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Table 11 The effect of dietary SID-Lys:ME ratio on the growth of the litter (Exp. 2)

From: The effect of the ratio of standardized ileal digestible lysine to metabolizable energy on growth performance, blood metabolites and hormones of lactating sows

Item

Parity

No.

SID-Lys:ME ratio, g/Mcal

 

P-value

   

2.1

2.4

2.7

3.0

3.3

Mean13

SEM

Treat

Linear

Quadratic

Initial litter weight, kg

1

31

13.57

13.68

14.26

13.41

13.37

13.65x

0.53

0.81

--

--

 

2

32

15.44

16.30

15.17

16.15

15.59

15.74y

0.77

0.85

--

--

 

3+

87

16.59

16.35

16.48

16.13

16.24

16.36y

0.45

0.96

--

--

 

Total

150

15.66

15.80

15.77

15.50

15.61

15.67

0.38

0.98

--

--

Litter weight at weaning, kg1

1

31

68.39d

71.81c

73.01bc

75.28ab

76.15ab

74.40x

2.17

< 0.01

< 0.01

0.84

 

2

32

74.05d

75.07cd

77.30bc

79.99a

78.91ab

76.66y

1.63

< 0.01

< 0.01

0.96

 

3+

87

77.56c

80.31b

81.86b

85.02a

84.92a

81.53z

1.31

< 0.01

< 0.01

< 0.01

 

Total2

150

75.74d

78.33c

79.85b

82.60a

82.34a

79.77

1.16

< 0.01

< 0.01

0.06

Litter weight gain, kg/d1

1

31

1.96c

2.09b

2.13ab

2.21a

2.23a

2.11x

0.05

< 0.01

< 0.01

0.13

 

2

32

2.09c

2.12bc

2.20ab

2.29a

2.25a

2.19y

0.04

< 0.01

< 0.01

0.03

 

3+

87

2.20c

2.30b

2.36b

2.47a

2.47a

2.36z

0.04

< 0.01

< 0.01

0.20

 

Total2

150

2.16d

2.25c

2.30b

2.40a

2.40a

2.30

0.03

< 0.01

< 0.01

0.08

  1. 1Initial litter weight, number of piglets suckling and lactation length were used as covariate in the analysis
  2. 2Parity effect was included in the model
  3. 3Parity effect and treatment effect was included in the model
  4. a, b, c, dWithin a row, values with no common superscript differ significantly (P < 0.05)
  5. x, y, zWithin a column, values with no common superscript differ significantly (P < 0.05)