Effects of different water management options and fertilizer supply on photosynthesis, fluorescence parameters and water use efficiency of Prunella vulgaris seedlings

Table 1 Chlorophyll (Chl) a and b contents, Chl a + b content, carotenoid (Car) content of P. vulgaris seedlings under different water (W) and fertilization (F) supply regimes

Treatment	Chla [g kg⁻¹ (FM)]	Chlb [g kg⁻¹ (FM)]	Chla + b [g kg⁻¹ (FM)]	Car [g kg⁻¹ (FM)]
W1/F0	0.40 ± 0.06 d	0.16 ± 0.03 d	0.57 ± 0.10 d	0.10 ± 0.01 d
W1/F1	0.86 ± 0.09 b	0.34 ± 0.04 b	1.19 ± 0.13 b	0.20 ± 0.02 b
W1/F2	0.61 ± 0.10 c	0.25 ± 0.04 c	0.86 ± 0.14 c	0.15 ± 0.02 c
W2/F0	0.42 ± 0.01 d	0.17 ± 0.00 d	0.58 ± 0.02 d	0.12 ± 0.00 d
W2/F1	1.03 ± 0.10 a	0.41 ± 0.03 a	1.45 ± 0.13 a	0.24 ± 0.02 a
W2/F2	1.00 ± 0.04 a	0.40 ± 0.02 a	1.40 ± 0.06 a	0.21 ± 0.01 b
Water (W)	43.68**	43.83**	44.24**	28.78**
Fertilization (F)	120.30**	116.13**	120.52**	89.46**
W × F	14.24**	12.91**	14.01**	3.51

W1 and W2 correspond to soil water contents between 45–50 and 70–75 % of the field water capacity, respectively; F0: no fertilization, F1: 0.12 g N + 0.2 g P₂O₅ + 0.1 g K₂O kg⁻¹ soil, F2: 0.24 g N + 0.4 g P₂O₅ + 0.2 g K₂O kg⁻¹ soil. Different letters indicate significant differences between treatments at P < 0.05 (ANOVA)
Mean ± SD, fresh mass (FM). n = 6, *P < 0.05, **P < 0.01

ISSN: 0717-6287