|
Year
|
Treatment
|
Peak flower stage (PFS)
|
Boll-setting stage (BSS)
|
Boll-opening stage (BOS)
|
|---|
|
K /(mg·kg−1)
|
N /(mg·kg−1)
|
P /(mg·kg−1)
|
K /(mg·kg−1)
|
N /(mg·kg−1)
|
P /(mg·kg−1)
|
K /(mg·kg−1)
|
N /(mg·kg−1)
|
P /(mg·kg−1)
|
|---|
|
2012
|
CK
|
29.45 a
|
32.01 a
|
3.17 a
|
13.59 c
|
25.02 a
|
2.95 a
|
8.84 b
|
16.38 b
|
2.25 a
|
|
K150
|
31.24 a
|
31.65 a
|
2.98 a
|
18.55 b
|
27.04 a
|
3.23 a
|
16.09 a
|
20.29 a
|
2.54 a
|
|
W9000
|
34.05 a
|
29.97 a
|
3.16 a
|
21.66 a
|
27.84 a
|
3.18 a
|
18.51 a
|
21.95 a
|
2.54 a
|
|
2013
|
CK
|
23.80 b
|
37.04 a
|
3.54 a
|
10.48 c
|
26.46 b
|
2.65 a
|
9.09 b
|
15.94 b
|
2.25 a
|
|
K150
|
32.83 a
|
36.80 a
|
3.40 a
|
17.42 b
|
30.33 a
|
2.82 a
|
15.81 a
|
18.68 a
|
2.31 a
|
|
W9000
|
30.45 a
|
35.57 a
|
3.32 a
|
21.89 a
|
29.06 a
|
2.68 a
|
16.49 a
|
20.11 a
|
2.38 a
|
- CK, no crop straw and K fertilizer were applied as the blank control treatment; K150, 150 k·gha−1 K2O was applied before transplanting the cotton seedlings; and W9000, 9 000 kg·ha−1 wheat straw was crushed and incorporated in 0∼10 cm soil before transplanting. Values followed by different letters within the same column are significantly different at P = 0.05. Each value represents the mean of three replications
