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Table 5 Litter size of sows that farrowed a second litter by sow group and diet

From: Effect of spray-dried porcine plasma in peripartum sow feed on subsequent litter size

  

Peripartum diet, % SDPPb

 

Statistics (F-test, P =)c

Variable

Groupa

0

0.5

2.5

SEM

PR

D

L

Q

INT

Sows, n

All

138

155

133

–

–

–

–

–

–

Y

87

103

85

–

–

–

–

–

–

P1

45

50

43

–

–

–

–

–

–

P2

42

53

42

–

–

–

–

–

–

M

51

52

48

–

–

–

–

–

–

Total born pigsd

All

14.17

14.42

14.46

0.34

<  0.01

0.75

0.56

0.61

0.03

Y

14.14

15.09

15.49

0.36

0.11

0.02

0.02

0.12

0.82

P1

13.78

14.94

15.05

0.50

     

P2

14.50

15.25

15.93

0.51

     

M

14.46

13.50

13.32

0.56

<  0.01

0.26

0.19

0.25

0.50

Live born pigs

All

12.85

12.92

13.08

0.30

<  0.01

0.86

0.58

0.94

0.21

Y

13.02

13.55

13.97

0.36

0.36

0.18

0.09

0.44

0.72

P1

12.80

13.58

13.60

0.51

     

P2

13.24

13.53

14.33

0.52

     

M

13.05

11.99

11.83

0.55

<  0.01

0.20

0.16

0.20

0.79

Stillborn pigse

All

0.96

1.24

0.98

0.13

0.19

0.09

0.55

0.03

0.54

Y

0.78

1.17

1.00

0.13

0.17

0.06

0.53

0.02

0.84

M

0.96

1.14

1.01

0.22

0.20

0.78

0.97

0.48

0.13

Stillborn, %e

All

6.81

8.05

6.93

0.74

0.16

0.40

0.75

0.19

0.87

Y

6.06

7.83

7.09

0.98

0.37

0.32

0.69

0.14

0.57

M

6.76

7.94

7.79

1.53

0.09

0.82

0.71

0.58

0.32

Mummified pigse

All

0.44

0.40

0.49

0.05

0.66

0.44

0.33

0.41

0.14

Y

0.37

0.40

0.54

0.06

0.26

0.09

0.03

0.99

0.42

M

0.45

0.37

0.48

0.10

0.40

0.60

0.60

0.43

0.43

Mummified, %e

All

3.01

2.73

3.61

0.36

0.21

0.20

0.12

0.37

0.37

Y

2.38

2.71

3.55

0.42

0.26

0.12

0.04

0.86

0.35

M

3.10

2.64

4.24

0.80

0.54

0.22

0.15

0.45

0.31

Total born changef

All

−0.53

−0.30

0.61

0.42

<  0.01

0.13

0.04

0.99

0.05

Y

−0.13

1.01

2.45

0.51

0.76

<  0.01

<  0.01

0.32

0.93

P1

0.07

0.96

2.56

0.72

     

P2

−0.33

1.06

2.33

0.72

     

M

−0.70

− 2.03

−1.68

0.86

0.05

0.48

0.57

0.25

0.83

Live born changef

All

0.16

−0.31

0.68

0.41

<  0.01

0.22

0.18

0.26

0.06

Y

0.26

0.66

2.17

0.50

0.26

0.02

<  0.01

0.96

0.79

P1

0.84

0.88

2.33

0.71

     

P2

−0.33

0.45

2.02

0.71

     

M

0.27

−1.58

−1.31

0.82

0.04

0.19

0.30

0.11

0.95

  1. a Results for group All included data of all sows, group Y included data only for young (parity 1 and parity 2) sows and group M included data only for mature sows (parity 3 to 8). The interaction of diet and parity LSM and SEM are shown for some variables in the Y group as P1 (parity 1 sows) or P2 (parity 2 sows)
  2. b Values are least squares means (LSM) and pooled standard error of the mean (SEM) for peripartum diets by sow group
  3. c Each sow group was analyzed using a mixed model for the effects of PR (sow parity), D (peripartum diet), L (linear contrast of % SDPP in diet), Q (quadratic contrast of % SDPP in diet) and INT (interaction of parity and diet)
  4. d Included the covariance of total born pigs of the initial parturition in the mixed model used for each sow group
  5. e Included the covariance of total born pigs of the next parturition in the mixed model for each sow group
  6. f Total born change is total born litter size of subsequent parturition minus total born litter size of previous parturition. Live born change is live born litter size of subsequent parturition minus live born litter size of previous parturition
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Porcine Health Management

ISSN: 2055-5660

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