The aim of the present study was to evaluate the association of postpartum calcemic status and colostrum concentration of Ca, P, Mg, K, Na, Fe, Zn and Cu on 131 multiparous Jersey cows. Colostrum samples were harvested at 9 h 36 min (±3 h 36 min) after calving and analyzed for mineral concentration by inductively coupled plasma–optical emission spectrometry. Final colostrum weigh was recorded at milking. Blood samples for serum Ca analyses were collected from the coccygeal vessels within 6 h after calving. Based on serum Ca concentration, cows were classified as hypocalcemic (SHC; Ca ≤8.5 mg/dL; n = 103) and normocalcemic (NC; Ca >8.5 mg/dL; n = 28). Descriptive statistics, including first (Q₁), second (Q₂) and third (Q₃) quartiles of colostrum mineral concentrations based on calcemic status at calving are shown in the Table 1. Associations among calcemic status were analyzed using mixed models with MIXED procedures of SAS. There was a tendency (P = 0.07) for higher colostrum weigh on SCH cows (4.2 kg) than NC cows (3.2 kg). Cows with SHC had higher colostrum P concentration (1400.13 vs. 1140.43 mg/kg; P < 0.01) Mg (338.88 vs. 299.52. mg/kg; P < 0.05), K (1494.87 vs.1302.73 mg/kg; P < 0.01) and Zn (18.54 vs.15.25 mg/kg; P < 0.05) than NC cows, but lower Na (822.19 vs. 1003.73 mg/kg; P < 0.05). Cows with SHC had higher colostrum excretion P (P < 0.05) and Mg (P < 0.05) than NC cows. Our results show that calcemic status tends to affect colostrum yield and is associated with mineral concentration at calving. Table 1. Quartile distribution (Q1 = 25th percentile, Q2 = 50th percentile, Q3 = 75th percentile) of colostrum mineral concentrations (mg/kg) at first milking

	Ca	P	Mg	K	Na	Fe	Zn	Cu
SHC
Q1	2,000	1,100	280	1,287	619	0.51	13	0.16
Q2	2,200	1,400	330	1,428	759	0.64	18	0.21
Q3	2,600	1,600	380	1,677	980	0.79	23	0.26
NC
Q1	1,600	730	230	936	763	0.66	8.4	0.18
Q2	2,100	1,100	280	1,248	913	0.73	12	0.21
Q3	2,500	1,500	340	1,638	1276	0.87	22	0.30