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Table 4 Effect of growing region on chemical characteristics, physical characteristics and energy values of the 100 corn samples from five provinces

From: Predicting corn digestible and metabolizable energy content from its chemical composition in growing pigs

Item

Liaoning

Jilin

Hebei

Henan

Shandong

SEM

P-value

Chemical composition, % of DM

Dry matter

87.57b

88.15a

86.82c

86.49d

88.20a

0.47

0.01

Crude protein

9.87a

9.78a

9.38b

9.61ab

9.82a

0.47

0.01

Ether extract

3.54b

3.38b

4.05a

3.71b

3.56b

0.05

0.01

ADF

2.28b

2.22b

2.46a

2.29b

2.25b

0.22

0.01

NDF

10.95bc

10.73c

10.76c

11.76a

11.46ab

0.86

0.01

Ash

1.61

1.62

1.58

1.60

1.63

0.10

0.55

Starch

70.58c

73.20b

72.97b

75.32a

71.79bc

2.97

0.01

Physical characteristic

Bulk weight, g/L

693.29

689.94

699.21

707.94

703.04

25.60

0.18

1,000 kernel weight, g

354.69a

363.60a

302.19b

299.70b

307.38b

30.92

0.01

Energy concentration, kcal/kg of DM

Gross energy

4448.16b

4436.57b

4435.73b

4476.82a

4436.69b

18.23

0.01

Digestible energy

4032.85b

4035.85b

4093.45a

4106.23a

3996.61c

45.20

0.01

Metabolisable energy

3906.83b

3903.14b

3970.06a

3968.63a

3868.94c

40.61

0.01

  1. a-d Means followed by the same letter within each row are not significantly different from each other (P > 0.05).