Table 2. Effects of fertilization levels on the chlorophyll fluorecence parameters of Lonicera ruprechtiana.

Treatments	Fo	Fm	Fv/Fm	NPQ
Control	0.66 a(±0.09)	2.75 a(±0.44)	0.76 nsz(±0.02)	1.1 nsz(±0.39)
500 mg/L	0.56 b(±0.04)	2.57 ab(±0.17)	0.78(±0.01)	0.66(±0.24)
1,000 mg/L	0.56 b(±0.04)	2.57 ab(±0.24)	0.78(±0.01)	0.65(±0.32)
2,000 mg/L	0.48 c(±0.01)	2.18 b(±0.22)	0.78(±0.03)	0.67(±0.32)

ns: non-significance at p < 0.05 among different level of fertilization within the same pigment.