Effects of commercial organic fertilizers on the yield and yield structure of potato cultivars

Abstract

The research work has dealt with investigations of two type commercial organic fertilizers (DCM ECO-MIX 4 NPK 7:7:10 i GUANITO NPK 6:15:3) effects on the yield and yield structure of three potato cultivars (Cleopatra, Carrera and Sylvana). The control variant was used in plots without the use of organic fertilizers. The field experiment was performed in 2012. in a populated area Dobrica (N 45° 13’, E 20° 51’, 78 m.s.l.) at the experimental farm plot Belča on which is certified organic production, on anthropogenic soil subtype chernozem on carbonate terrace. The results of research showed that the lowest tuber yield was determined in the control treatment (20,87 t ha-1), while the highest yield was achieved with a commercial organic fertilizer DCM ECO-MIX 4 (23,96 t ha-1). Number of tubers per plant corresponded to the characteristics of the studied cultivars. The largest number of tubers per plant was correlated with yield. Specifically, individual variants of the two greatest yields had the highest average number of tubers per plant. Cultivar Cleopatra of variant with GUANITO achieved 17,51 tubers per plant, while cultivar Sylvana of variant with DCM ECO-MIX 4 achieved 17,38 tubers per plant.

Keywords

• potato
• commercial organic fertilizers
• yield of tubers
• structure yields