Table 5.
Emergence, emergence time and seedling vigour index of cotton from seed produced by plants in response to plant density, foliar boron nutrition and mepiquat chloride application.
| Treatments | Final emergence (%) | Mean emergence time (days) | Seedling vigour index | |||
|---|---|---|---|---|---|---|
| 2014 | 2015 | 2014 | 2015 | 2014 | 2015 | |
| Density (D) (plants ha −1 ) | ||||||
| 53333 | 66 ± 2 A | 71 ± 2 A | 4.6 ± 0.1 A | 4.9 ± 0.0 B | 1860 ± 49 A | 1808 ± 48 A |
| 88888 | 60 ± 1 B | 65 ± 2 B | 4.6 ± 0.2 A | 5.0 ± 0.1 A | 1576 ± 39 B | 1562 ± 39 B |
| Boron nutrition (B) | ||||||
| Control | 59 ± 1 B | 63 ± 2 B | 4.8 ± 0.0 A | 5.1 ± 0.1 A | 1526 ± 40 C | 1484 ± 37 C |
| 600 mg/L | 63 ± 3 AB | 69 ± 2 A | 4.5 ± 0.1 B | 4.9 ± 0.1 AB | 1735 ± 53 B | 1726 ± 55 B |
| 1200 mg/L | 67 ± 2 A | 72 ± 4 A | 4.5 ± 0.0 B | 4.9 ± 0.0 B | 1893 ± 64 A | 1845 ± 56 A |
| Mepiquat chloride (MC) | ||||||
| Control | 59 ± 2 B | 64 ± 2 B | 4.7 ± 0.2 A | 5.0 ± 0.1 A | 1537 ± 40 C | 1509 ± 41 C |
| Squaring | 66 ± 4 A | 72 ± 4 A | 4.5 ± 0.1 B | 4.9 ± 0.0 A | 1858 ± 62 A | 1852 ± 57 A |
| Flowering | 64 ± 2 AB | 68 ± 3 AB | 4.5 ± 0.1 B | 4.9 ± 0.1 A | 1759 ± 63 B | 1694 ± 56 B |
| Source of variation (Pr > F) | ||||||
| D | <0.001 | 0.004 | 0.487 | 0.014 | <0.001 | <0.001 |
| B | 0.001 | 0.002 | <0.001 | 0.035 | <0.001 | <0.001 |
| MC | 0.003 | 0.008 | <0.001 | 0.173 | <0.001 | <0.001 |
| D × B | 0.940 | 0.963 | 0.166 | 0.848 | 0.545 | 0.114 |
| D × MC | 0.780 | 0.768 | 0.856 | 0.804 | 0.561 | 0.497 |
| B × MC | 0.908 | 0.921 | 0.600 | 0.783 | 0.009 | 0.039 |
| D × B × MC | 0.908 | 0.961 | 0.976 | 0.991 | 0.229 | 0.093 |
Values are mean ± SE of three replications. Means in a column followed by different letters are significantly different at P < 0.05. Interactions with P < 0.05 are italicized to indicate their significance.