The effect of Seasonal heat stress on oxidants–antioxidants biomarkers, trace minerals and acute-phase response of peri-parturient Holstein Friesian cows supplemented with adequate minerals and vitamins with and without retained fetal membranes

Bulletin of the National Research Centre

Table 3 Mean ± SD of zinc, copper, iron, calcium and phosphorus concentrations in dairy cows during winter/heat stress with and without retained fetal membranes

Months	Cold		Hot		P value
Parameters	Normal	Retained	Normal	Retained	P value
Zinc /ug/dl	222 ± 2.92^b	218 ± 2.42^ab	214 ± 2.18^ab	213 ± 2.20^a	0.001
Copper /ugdl	210 ± 5.75	223 ± 8.56	227 ± 6.76	229 ± 4.72	0.08
Iron /ugdl	209 ± 10.12^a	201 ± 16.79^a	246 ± 13.29^b	249 ± 13.29^b	0.007
Phosphorus	4.24 ± .02^bc	4.29 ± .07^b	4.15 ± .02^a	4.22 ± .04^ab	0.003
calcium	10.26 ± .08^ab	10.27 ± .24^ab	10.33 ± .08^b	10.02 ± .17^a	0.015
Corrected calcium	9.07 ± 0.79^b	9.09 ± 0.82^b	9.47 ± 1.07^c	8.73 ± 1.09^a	0.0001
Calcium/Phosphorus	2.57 ± .02^ab	2.54 ± .07^a	2.64 ± .02^b	2.51 ± .04^a	0.008