Ultraviolet-B Radiation and Nitrogen Affect Nutrient Concentrations and the Amount of Nutrients Acquired by Above-Ground Organs of Maize : Table 1

Table 1: Above-ground shoot dry biomass of maize (g m⁻²) at silking and maturity harvest used to calculate element acquired.


Nitrogen	Radiation	Silking		Maturity
Nitrogen	Radiation	Lb	Sb	Lb	Sb	Gb

N0	UV	139.9	287.9 a	161.2 b	563.3	666.9 b
	C	166.1	328.6 a	192.8 a	636.9	854.4 a
	Mean	153.0 C	308.2 C	177.0 D	600.1 C	760.6 D

N1	UV	147.1	341.9 b	197.9 b	682.7	916.1 b
	C	208.3	529.7 a	243.3 a	961.2	1249.9 a
	Mean	177.7 BC	435.8 B	220.6 C	821.9 B	1083.0 C

N2	UV	168.8	385.2 b	206.2 b	752.1	1015.9 b
	C	237.9	633.4 a	296.4 a	1082.8	1499.2 a
	Mean	203.3 B	509.3 A	251.3 B	917.4 B	1257.5 B

N3	UV	197.6	456.5 b	235.6 b	885.3	1125.6 b
	C	275.6	636.9 a	332.3 a	1204.5	1682.8 a
	Mean	236.6 A	546.7 A	283.9 A	1044.9 A	1404.2 A

Mean	UV	163.3 b	367.9 b	200.2 b	720.8 b	931.1 b
Mean	C	222.0 a	532.1 a	266.2 a	971.3 a	1321.5 a

ANOVA

Radiation (R)		***	***	***	***	***
Nitrogen (N)		***	***	***	***	***
R × N		ns	*	*	ns	*

Lb: leaf biomass; Sb: stem biomass; Gb: grain biomass; UV: high UV-B treatment; C: ambient UV-B treatment; N0, N1, N2, N3: 0, 100, 200, and 300 kg N ha⁻¹.
Means within each N level followed by the same letter (capital letters for N effects within each column) were not significantly different at . Significance of main effects: ns: not significant; *, ***.