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Table 3 Effect of N application on total N concentration of rice leaves with different treatments in different growth seasons

From: Rapid diagnosis of nitrogen status in rice based on Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS)

Experimental station

Seasons

Treatments

Total N (g kg−1)

Tillering stage

Jointing stage

Panicle stage

Mature stage

Tangquan

 

CO

10.58 ± 0.52b

9.95 ± 0.37b

10.52 ± 0.55b

9.97 ± 0.47b

2015

CF

24.98 ± 0.75a

22.00 ± 0.59a

29.11 ± 0.77a

12.45 ± 0.35a

 

OF

28.65 ± 0.68a

26.61 ± 0.85a

25.13 ± 0.65a

12.05 ± 0.38a

 

CO

10.49 ± 0.20b

2016

CF

12.31 ± 0.30a

 

OF

12.40 ± 0.55a

 

CO

10.23 ± 0.26b

2017

CF

11.87 ± 0.65a

 

OF

11.90 ± 0.46a

 

CO

9.86 ± 0.0.57b

2018

CF

11.81 ± 0.44a

 

OF

11.09 ± 0.25

Jiangning

2018

CO

9.51 ± 0.32b

CF

11.28 ± 0.36a

OF

10.68 ± 0.35a

  1. Data are expressed as the means of four replications. Significant differences (P ≤ 0.05) among treatments within each column are indicated with different letters