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Table 2 Weekly growth parameters (1–9 wk of age), daily starter intake and average daily gain (1–56 d of age) in calves born to Holstein cows offered a control diet (CON) or CON supplemented with ethyl-cellulose rumen-protected Met (Mepron® at 0.09% of diet DM; Evonik Nutrition & Care GmbH, Germany) during the last 28 d of pregnancy. A subset of calves born to CON cows received CON colostrum (CC, n = 21) or Met colostrum (CM, n = 18). Similarly, a subset of calves born to Met cows received Met colostrum (MM, n = 22) or CON colostrum (MC, n = 20). The interactions of maternal diet × sex or colostrum × sex were not signiciant (P > 0.05). Longitudinal means for body weight, hip height, wither height, and starter intake in calves born to CON cows or Met cows are reported in Additional file 1: Figure S1

From: Maternal supply of methionine during late-pregnancy enhances rate of Holstein calf development in utero and postnatal growth to a greater extent than colostrum source

Item Maternal diet Colostrum type   P value1
CON MET CON MET SEM M C T M × C Sex M × T C × T
Body weight, kg 59.3b 62.4a 61.1 60.5 1.9 0.02 0.66 < 0.01 0.77 0.01 0.31 0.41
Hip height, cm 86.9b 88.8a 87.5 88.1 0.68 < 0.01 0.34 < 0.01 0.40 0.25 0.80 0.18
Hip width, cm 20.3 20.6 20.3 20.6 0.32 0.26 0.17 < 0.01 0.78 < 0.01 0.49 0.24
Wither height, cm 82.7b 84.5a 83.3 83.9 0.67 < 0.01 0.31 < 0.01 0.99 0.37 0.53 0.11
Body length, cm 126 128 127 126 1.01 0.17 0.68 < 0.01 0.20 < 0.01 0.53 0.77
Daily starter intake, kg 0.79 0.85 0.80 0.84 0.09 0.19 0.39 < 0.01 0.82 0.87 0.27 0.95
Average daily gain, kg 0.67b 0.72a 0.68 0.71 0.02 0.03 0.21 0.65 0.33
Feed efficiency2 0.77 0.78 0.79 0.75 0.04 0.74 0.31 0.30 0.68
Rectal T, °C 38.3 38.7 38.4 38.7 0.26 0.32 0.39 < 0.01 0.33 0.28 0.57 0.47
Fecal score3 1.83a 1.71b 1.80 1.74 0.09 0.07 0.34 < 0.01 0.67 0.09 0.53 0.13
Respiratory score4 1.08 1.06 1.07 1.06 0.03 0.61 0.79 0.13 0.17 0.11 0.87 0.92
  1. 1M, maternal diet effect, C colostrum type effect, T time effect.
  2. 2Feed efficiency (total gain/total DMI).
  3. 3Fecal score base on appearance: 1 = Firm well formed; 2 = Soft, pudding like; 3 = Runny, package batter; 4 = Liquid, splatters.
  4. 4Respiratory score base on appearance: 1 = Normal; 2 = Runny rose; 3 = Heavy breathing; 4 = Cough moist; 5 = Cough dry.
  5. a,bMeans on the same row differ (P ≤ 0.05).