PMID- 22552822 OWN - NLM STAT- MEDLINE DCOM- 20130118 LR - 20181201 IS - 1559-0720 (Electronic) IS - 0163-4984 (Linking) VI - 149 IP - 1 DP - 2012 Oct TI - Effect of chromium supplementation on productive and reproductive performances and some metabolic parameters in late gestation and early lactation of dairy cows. PG - 42-9 LID - 10.1007/s12011-012-9390-0 [doi] AB - The objective of this study was to determine the effect of supplemental chromium as chromium-L-methionine (Cr-Met) on productive and reproductive performances and some metabolic parameters in late gestation and early lactation of dairy cows. Sixty multiparous Holstein dairy cows according to prior lactation, parity, body mass (682+/-33 kg), and expected calving date were divided equally (30 cows/treatment) and were randomly allocated to one of the two groups. One group received basal diet without Cr (control group) and another group received Cr-Met supplement added at manufacturer's recommended level (8 mg of "Cr"/head per day) from 21 days before expected calving date until 21 days of lactation. Supplemental Cr tended to increase milk yield (P=0.08) while percentage of lactose and lactose yield increased (P<0.01). Chromium supplementation decreased serum nonesterified fatty acids concentration at 7 days prepartum and 21 days postpartum. Serum insulin concentration for cows receiving Cr was higher than the control group (P=0.05). Serum cortisol concentration decreased (P<0.05) in prepartum period in supplemented group. Chromium did not affect concentrations of metabolic parameters at calving. However, serum glucose concentration increased at 21 days postpartum in the supplemented group (P<0.05). Chromium supplementation increased neutrophil and neutrophil to lymphocyte ratio in prepartum period (P<0.05). Based on serum concentrations of progesterone, days to first ovulation tended (P=0.07) to occur earlier in the supplemented group. Furthermore, days to first service and days to first estrus of the supplemented group occurred earlier than the control group (P<0.05) but days open, services per conception and conception rates at first insemination did not differ between two groups (P>0.05). Percentage of cyclic cows at 36 days postpartum and estrous behavior before AI was higher in the supplemented group. FAU - Kafilzadeh, F AU - Kafilzadeh F AD - Department of Animal Science, Faculty of Agriculture, Razi University, Kermanshah 6719685416, Iran. kafilzadeh@razi.ac.ir FAU - shabankareh, H Karami AU - shabankareh HK FAU - Targhibi, M R AU - Targhibi MR LA - eng PT - Journal Article PT - Randomized Controlled Trial DEP - 20120414 PL - United States TA - Biol Trace Elem Res JT - Biological trace element research JID - 7911509 RN - 0 (Blood Glucose) RN - 0 (Fatty Acids, Nonesterified) RN - 0 (Insulin) RN - 0R0008Q3JB (Chromium) RN - 4G7DS2Q64Y (Progesterone) RN - AE28F7PNPL (Methionine) RN - WI4X0X7BPJ (Hydrocortisone) SB - IM EIN - Biol Trace Elem Res. 2012 Oct;149(1);133 MH - Animal Feed MH - Animal Nutritional Physiological Phenomena MH - Animals MH - Blood Glucose MH - Body Weight/drug effects MH - Cattle/*metabolism MH - Chromium/administration & dosage/*pharmacology MH - *Dietary Supplements MH - Estrus/drug effects/metabolism MH - Fatty Acids, Nonesterified/blood MH - Female MH - Hydrocortisone/blood MH - Insulin/blood MH - Lactation/drug effects/*metabolism MH - Lymphocytes/metabolism MH - Methionine/administration & dosage/pharmacology MH - Milk/metabolism MH - Neutrophils/metabolism MH - Postpartum Period/drug effects MH - Pregnancy/*drug effects/metabolism MH - Progesterone/blood MH - Reproduction/*drug effects EDAT- 2012/05/04 06:00 MHDA- 2013/01/19 06:00 CRDT- 2012/05/04 06:00 PHST- 2012/02/14 00:00 [received] PHST- 2012/03/07 00:00 [accepted] PHST- 2012/05/04 06:00 [entrez] PHST- 2012/05/04 06:00 [pubmed] PHST- 2013/01/19 06:00 [medline] AID - 10.1007/s12011-012-9390-0 [doi] PST - ppublish SO - Biol Trace Elem Res. 2012 Oct;149(1):42-9. doi: 10.1007/s12011-012-9390-0. Epub 2012 Apr 14.