Table 1.
Output of three-way analysis of variance (ANOVA) and mean value of tomato yield and WUE as affected by the treatment stage, W level and K fertilizer rate.
Fig 1.
Tomato yield as effected by soil moisture and K supply during vegetative growth (VG, a) stage, flower and fruit setting (FS, b) stage, fruit early growth (FG, c) stage, fruit development (FD, d) stage and fruit maturity (FM, e) stage. W1, W2 and W3 denote three soil moisture levels, i.e., 60–70% θf, 70–80% θf and 80–90% θf, respectively. K1, K2 and K3 denote three K application rates, i.e., 0 g K2O·kg-1 soil, 0.46 g K2O·kg-1 soil and 0.92 g K2O·kg-1 soil, respectively. Error bars indicate standard error of the mean (n = 3 or 2). Fw, Fk and Fw×k are the F values of the variance analysis for soil moisture, K rate and their interaction effect, respectively. The symbol of * and ** indicate significant effect at 0.05 and 0.01 level, respectively.
Table 2.
Single effect of soil moisture level or K fertilizer rate during the fruit maturity stage on tomato yield.
Fig 2.
Tomato water use efficiency (WUE) as effected by soil moisture and K supply during vegetative growth (VG, a) stage, flower and fruit setting (FS, b) stage, fruit early growth (FG, c) stage, fruit development (FD, d) stage and fruit maturity (FM, e) stage. W1, W2 and W3 denote three soil moisture levels, i.e., 60–70% θf, 70–80% θf and 80–90% θf, respectively. K1, K2 and K3 denote three K application rates, i.e., 0 g K2O·kg-1 soil, 0.46 g K2O·kg-1 soil and 0.92 g K2O·kg-1 soil, respectively. Error bars indicate standard error of the mean (n = 3 or 2). Fw, Fk and Fw×k are the F values of the variance analysis for soil moisture, K rate and their interaction effect, respectively. The symbol of * and ** indicate significant effect at 0.05 and 0.01 level, respectively.