Parcelamento da fertirrigação nitrogenada na cultura do feijoeiro (Phaseolus vulgaris L.)

Abstract

This work aimed to study the effects of nitrogen fertilization on bean crop (Phaseolus vulgaris L.) grown in conventional tillage system, applied in the traditional manner and fertigation. The experiments were conducted in the experimental area of the Technical Irrigation Center on the campus of State University of Maringá. The treatments were: T1) Plots without coverage fertilization. T2) Coverage fertilization applied manually as a single dose of 60 kg ha-1 at 15 DAE (Days After Emergence). T3) Nitrogen fertigation performed by a single dose of 60 kg ha-1 at 15 DAE. T4) Nitrogen fertigation split in two applications of 30 kg ha-1, at 15 and 30 DAE. T5) Fertigation nitrogen split three times at doses equivalent to 20 kg ha-1 at 15, 30 and 42 DAE. Variables evaluated were number of pods per plant, number of grains per pod, 100-grain mass and grain yield. To evaluate the effects of treatments in these productivity indices of culture, the data were subjected to analysis of variance (F test), and the results evaluated using the mean test Scott-Knott. The results showed that nitrogen provides significant increases in productivity variables of culture, is fundamental in the recommendations for high-yield crops, and when applied through fertigation split in three times, the best results were obtained in relation to other applications fertigated and manual application as a single dose.