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.

From: Effect of Plant Density, Boron Nutrition and Growth Regulation on Seed Mass, Emergence and Offspring Growth Plasticity in Cotton

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

  1. 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.
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