Table 5.
Correlation coefficients between chemical characteristics, physical characteristics and energy values of the 100 corn samples
| Item | DE | ME | Crude protein | Ether extract | ADF | NDF | Ash | Gross energy | Starch | Bulk weight | 1,000 kernel weight |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DE |
1.00 |
|
|
|
|
|
|
|
|
|
|
| ME |
0.95** |
1.00 |
|
|
|
|
|
|
|
|
|
| Crude protein |
−0.15 |
−0.06 |
1.00 |
|
|
|
|
|
|
|
|
| Ether extract |
0.44** |
0.29** |
−0.28 |
1.00 |
|
|
|
|
|
|
|
| ADF |
−0.05 |
−0.06 |
−0.05 |
0.33 |
1.00 |
|
|
|
|
|
|
| NDF |
−0.32** |
−0.27** |
0.14 |
−0.02 |
0.68 |
1.00 |
|
|
|
|
|
| Ash |
−0.29* |
−0.28** |
0.22 |
−0.27 |
−0.11 |
0.17 |
1.00 |
|
|
|
|
| Gross energy |
0.25** |
0.23 |
−0.06 |
0.14 |
−0.28 |
0.19 |
0.07 |
1.00 |
|
|
|
| Starch |
0.38** |
0.32* |
−0.03 |
0.03 |
0.13 |
0.11 |
−0.12 |
0.06 |
1.00 |
|
|
| Bulk weight |
0.05 |
0.03 |
0.03 |
0.15 |
−0.16 |
0.13 |
0.22 |
0.05 |
−0.13 |
1.00 |
|
| 1,000 kernel weight | 0.11 | 0.06 | 0.25 | 0.02 | −0.06 | −0.13 | 0.08 | 0.14 | −0.11 | 0.42 | 1.00 |
*, **, P < 0.05, P < 0.01, respectively.