Table 3 Grain yield and yield components of the four varieties under different nitrogen rate.

From: The response of grain yield and ear differentiation related traits to nitrogen levels in maize varieties with different nitrogen efficiency

Year

Treatment

Varieties

Grain number per ear

Thousand-kernel weight (g)

Grain yield (t ha−1)

2018

HN

ND19

487.03 ± 9.12a

326.65 ± 7.7a

10.33 ± 0.14a

ND29

507.59 ± 17.78a

303.01 ± 7.04b

10.96 ± 0.27a

ND17

469.34 ± 4.44b

329.34 ± 9.39a

9.86 ± 0.3b

N19022

480.73 ± 6.73ab

324.69 ± 7.72a

9.52 ± 0.13b

LN

ND19

432.40 ± 12.09a

297.11 ± 6.46a

8.44 ± 0.19a

ND29

428.87 ± 10a

280.9 ± 5.6b

8.24 ± 0.25a

ND17

377.01 ± 7.3b

297.99 ± 7.35a

7.12 ± 0.23b

N19022

385.13 ± 7.84b

289.54 ± 8.28ab

7.23 ± 0.28b

2019

HN

ND19

507.65 ± 10.42a

362.16 ± 14.16a

11.45 ± 0.21b

ND29

511.92 ± 4.23a

333.78 ± 7.48b

12.04 ± 0.27a

ND17

482.69 ± 8.39b

361 ± 7.32a

11.03 ± 0.56b

N19022

485.26 ± 13.88b

358.01 ± 11.06a

10.48 ± 0.29c

LN

ND19

455.00 ± 10.96a

320.19 ± 7.34a

9.17 ± 0.29a

ND29

467.72 ± 7.98a

313.87 ± 11.55a

8.98 ± 0.3a

ND17

383.73 ± 2.09b

326.92 ± 12.4a

7.82 ± 0.25b

N19022

388.32 ± 15.6b

316.40 ± 10.86a

8.02 ± 0.19b

F-value

Y

23.67**

120.90**

134.32**

N

684.44**

133.78**

1080.92**

V

74.69**

11.54**

63.25**

Y × V

1.48

0.77

4.79*

Y × V

2.26

0.04

0.03

N × V

14.58**

1.92

7.30**

Y × N × V

2.51

0.31

0.16

  1. HN high nitrogen conditions, LN low nitrogen conditions.
  2. * and **F values significance at 0.05 and 0.01 probability levels, respectively.
  3. Different letters represent significant differences among varieties.
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