Table 6 Seedling traits (root length, shoot length, root dry biomass and shoot dry biomass) of cotton from seed produced by plants in response to plant density, foliar boron nutrition and mepiquat chloride application.

Treatments	Root length (cm)		Shoot length (cm)		Root dry biomass (mg)		Shoot dry biomass (mg)
Treatments	2014	2015	2014	2015	2014	2015	2014	2015
Density (D) (plants ha ⁻¹ )
53333	7.3 ± 0.4 A	6.9 ± 0. A	20.72 ± 0.8 A	18.7 ± 0.5 A	17.9 ± 1.0 A	14.6 ± 0.4 A	206.7 ± 3.9 A	179.4 ± 3.4 A
88888	6.8 ± 0.1 B	6.4 ± 0.1 B	19.47 ± 0.3 B	17.8 ± 0.3 B	14.7 ± 0.3 B	13.1 ± 0.2 B	186.6 ± 3.1 B	165.0 ± 3.0 B
Boron nutrition (B)
Control	6.6 ± 0.2 B	6.2 ± 0.1 B	19.05 ± 0.3 B	17.5 ± 0.2 B	14.9 ± 0.6 C	12.8 ± 0.2 C	181.9 ± 2.9 C	159.2 ± 2.5 C
600 mg/L	7.1 ± 0.1 A	6.7 ± 0.2 A	20.27 ± 0.4 A	18.4 ± 0.8 AB	16.6 ± 0.7 B	13.9 ± 0.3 B	200.0 ± 4.5 B	173.5 ± 3.5 B
1200 mg/L	7.4 ± 0.4 A	6.9 ± 0.2 A	20.97 ± 0.9 A	18.8 ± 0.3 A	17.4 ± 1.1 A	14.7 ± 0.3 A	208.1 ± 5.0 A	183.9 ± 4.5 A
Mepiquat chloride (MC)
Control	6.7 ± 0.2 B	6.2 ± 0.1 B	19.20 ± 0.3 B	17.5 ± 0.3 B	15.2 ± 0.4 B	12.9 ± 0.2 C	181.6 ± 2.9 B	158.9 ± 2.2 B
Squaring	7.3 ± 0.4 A	6.9 ± 0.2 A	20.79 ± 0.5 A	18.9 ± 0.7 A	17.1 ± 0.7 A	14.7 ± 0.4 A	207.0 ± 4.9 A	180.9 ± 4.0 A
Flowering	7.2 ± 0.2 A	6.7 ± 0.1 A	20.30 ± 0.4 AB	18.3 ± 0.3 AB	16.6 ± 0.5 A	14.0 ± 0.3 B	201.4 ± 4.6 A	176.8 ± 4.4 A
Source of variation (Pr > F)
D	<0.001	<0.001	0.002	0.022	<0.001	<0.001	<0.001	<0.001
B	<0.001	<0.001	0.001	0.019	<0.001	<0.001	<0.001	<0.001
MC	0.001	<0.001	0.005	0.010	<0.001	<0.001	<0.001	<0.001
D × B	0.965	0.119	0.918	0.738	0.553	0.671	0.114	0.912
D × MC	0.635	0.169	0.966	0.745	0.820	0.934	0.417	0.793
B × MC	0.556	0.372	0.574	0.925	0.005	0.029	0.021	0.012
D × B × MC	0.964	0.192	0.966	0.902	0.786	0.989	0.515	0.235

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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