Physiological Evaluations of Maize Hybrids under Low Nitrogen
Table 1
Effect of nitrogen on plant height chlorophyll content, leaf area index, and intercepted photosynthetically active radiation (PAR) on maize-hybrids in 2014 and 2016 rainy season at Tudun and Zaria combined.
Treatments Year
Tudun Wada
Zaria
Plant height
Chlorophyll content
LAI
IPAR
Plant height
Chlorophyll content
LAI
IPAR
(cm)
(SPAD)
(μmol m−2s−2)
(cm)
(SPAD)
(μmol m−2s−2)
2014
182.90
35.88
1.35
0.25
189.00
35.59
2.48
0.48
2016
176.70
36.28
1.32
2.32
175.00
40.45
2.32
2.24
SED
6.081
0.796
0.899
0.083
4.765
0.318
0.182
0.055
Nitrogen (kg N ha-1)
0
177.50
33.54
1.29
0.94
126.00
29.15
1.89
1.16
120
182.20
38.62
2.31
1.64
178.00
46.89
2.91
1.56
SED
4.313
0.593
0.062
0.091
1.541
16.034
0.121
0.082
Hybrid
M0826-7
172.90
33.97
0.42
1.24
184.00
41.23
2.44
1.40
M0926-8
180.70
35.28
0.49
1.32
174.00
37.94
2.46
1.55
M1026-10
174.40
38.61
0.47
1.30
190.00
37.78
2.53
1.42
M1026-13
189.30
38.65
0.47
1.21
187.00
39.48
2.40
1.63
M1124-10
184.40
38.68
0.47
1.43
186.00
39.97
2.35
1.15
M1124-4
176.10
37.78
0.47
1.35
185.00
37.11
2.31
1.44
M1227-12
186.50
34.77
0.49
1.08
183.00
37.06
2.51
1.21
M1227-14
176.20
36.75
0.52
1.38
181.00
39.16
2.55
1.34
Oba – 98
180.10
33.74
0.48
1.22
160.00
34.97
2.47
1.26
Oba – Super -1
177.40
32.58
0.52
1.34
161.00
35.49
2.25
1.24
SED
6.659
3.283
0.083
0.097
7.392
2.194
0.152
0.216
Interaction
Y N
NS
NS
NS
NS
Y H
NS
NS
NS
NS
NS
NS
NS
N H
NS
NS
NS
NS
NS
NS
NS
NS
Y N H
NS
NS
NS
NS
NS
NS
NS
NS
Means followed by the same letter(s) within columns are not significantly different using Fisher’s protected LSD. NS = not significant at 5% level of confidence. SED = standard error of a difference. Y = year. P = population. H = hybrids.