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Table 4 Means Ā± SD for milk yield and milk composition during and after the treatment period1.

From: Rumen-protected conjugated linoleic acid supplementation to dairy cows in late pregnancy and early lactation: effects on milk composition, milk yield, blood metabolites and gene expression in liver

Ā 

Control (n = 5)

CLA (n = 5)

Ā 

1 - 28 DIM

29 - 56 DIM

1 - 28 DIM

29 - 56 DIM

Variable

mean5

SD

mean

SD

mean

SD

mean

SD

milk yield2, kg/day

24.5

2.8

28.8

2.3

24.5

3.3

28.9

2.1

3.5% FCM3, kg/day

30.9

5.4

34.7

5.7

30.4

2.6

33.0

3.5

milk fat4, %

6.10

0.99

5.27

0.78

5.77

0.14

4.97

0.30

milk fat4, kg/day

1.49

0.15

1.52

0.12

1.41

0.16

1.44

0.12

milk protein4, %

3.81

0.12

3.31

0.13

3.82

0.15

3.42

0.13

milk protein4, kg/day

0.93

0.09

0.95

0.07

0.94

0.09

0.99

0.08

milk lactose4, %

4.75

0.28

5.02

0.03

4.72

0.25

4.94

0.02

milk lactose4, kg/day

1.17

0.25

1.43

0.03

1.14

0.28

1.42

0.02

urea4, mmol/L

6.25

1.14

5.28

1.27

5.63

1.26

5.38

0.96

  1. 1CLA supplemented timeframe: d 1 till d 28 of lactation; five primiparous cows received a special supplement including rumen-protected CLA (10 g c 9,t 11-CLA/day and t 10,c 12-CLA/day).
  2. 2Milk yield was recorded at each milking.
  3. 3FCM was calculated like following: (fat [%] Ɨ 0.15 + 0.4) Ɨ milk yield [kg/day]
  4. 4Milk composition was analyzed once daily in the first week after parturition and twice a week from week 2 until week 8 postpartum.
  5. 5Milk yield and milk composition values were reduced to weekly means, means from wk 1 till 4 are pooled to timeframe 1 - 28 DIM, means from week 5 till 8 are pooled to timeframe 29 - 56 DIM
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Acta Veterinaria Scandinavica

ISSN: 1751-0147