02705naa a2200385 a 450000100080000000500110000800800410001902400520006010000230011224501850013526000090032052015110032965000240184065000170186465000120188165000120189365000150190565000210192065000110194165000180195265000120197065000130198265000160199565000240201165300260203570000200206170000260208170000220210770000270212970000220215670000230217870000250220170000230222677300700224921334482021-08-11       2020    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s11250-019-02173-w2DOI1 aRIBEIRO, L. dos S.  aChromium supplementation improves glucose metabolism and vaginal temperature regulation in Girolando cows under heat stress conditions in a climatic chamber.h[electronic resource]  c2020  aThis study aimed to evaluate chromium supplementation on productive, reproductive, and metabolic parameters at lactating Girolando cows subjected to heat stress conditions in a climatic chamber. Thirty-six lactating Girolando cows were subjected to two sequential trials. In trial 1 (thermoneutral environment), the effect of chromium supplementation was evaluated (0 vs. 0.50mg/kg of drymatter). In trial 2, the cows were fed the same diets, but they were divided into three environmental conditions: heat stress conditions in climatic chamber, fed ad libitum (HS); thermoneutral environment, fed ad libitum (TN); and thermoneutral environment, pair-fed (PF). In thermoneutral conditions, chromium supplementation did not affect productive or metabolic parameters, although supplemented cows had lower viability of oocytes (65.11 ± 0.08% vs. 76.86 ± 0.08%). During heat stress, chromium supplementation lowered plasma glucose levels (61.17 ± 1.90 vs. 67.11 ± 1.90 mg/dL), and increased the insulin:glucose ratio (0.39 ± 0.04 vs. 0.27 ± 0.04). Cows fed the control diet in the HS group had higher vaginal temperature values (39.40 ± 0.10 °C) than the cows in the TN group and PF group (38.89 ± 0.10 °C and 38.85 ± 0.11 °C, respectively). However, supplemented cows heat-stressed maintained the same vaginal temperature as cows in thermoneutral conditions. In conclusion, chromium supplementation improved glucose metabolism and prevented body temperature increases under heat stress conditions.  aAnimal reproduction  aDairy cattle  aGlucose  aInsulin  aMetabolism  aMilk composition  aBovino  aGado Leiteiro  aGlicose  aInsulina  aMetabolismo  aReprodução Animal  aComposição do leite1 aBRANDÃO, F. Z.1 aCARVALHEIRA, L. de R.1 aGOES, T. J. de F.1 aTORRES FILHO, R. de A.1 aQUINTAO, C. C. R.1 aPIRES, M. de F. A.1 aCAMARGO, L. S. de A.1 aCARVALHO, B. C. de  tTropical Animal Health and Productiongv. 52, p. 1661-1668, 2020.