Fig. 6 | Scientific Reports

Fig. 6

From: Synergistic effect of ammonium and potassium on carrot growth, physio-biochemical mechanisms, and water use efficiency under varying irrigation regimes

Fig. 6

The mean interactive impacts of irrigation water levels and different applications and rates of [soil ammonium nitrate (SAN) and foliar potassium humate (FKH)] as individual or combined applications during the growing seasons (2019/2020 and 2020/2021) on (A) Carrot yield and (B) Water use efficiency (WUE). Error bars indicate standard errors from the mean. Bars with different letters are statistically significant at p ≤ 0.05. Abbreviations: T1 (tap water applications) (as control), T2 (SAN = 200 kg N ha− 1), T3 (SAN = 250 kg N ha− 1), T4 (FKH = 200 g 100 L− 1 water), T5 (FKH = 400 g 100 L− 1 water), T6 (SAN + FKH = 200 kg N ha− 1+ FKH = 200 g 100 L− 1 water), T7 (SAN + FKH = 200 kg N ha− 1+ FKH = 400 g 100 L− 1 water), T8 (SAN + FKH = 250 kg N ha− 1+ FKH = 200 g 100 L− 1 water), and T9 (SAN + FKH = 250 kg N ha− 1+ FKH = 400 g 100 L− 1 water).

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