Table 3 Leaf nitrogen, sodium, and calcium concentrations of nine cotton cultivars at different K supply levels in hydroponic culture

Cultivars

N /%

Na /%

Ca /%

Adequate K

Low K

KER

Adequate K

Low K

KER

Adequate K

Low K

KER

MNH-886

3.77 ± 0.09

2.57 ± 0.14

68.1

0.07 ± 0.02

0.10 ± 0.01

142.9

2.67 ± 0.21

2.49 ± 0.11

93.3

Cyto-124

3.63 ± 0.12

2.07 ± 0.20

56.9

0.06 ± 0.03

0.09 ± 0.02

150.0

2.62 ± 0.18

2.52 ± 0.16

96.2

CIM-707

3.37 ± 0.18

1.90 ± 0.10

56.4

0.09 ± 0.02

0.13 ± 0.01

144.4

2.76 ± 0.12

2.54 ± 0.13

92.0

FH-142

3.57 ± 0.09

2.07 ± 0.13

57.9

0.08 ± 0.01

0.11 ± 0.03

137.5

2.70 ± 0.13

2.47 ± 0.10

91.5

BS-13

3.47 ± 0.15

1.92 ± 0.08

55.5

0.09 ± 0.04

0.13 ± 0.04

144.4

2.64 ± 0.10

2.51 ± 0.11

95.1

CIM-554

3.67 ± 0.03

2.11 ± 0.23

57.6

0.07 ± 0.01

0.10 ± 0.01

136.4

2.75 ± 0.22

2.55 ± 0.13

92.6

CIM-599

3.43 ± 0.19

1.81 ± 0.08

52.6

0.10 ± 0.03

0.15 ± 0.08

150.0

2.58 ± 0.10

2.43 ± 0.15

94.2

BH-212

3.12 ± 0.10

1.48 ± 0.05

47.5

0.12 ± 0.04

0.19 ± 0.09

158.3

2.47 ± 0.13

2.10 ± 0.13

85.0

FH-901

3.27 ± 0.09

1.58 ± 009

48.4

0.11 ± 0.02

0.17 ± 0.07

154.5

2.41 ± 0.11

2.12 ± 0.09

87.8

Mean

3.48

1.94

55.7

0.09

0.13

146.5

2.62

2.41

92.0

F test:

 Cultivars (C)

0.5384**

0.00532**

0.1405**

 K levels (K)

18.5136**

0.01289**

0.3006**

 C\(\times\)K interaction

0.0236 (NS)

0.00027 (NS)

0.0092**

LSD – value

 Cultivars (C)

0.2924

0.0264

0.0395

 K levels (K)

0.1688

0.0152

0.0228