Skip to main content

Table 3 Performance of litter and sow fed high crude protein (HCP; 192.4 g/kg crude protein) and low crude protein (LCP; 140.0 g/kg crude protein) diets and exposed to thermal neutral and heat stress conditionsa

From: Effect of dietary near ideal amino acid profile on heat production of lactating sows exposed to thermal neutral and heat stress conditions

Item

Thermal neutral

Heat stress

HCP

LCP

SEMb

P-value

HCP

LCP

SEMb

P-value

Number of sowsc

6

6

–

–

6

6

–

–

Parity

3

3

–

–

3

4

–

–

Wean day

19

18

–

–

19

17

–

–

Sow ADFId, kg/d

 Overall

6.47

6.01

0.24

0.295

6.47

5.88

0.24

0.185

 Early

5.66

5.20

0.24

0.308

5.73

5.43

0.24

0.505

 Peak

7.36

6.93

0.24

0.347

7.36

6.83

0.24

0.252

Sow BW, kg

 Day 1

217.7

214.0

15.0

0.869

222.0

249.8

15.0

0.220

 Day 10

220.2

211.4

13.7

0.669

223.7

247.5

13.7

0.253

 Wean

209.7

206.7

14.5

0.878

221.4

237.2

14.5

0.422

Sow BW changed, g/d

 Overall

− 433.6

− 426.8

188.5

0.982

−35.6

−790.6

188.5

0.023

 Early

120.0

−154.6

128.6

0.177

83.9

− 142.8

128.6

0.262

 Peak

− 553.7

− 272.2

128.6

0.167

− 119.5*

− 647.8†

128.6

0.014

Sow back fat, mm

 Day 1

14.4

14.5

2.2

0.974

15.0

15.5

2.2

0.834

 Day 10

13.7

13.4

1.8

0.892

14.7

14.6

1.8

0.964

 Wean

12.6

11.3

2.0

0.496

13.5

13.8

2.0

0.898

Sow back fat change, mm/d

 Overall

−0.100

−0.191

0.038

0.246

−0.077

−0.102

0.038

0.749

 Early

−0.043

−0.074

0.039

0.625

−0.015

−0.055

0.039

0.519

 Peak

−0.057

−0.118

0.039

0.336

−0.062

−0.047

0.039

0.803

Litter size

 Day 1

12

11

–

–

12

11

–

–

 Day 10

11

11

–

–

11

11

–

–

 Wean

11

11

–

–

11

10

–

–

Piglet daily gain, g/d

 Overall

259.7

255.2

34.3

0.849

220.3

230.0

34.3

0.683

 Early

251.6

249.0

33.9

0.931

216.7

245.8

33.9

0.341

 Peak

268.8

268.2

33.9

0.985

232.2

231.2

33.9

0.975

Litter weight gain, kg/d

 Overall

2.94

2.81

0.29

0.650

2.49

2.37

0.29

0.663

 Early

2.91

2.74

0.29

0.631

2.56

2.57

0.29

0.970

 Peak

2.98

2.96

0.29

0.962

2.49

2.35

0.29

0.686

  1. aData are least squares means. Overall: d 1-wean; early: d 1–10; peak: d 10-wean
  2. bMaximum value of the standard error of the means
  3. cTwo sows were weaned on days 15 (LCP under TN) and 16 (LCP under HS) and their performance data (feed intake, litter weight gain, piglet ADG for day 10 to weaning) were excluded from the analyses
  4. dThe main effect of lactation stage (early vs. peak) was significant for sow body weight (BW) change and average daily feed intake (ADFI)
  5. *Within the same diet, environments differed (P < 0.05)
  6. †Within the same diet, environments tended to differ for BW change at peak lactation (P = 0.052)
Back to article page

Journal of Animal Science and Biotechnology

ISSN: 2049-1891