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Table 1 Cotton growth stage and period under different N rate in 2015 and 2016

From: Cotton N rate could be reduced further under the planting model of late sowing and high-density in the Yangtze River valley

Treatments

Growth stages (m-d)

Growth period / d

Emergence

Squaring

First bloom

Boll opening

Seedling

Squaring

Boll setting

Total

2015

 N120

5–27

7–13

8–5

9–21

47a

23a

47a

117a

 N150

5–27

7–13

8–5

9–21

47a

23a

47a

117a

 N180

5–27

7–13

8–4

9–20

47a

22a

47a

116a

 N210

5–27

7–13

8–4

9–20

47a

22a

47a

116a

 N240

5–27

7–13

8–3

9–20

47a

21a

48a

116a

2016

 N120

5–27

7–13

8–1

9–23

47a

19a

53a

119a

 N150

5–27

7–13

7–31

9–22

47a

18a

53a

118a

 N180

5–27

7–13

7–31

9–23

47a

18a

54a

119a

 N210

5–27

7–13

7–31

9–23

47a

18a

54a

119a

 N240

5–27

7–13

8–1

9–22

47a

19a

52a

118a

  1. Means in the same column and the same year followed by different letters are significantly different (P < 0.05) according to LSD test at 0.05 probability level by SPSS 21.0