29 06:00 [entrez] PHST- 2011/03/29 06:00 [pubmed] PHST- 2012/07/11 06:00 [medline] AID - 10.1111/j.1439-0396.2011.01141.x [doi] PST - ppublish SO - J Anim Physiol Anim Nutr (Berl). 2012 Apr;96(2):220-7. doi: 10.1111/j.1439-0396.2011.01141.x. Epub 2011 Mar 25.