TABLE 2.

Under each treatment, the ratio of increased N mass to dry weight in aboveground biomass during 29–69 days after planting (DAP) in Exp. 1 and leaves during 27–92 DAP in Exp. 2 (ΔN/ΔDW), the corresponding change percentage to the tissue N concentration on 29 and 27 DAP, as well as the root/shoot ratios of N mass (R/S_N) and dry weight (R/S_DW) on 69 and 92 DAP, respectively.

Treatments		400				625				850
		ΔN/ΔDW (mg g–1)	Change percentage (%)	R/S_N	R/S_DW	ΔN/ΔDW (mg g–1)	Change percentage (%)	R/S_N	R/S_DW	ΔN/ΔDW (mg g–1)	Change percentage (%)	R/S_N	R/S_DW
Exp. 1	N1	29.88 ± 3.24	−29.7	0.15 ± 0.01a	0.33 ± 0.01a	23.24 ± 0.14	−45.33	0.22 ± 0.01a	0.30 ± 0.03a	20.40 ± 0.30	−52.01	0.21 ± 0.01a	0.30 ± 0.01a
	N2	33.02 ± 0.32	−22.32	0.15 ± 0.02a	0.31 ± 0.01b	26.16 ± 0.17	−38.44	0.16 ± 0.01b	0.25 ± 0.02b	23.10 ± 0.57	−45.71	0.16 ± 0.01b	0.24 ± 0.01b
	N3	38.60 ± 1.36	−9.19	0.10 ± 0.01b	0.20 ± 0.02c	30.84 ± 1.27	−27.44	0.11 ± 0.01c	0.17 ± 0.01c	27.10 ± 1.56	−36.25	0.11 ± 0.02c	0.18 ± 0.01c
	N4	38.28 ± 0.27	−9.93	0.10 ± 0.01b	0.16 ± 0.01d	32.30 ± 0.67	−24	0.08 ± 0.01d	0.13 ± 0.01d	31.04 ± 1.08	−26.97	0.09 ± 0.01d	0.12 ± 0.01d
	N5	37.57 ± 1.11	−11.61	0.09 ± 0.01b	0.13 ± 0.01e	37.15 ± 1.21	−12.6	0.06 ± 0.01e	0.10 ± 0.01e	35.66 ± 0.81	−16.09	0.07 ± 0.01e	0.11 ± 0.01d
Exp. 2	LN	29.17 ± 0.32	−50.56	0.17 ± 0.01a	0.38 ± 0.01a	–	–	–	–	24.17 ± 0.16	−59.05	0.17 ± 0.01a	0.34 ± 0.01a
	HN	29.62 ± 0.93	−49.8	0.17 ± 0.01a	0.37 ± 0.01a	–	–	–	–	23.24 ± 0.30	−60.62	0.15 ± 0.01b	0.31 ± 0.02b

Different lowercase letters in the same column indicate significant difference among treatments in each experiment at P < 0.05 tested with one-way ANOVA.