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Table 4 Basal ileal losses (g/kg DMI) and true ileal digestibility estimated by regression 1

From: Estimation of endogenous protein and amino acid ileal losses in weaned piglets by regression analysis using diets with graded levels of casein

 

BEL2

TID3

R 2(5)

 

a

S.D.4

b

S.D.

 

 Protein

16.95

3.69

97.8

0.3

0.99

Essential amino acids

     

 Arginine

1.36

0.26

99.0

3.8

0.98

 Histidine

0.18

0.10

93.0

1.9

0.99

 Lysine

0.60

0.16

99.4

1.1

0.99

 Isoleucine

0.64

0.17

98.0

1.8

0.99

 Leucine

0.98

0.19

99.5

1.1

0.99

 Valine

0.81

0.18

98.4

1.5

0.99

 Methionine

0.35

0.09

97.0

9.0

0.99

 Phenylalanine

0.63

0.10

100.2

1.0

0.99

 Threonine

0.96

0.21

96.0

2.6

0.99

Non essential amino acids

     

 Alanine

0.99

0.20

97.2

3.5

0.98

 Aspartic acid

1.25

0.26

97.1

2.1

0.99

 Cystine

0.30

0.07

95.3

4.8

0.96

 Glutamic acid

2.18

0.69

97.1

1.7

0.99

 Glycine

0.95

0.13

99.3

3.4

0.98

 Proline

0.97

0.27

98.1

1.6

0.99

 Serine

0.91

0.26

95.0

2.6

0.99

 Tyrosine

0.55

0.09

100.1

1.0

0.99

  1. 1 According to equation: Y = a + bX.
  2. 2BEL Basal endogenous losses (a = intercept, protein or amino acids endogenous losses at ileal level).
  3. 3TID True ileal digestibility (b = slope, proportion of protein or amino acid that disappeared in the digestive tract, per protein or amino acid unit intake).
  4. 4SD Standard deviation of the intercept (a) or slope (b).
  5. 5 R2 Coefficient of determination for regression straight line.