Table 2 The effects of phosphorus (P) level and cultivar (C) on agronomic traits of cotton seedlings in the hydroponic experiment

Root dry weight /(g·plant⁻¹)

0.24 b

0.30 a

-20.0

156.02^**

10.45^**

2.54^**

Shoot dry weight /(g·plant⁻¹)

0.44 b

1.05 a

-58.1

1 452.13^**

10.31^**

3.87^**

Root-to-shoot ratio

0.56 a

0.29 b

93.1

463.4^**

3.61^**

1.66^*

P accumulation in root /(mg·plant⁻¹)

0.35 b

2.30 a

-84.8

3 848.71^**

14.93^**

11.33^**

P accumulation in shoot /(mg·plant⁻¹)

0.55 b

3.78 a

-85.4

3 451.88^**

33.30^**

22.63^**

P utilization efficiency in root /(mg·g⁻¹)

0.74 a

0.14 b

428.6

53 698.29^**

323.36^**

236.43^**

P utilization efficiency in shoot /(mg·g⁻¹)

0.91 a

0.32 b

184.4

33 513.7^**

410.3^**

140.62^**

Plant height /cm

13.13 b

29.87 a

-56.0

2 745.42^**

28.11^**

5.66^**

Number of leaf per plant

4.18 b

6.13 a

-31.8

969.67^**

6.45^**

3.2^**

Leaf area /(cm²·plant⁻¹)

57.87 b

194.71 a

-70.3

1 119.23^**

8.36^**

3.41^**

SPAD value

37.79 a

37.26 a

1.4

2.91NS

14.58^**

4.24^**

Net photosynthetic rate /(μmol·m⁻²·s⁻¹)

9.73 b

16.14 a

-39.7

948.59^**

57.2^**

16.43^**