Table 2 The percentage of earbearing tiller (%) and the contribution rate to spikes (%) of main stem (MS) and tiller 1 (T1) of per wheat plant as affected by P application in 3 years.

From: Physiological and developmental traits associated with the grain yield of winter wheat as affected by phosphorus fertilizer management

Year

P level (kg P ha−1)

Percentage of earbearing tiller

Contribution rate to spikes

Main stem

Tiller 1

Main stem

Tiller 1

2015

0

65b

0.0b

99.3a

0.7c

25

100a

5.8b

91.2a

8.8c

50

100a

37.2a

68.7bc

31.3ab

100

100a

45.6a

69.3bc

30.7ab

200

100a

37.4a

72.8b

27.2b

400

100a

42.1a

62.2c

37.8a

2016

0

88b

0.0b

100a

0.0c

25

91b

0.2b

99.8a

0.2c

50

98a

1.9b

98.2ab

1.8bc

100

100a

10.7a

92.7bc

7.3ab

200

100a

11.7a

89.9c

10.1a

400

99a

8.41a

94.3abc

5.7abc

2017

0

95b

7.3c

93.6a

6.4c

25

100a

23.3b

81.5b

18.5b

50

100a

78.8a

56.0c

44.0a

100

100a

87.9a

53.2c

46.8a

200

100a

89.4a

53.0c

47.0a

400

100a

82.0a

55.1c

44.9a

Source of variation

P application rate (P)

***

***

***

***

 

Year (Y)

 

**

***

***

***

P*Y

 

***

***

***

***

  1. Values are means of four replications. Within every year, means followed by different letters are significantly different (P < 0.05). ANOVA results are shown at the bottom: **, and *** indicate significance at P < 0.01, and P < 0.001 levels, respectively.
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