Determination of effects of divided fertilizer in different growth stage on some yield characteristics of soybean cultivated under water deficit

Abstract

This research was carried out to evaluate the effects of divided fertilizer applications in different growth stages on yield and yield parameters including number of pod and bloom of soybean cultivated under water deficit in 2013. Experiment was designed as factorial design with three replication and five irrigation schedule (as a depletion of available water content, 25%, 50%, 75%, 100% and 125% excessive of depletion). During growth season, the amount of total fertilizer (NPK) required was applied to all treatments (F-0, F-2 ve F-3) during seeding. Whereas nitrate fertilizer that is needed during three different growth period (R1, R2 and R3).was applied by dividing to 2 (F-2) and 3 (F-3).According to the results, the amount of applied irrigation water, evapotranspiration and water use efficiency (WUE) varied between 185.46 and 791.04 mm, 253.51 and 781.71 mm and 0.52-0.89 kgdamm(-1) in different irrigation schedules, respectively. The seed yield in F-0, F-2 and F-3 treatments were obtained 202.76, 299.15, 389.14, 401.63, 417.68 kgda(-1) and 226.08, 293.95, 370.60, 407.08, 414.15 kgda(-1) and 208.61, 265.72, 340.94, 420.50, 439.35 kgda(-1) in I-25, I-50, I-75, I-100, I-125 irrigation levels, respectively.