Table 2. Grain yield, grain N concentration, total grain N and N harvest index at maturity for the two genotypes studied under four N treatments.

Values are the means of five biological repetitions ± 1 standard error (SE). Statistical groups are given by post-ANOVA Tukey HSD test for α = 0.05.

Genotype	N treatment	Grain yield (g m-2) ±SE	Grain N concentration (%DW) ±SE	Total grain N (g m-2) ±SE	N Harvest Index ±SE
Récital	N 4-LN	527.4 ±62.3 d	2.62 ±0.19 ab	13.47 ±1.33 e	0.41 ±0.02 b
	N4-HN	778.6 ±133.7 cd	2.65 ±0.11ab	20.06 ±2.74 de	0.46 ±0.04 b
	N10-LN	1531.6 ±116.5 a	2.31 ±0.06 b	35.14 ±1.95 abc	0.49 ±0.04 b
	N10-HN	1384.0 ±153.4 ab	2.33 ±0.04 b	32.25 ±3.72 c	0.43 ±0.03 b
Renan	N 4-LN	1281.4 ±80.9 ab	2.68 ±0.03 ab	34.29 ±2.01 bc	0.66 ±0.05 a
	N4-HN	1016.6 ±77.4 bc	2.64 ±0.11 ab	26.51 ±1.35 cd	0.50 ±0.05 b
	N10-LN	1576.3 ±72.5 a	2.81 ±0.08 a	44.28 ±2.52 ab	0.62 ±0.03 a
	N10-HN	1502.8 ±81.4 a	3.04 ±0.10 a	45.41 ±1.62 a	0.48 ±0.03 b