INFLUENCE OF FERTILIZERS WITH PROLONGATION EFFECT ON PRODUCTIVITY OF ROOT-CROP VEGETABLES

The creation of the new effective and ecologically safer fertilizers and the investigation of their efficient use are important nowadays.
The possibilities of different nitrogen fertilizers ((calcium ammonium nitre (CAN 27)) N₉₀₊₃₀), nitrogen fertilizer with zeolite (N 26 + 6 % zeolite N₉₀₊₃₀) and zeolite (commercial sign ZeoVit EcoAgro, 25 t ha^-1) and ammonium nitre (AN N₉₀₊₃₀)) have been investigated.
The investigation experiments were carried out on the sandy or sandy-loam Calc(ar)i – Epihypogleyc Luvisols (LVg-p-w-cc) at the Lithuanian Institute of Horticulture in 2004&ndasj;2007. The aims of investigation were to assess the influence of different nitrogen fertilizers on productivity of red beet (‘Pablo F₁’) and edible carrot (‘Samson’). Red beet were grown on the flat surface, 0,5 mln ha^-1 viable seed, carrot – on the ridged surface, 0,8 mln ha^-1 viable seed.
In other cases the sowing scheme was 62 + 8 cm.
The highest marketable yield of red beet (54,7 t ha^-1) and edible carrot (57,6 t ha^-1) and output of marketable yield (79,6 and 71,4%, respectively) were obtained, when nitrogen fertilizer with zeolite (N 26+6% zeolite) N₉₀ + N₃₀) was used.
Using the above mentioned fertilizers the least content of nitrates were obtained (1363,0 and 290 mg kg^-1, respectively). Fertilizing only with phosphorus and potassium fertilizers, it was obtained 24,2 t ha^-1 of standard red beet and ir 49,0 t ha^-1 of standard carrot yield.
The output of standard yield comprised respectively 65,6 and 68,4%, amount of nitrates – 1671,1 and 290 mg kg^-1. Fertilization with nitrogen fertilizers containing calcium and magnesium, influenced red beet standard yield 55%, carrot – 23%, soil nutrients respectively 23% and 67%.

IV Balkan Symposium on Vegetables and Potatoes

O. Bundinienė, D. Kavaliauskaitė, R. Starkutė, C. Bobinas

calcium ammonium nitre, edible carrot, red beet, zeolite

https://doi.org/10.17660/ActaHortic.2009.830.75