ISHS Acta Horticulturae 456: II Modelling Plant Growth, Environmental Control and Farm Management in Protected Cultivation
THE INFLUENCE OF CULTIVAR AND FERTILIZATION ON YIELD AND NO3-N ACCUMULATION IN SPINACH LEAF |
| Authors: | R. Pavlovic, S. Petrovíc, D. Stevanovíc |
| Keywords: | introduced hybrids, N-fertilization, nitrate content, leaf blade, petiole |
| Abstract:
The effect of cultivar - hybrid and that of higher nitrogen amounts (850–200 kg/ha) on yield and accumulation of nitrate nitrogen in edible spinach parts (leaf and petiole), was studied. Spinach was grown under open field conditions over spring cycle on the soil of hard mechanical composition of smonitza type. The domestic cultivar and newly-introduced hybrids, for whose introduction into large-scale production yield and nitrates concentration play an important part, were studied. The results obtained clearly show that in all treatments with usage of higher nitrogen amounts the yield is higher on the average by 27–86%, compared with the control variety. Accordingly, the concentration of nitrate nitrogen was increased in the leaf and even more in the petiole. The highest yields were achieved by the hybrids Vivat (on average 57,0 t/ha) and Triathlon (on average 48,2 t/ha). However, with respect to nitrate nitrogen content the Triathlon hybrid had the highest concentration, i.e. this hybrid is highly prone to nitrate accumulation in edible parts. The Vivat hybrid achieved the highest yields in all experimental treatments, maximally 78,0 t/ha (treatment 4). In addition to extremely high yields, the lowest nitrate concentration was established in edible parts of this hybrid so that it can be recommended for introduction into large-scale production. | |
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