Table 1.

Different effects of nitrogen fertilization on plant growth and fruit quality for application at different growth stage.

		Yield (kg/plant)	N Concentration of Leaf (mg/kg)	The Total Soluble Solid (TSS) (%)	VC (Vitamin C) Content (mg/kg)
Fertilizing time (T)	PH	27.13 ± 1.41 A	2.82 ± 0.03 A	19.59 ± 0.42	0.45 ± 0.03
	FE	23.60 ± 1.67 B	2.67 ± 0.02 B	20.49 ± 0.39	0.38 ± 0.04
N levles (N)	N0	20.91 ± 2.38 b	2.76 ± 0.09	19.04 ± 1.12 b	0.43 ± 0.07
	N1	26.07 ± 3.85 ab	2.71 ± 0.06	19.74 ± 0.72 ab	0.40 ± 0.07
	N2	32.01 ± 1.87 a	2.78 ± 0.05	20.13± 0.63 ab	0.38 ± 0.08
	N3	22.34 ± 2.78 b	2.75 ± 0.11	21.24 ± 0.98 a	0.46 ± 0.11
Source of variation	T	0.028 *	0.003 **	0.069	0.063
	N	0.001 **	0.684	0.022 *	0.412
	T*N	0.574	0.876	0.041 *	0.001 **

Note: PH represents the application of nitrogen fertilizer during the fruit pit hardening stage; FE represents the application of nitrogen fertilizier during the fruit expanding stage. N0, 0 kg N ha⁻¹; N1, 100 kg N ha⁻¹; N2, 200 kg N ha⁻¹; and N4, 400 kg N ha⁻¹. The statistical results are of two-way ANOVA testing for the effects of N level and fertilizing time on the yield, leaf N concentration, the total soluble solid and VC content. * and **: statistically significant at p < 0.05 and p < 0.01, respectively. Uppercase letters indicate differences between fertilization times and lowercase letters indicate differences at different N levels.