Research Article

Optimization of Controlled Water and Nitrogen Fertigation on Greenhouse Culture of Capsicum annuum

Figure 1

Effects of different water and nitrogen levels on dry matter content of greenhouse sweet pepper. Panel (a) shows treatment W105 corresponding to an irrigation of 105% of the reference crop evapotranspiration ET0, panel (b) shows treatment W0.90, panel (c) shows W0.75, and panel (d) shows treatment W0.60 (60% ET0). The black curves represent treatment N1.00 (100% of recommended N fertilizer, 300 kg⋅hm−2), red curves show N0.75, blue shows N0.50, and light green shows N0.25 (5% of recommended N fertilizer).
(a) treatment
(b) treatment
(c) treatment
(d) treatment