. 2013 Jul 30;64(11):3179–3188. doi: 10.1093/jxb/ert154

Table 4.

Effects of [CO₂] (A, ambient; E, elevated) and nitrogen fertilization levels (0g m^–2 and 8g m^–2) on grain mass, grain carbon, and grain nitrogen in superior and inferior spikelets of Koshihikari in 2011 and the results of an analysis of variance (ANOVA)

N applied (g m^–2)	Grain mass (mg kernel^–1)				C concentration (mg g^–1)				C content (mg kernel^–1)				N concentration (mg g^–1)				N content (mg kernel^–1)
	Superior		Inferior		Superior		Inferior		Superior		Inferior		Superior		Inferior		Superior		Inferior
	A	E	A	E	A	E	A	E	A	E	A	E	A	E	A	E	A	E	A	E
0	18.3	18.5	13.9	12.2	452	447	452	455	8.3	8.3	6.3	5.6	9.1	8.4	11.6	12.0	0.16	0.16	0.16	0.15
8	20.5	19.8	13.7	15.5	447	457	442	447	9.2	9.0	6.0	6.9	10.0	7.9	14.5	13.4	0.21	0.16	0.20	0.21
ANOVA^a
CO₂	NS		NS		NS		NS		NS		NS		*		NS		**		NS
N	***		*		NS		*		***		†		NS		NS		*		†
CO₂×N	†		*		*		NS		NS		*		NS		NS		*		NS

^a †P < 0.1; *P < 0.05; **P < 0.01; ***P < 0.001; NS, not significant.