Table 3.

Effect of drought and heat stresses on nutrient concentrations in root, stem, and leaf of maize hybrids.

Maize cultivars	Treatments	Root			Stem			Leaf
		N (mg/g)	P (mg/g)	K (mg/g)	N (mg/g)	P (mg/g)	K (mg/g)	N (mg/g)	P (mg/g)	K (mg/g)
Xida 319	Ck	19.52 ± 0.81	4.73 ± 0.34	10.14 ± 0.51	13.42 ± 1.42	6.29 ± 0.17	13.74 ± 0.25	17.66 ± 0.92	5.83 ± 0.50	11.60 ± 0.81
	H	19.13 ± 0.27	4.46 ± 0.39	9.26 ± 0.48	12.76 ± 1.65	5.69 ± 0.41	13.26 ± 0.16	17.99 ± 0.86	6.28 ± 0.75	11.74 ± 0.99
	D	18.74 ± 0.21	3.97 ± 0.14	8.88 ± 0.38	10.73 ± 1.37	5.44 ± 0.25	11.20 ± 1.40	13.22 ± 0.15*	4.96 ± 0.18	9.20 ± 1.29
	D + H	15.17 ± 1.07**	3.55 ± 0.71	6.67 ± 0.33**	10.52 ± 0.96	4.92 ± 0.13**	8.81 ± 0.84**	14.47 ± 2.30	5.50 ± 1.34	7.81 ± 1.03*
	Means	18.14	4.18	8.74	11.86	5.58	11.75	15.83	5.64	10.09
Xida 889	Ck	21.62 ± 1.84	4.86 ± 0.21	10.20 ± 0.79	13.50 ± 1.34	7.16 ± 0.27	13.85 ± 0.30	17.85 ± 0.15	5.85 ± 0.22	11.24 ± 0.44
	H	20.10 ± 0.54	4.64 ± 0.26	9.81 ± 0.46	12.74 ± 1.03	5.71 ± 0.28**	13.24 ± 0.56	18.82 ± 0.68	5.98 ± 0.23	11.85 ± 0.87
	D	18.97 ± 0.62	3.92 ± 0.45	8.94 ± 0.42	12.53 ± 1.31	5.11 ± 0.35**	12.60 ± 0.38*	14.47 ± 1.18**	4.98 ± 0.42	10.60 ± 0.62
	D + H	16.65 ± 0.78*	3.63 ± 0.45	7.07 ± 0.58**	10.71 ± 0.52	4.93 ± 0.28**	10.81 ± 0.97*	16.41 ± 0.54	5.57 ± 0.26	8.81 ± 0.82*
	Means	19.33	4.26	8.98	12.37	5.73	12.62	16.89	5.59	10.62

Values are means of three replicates ±SE. For Duncan’s results, means with asterisks are considered as significant different compared with control. *P ≤ 0.05; **P ≤ 0.01.

Ck, control; H, heat stress; D, drought stress and H + D, heat + drought stress.