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Table 3 Effect of dietary Met:Lys ratio in the lactation diet on growth performance of piglets

From: Different dietary methionine to lysine ratios in the lactation diet: effects on the performance of sows and their offspring and methionine metabolism in lactating sows

Items

Met:Lys

SEM

P-value

0.27

0.37

0.47

0.57

Linear

Quadratic

Feed

No. of sows

27

30

28

31

    

Litter size, number/litter

 After cross-fostering

11.26

11.5

11.18

11.42

0.09

0.85

0.98

0.58

 At day 7

10.63

10.87

10.14

10.45

0.12

0.24

0.49

0.15

 At day 14

10.22

10.47

9.68

10.13

0.12

0.34

0.56

0.11

 Pigs weaned

9.89

10.13

9.36

9.97

0.13

0.68

0.68

0.15

 Survival rate of piglets, %

87.91

88.20

84.29

87.45

1.02

0.62

0.65

0.53

Piglet mean BW, kge

 After cross-fostering

1.78

1.78

1.74

1.76

0.01

0.24

0.41

0.60

 At day 7c

2.78B

3.13A

3.01AB

3.04A

0.02

0.15

0.33

< 0.0001

 At day 14

4.78

5.11

5.07

5.07

0.03

0.26

0.49

0.12

 At day 21d

6.85b

7.07ab

7.55a

7.25ab

0.04

0.06

0.08

0.02

Piglet ADG, g/de

 Week 1c

143B

191A

174AB

179A

2

< 0.01

< 0.001

< 0.001

 Week 2

280

288

289

285

2

0.83

0.98

0.94

 Week 3

289

300

294

307

2

< 0.001

< 0.001

0.60

 Days 1–21

243

261

256

260

1

0.01

< 0.01

0.25

Litter weight, kge

 After cross-fostering

20.48

20.34

19.46

20.04

0.33

0.47

0.66

0.71

 At day 7

31.54

32.13

31.25

31.54

0.52

0.47

0.75

0.88

 At day 14

51.6

51.63

50.11

50.86

0.76

0.38

0.60

0.84

 At day 21

70.53

71.24

69.10

71.23

1.02

0.80

0.84

0.85

  1. SEM standard error of the mean, BW body weight, ADG average daily gain
  2. c, dMeans in the same row with different letters differ significantly; the different lowercase letters represent P < 0.05, and the different capital letters represent P < 0.01
  3. eThe results of piglet mean BW, ADG and litter weight are expressed as Lsmeans