PMID- 34371467 OWN - NLM STAT- MEDLINE DCOM- 20210916 LR - 20220531 IS - 1751-732X (Electronic) IS - 1751-7311 (Linking) VI - 15 IP - 9 DP - 2021 Sep TI - Effect of chromium methionine supplementation on lactation performance, hepatic respiratory rate and anti-oxidative capacity in early-lactating dairy cows. PG - 100326 LID - S1751-7311(21)00169-5 [pii] LID - 10.1016/j.animal.2021.100326 [doi] AB - Chromium may regulate dairy cow metabolism; a chelated formation of chromium methionine (Cr-Met) is available to the feed industry. The objective of this study was to investigate the effect of Cr-Met supplementation on lactation performance, hepatic respiratory rate and anti-oxidative capacity in early-lactating Holstein dairy cows. 64 multiparous cows were assigned to 16 blocks based on parity and milk yield and then the four cows in a block were randomly allocated to four treatment groups with 0, 4, 8 or 16 g/d of Cr-Met per cow supplemented to a basal diet. Cows were moved from an open dry lot to a naturally ventilated tie stall barn 2 weeks before treatment to adapt to this facility, fed and milked at 0630, 1400, and 1930 h every day. The experiment lasted for 12 weeks. Milk yield and composition were recorded weekly. Dry matter intake was measured every 2 weeks for a total of six times throughout the trial. The plasma variables were measured in weeks 4, 8 and 12 of the experiment. Supplementation of Cr-Met did not affect DM intake of cows. As the supplementation of Cr-Met increased, yields of milk, fat, energy corrected milk (P < 0.01) and lactose (P = 0.01) increased in a linear manner. In terms of plasma variables, insulin concentration decreased in a linear manner with Cr-Met supplementation. As for variables relating to hepatic respiration rate, concentrations of pyruvate and NAD in the plasma were increased in quadratic manners, and lactic dehydrogenase activity was linearly increased as Cr-Met feeding levels increased. Moreover, plasma glutathione peroxidase and superoxide dismutase activity were increased in a linear manner. In conclusion, our study suggested that Cr-Met supplementation improved lactation performance of early-lactating dairy cows through enhancing antioxidant capacity and hepatic cellular respiration. CI - Copyright (c) 2021 The Author(s). Published by Elsevier B.V. All rights reserved. FAU - Wu, Z Z AU - Wu ZZ AD - Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China. FAU - Peng, W C AU - Peng WC AD - Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China. FAU - Liu, J X AU - Liu JX AD - Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China. FAU - Xu, G Z AU - Xu GZ AD - Zinpro Corporation, Eden Prairie, MN 55344, United States. FAU - Wang, D M AU - Wang DM AD - Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China. Electronic address: wdm@zju.edu.cn. LA - eng PT - Journal Article PT - Randomized Controlled Trial, Veterinary DEP - 20210807 PL - England TA - Animal JT - Animal : an international journal of animal bioscience JID - 101303270 RN - 0R0008Q3JB (Chromium) RN - AE28F7PNPL (Methionine) SB - IM MH - Animals MH - Cattle MH - Chromium MH - Diet/veterinary MH - Dietary Supplements MH - Female MH - *Lactation MH - *Methionine MH - Milk MH - Pregnancy MH - Respiratory Rate OTO - NOTNLM OT - Chromium chelate OT - Early lactation OT - Holstein cows OT - Metabolism OT - Production performance EDAT- 2021/08/10 06:00 MHDA- 2021/09/18 06:00 CRDT- 2021/08/09 20:28 PHST- 2020/09/06 00:00 [received] PHST- 2021/06/25 00:00 [revised] PHST- 2021/06/28 00:00 [accepted] PHST- 2021/08/10 06:00 [pubmed] PHST- 2021/09/18 06:00 [medline] PHST- 2021/08/09 20:28 [entrez] AID - S1751-7311(21)00169-5 [pii] AID - 10.1016/j.animal.2021.100326 [doi] PST - ppublish SO - Animal. 2021 Sep;15(9):100326. doi: 10.1016/j.animal.2021.100326. Epub 2021 Aug 7.