The effect of differentiated nitrogen-potassium fertilization on the yield of onions grown for sets
Department of Vegetable Crops
Leszczyńskiego 58, 20-068 Lublin, Poland
The effect of mineral fertilization on the yield of onions grown for sets was estimated. The experiments were
carried out on mineral soil with a moderate content of macroelements. Mineral fertilization was applied in
the following doses: 75 kg N/ha (N1), 150 kg N/ha (N2),
50 kg P/ha (P), 100 kg K/ha (K1), 200 kg K/ha (K2).
The following treatments were applied: N1PK, N1PK2,
(control, without nutrition).
It was found that mineral fertilization, irrespective of the dose in a particular treatment, caused
a considerable loss of plants. The highest loss (30% on the average) was registered at the nitrogen dose of
150 kg/ha. No significant effect of mineral fertilization on the total yield of onions grown for sets was
observed. However, the highest marketable yield (onions to 25 mm in diameter) and its best structure were obtained
without mineral nutrition and with nutrition at the lowest doses of macroelements (N1PK1).
Tendaj M., 1991. The effect of differentiated nitrogen-potassium ferilization on the
yield of onions grown for sets. Folia Horticulturae III/1: 27-37.