Abstract #388

# 388
Dry matter intake, production, body condition score, body weight, and frame size of ProCROSS crossbred versus Holstein cows.
B. N. Shonka-Martin*1, B. J. Heins2, L. B. Hansen1, 1University of Minnesota, St. Paul, MN, 2West Central Research and Outreach Center, Morris, MN.

ProCROSS (Montbeliarde, Viking Red, Holstein) rotational crossbred cows were compared with Holstein cows for DMI, production, BW, BCS, and height during the first 150 d of first, second, and third lactation. Primiparous and multiparous crossbred (n = 63 and n = 43, respectively) and Holstein (n = 60 and n = 37, respectively) cows calved from fall 2014 to spring 2017. Cows were fed the same total mixed ration twice daily, with refusals weighed once daily. The BW was recorded twice weekly, and BCS was evaluated weekly. Height at the hips was recorded monthly. Production estimates were obtained from Best Prediction from monthly test days. Daily DMI and fat plus protein production were summed up to 150 d in milk. Statistical analysis for primiparous cows included the fixed effects of year and breed group, and the multiparous model included breed group and the repeated effect of cow. Primiparous crossbred cows (2807 kg) had less (P < 0.01) mean DMI than Holsteins (2948 kg), but produced a similar (P = 0.73) amount of mean fat plus protein production (331 vs. 329 kg, respectively). The mean BW was not different (P = 0.59) between primiparous crossbred (562 kg) and Holstein (556 kg) cows, although crossbred cows (3.46) had higher (P < 0.01) mean BCS than Holsteins (3.20). For mean hip height, primiparous crossbred cows (142.3 cm) were shorter (P < 0.01) than Holsteins (144.3 cm). Multiparous crossbred cows (3360 kg) consumed less (P = 0.02) mean DMI than Holsteins (3592 kg). Mean fat plus protein production was similar for multiparous crossbred (445 kg) and Holstein (441 kg) cows. Also, multiparous crossbred (636 kg) and Holstein (644 kg) cows did not differ for mean BW, and multiparous crossbred cows (3.25) had higher (P < 0.01) mean BCS than Holsteins (3.06). Multiparous crossbred cows were similar (P = 0.16) for mean height at the hips (145.2 cm) compared with Holsteins (146.4 cm).

Key Words: crossbreeding, feed intake