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.