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.

U radu su prikazani efekti istraživanja uticaja dve vrste komercijalnih organskih đubriva (DCM ECO-MIX 4 NPK 7:7:10 i GUANITO NPK 6:15:3) na prinos i strukturu prinosa tri sorte krompira (Cleopatra, Carrera i Sylvana). Kao kontrolna varijanta, korišćena je parcela bez primene organskog đubriva. Poljski ogled izveden je u toku 2012. godine na oglednoj parceli gazdinstva Belča u naseljenom mestu Dobrica (N 45°13', E 20° 51', 78 m.s.l.) na delu na kome je sertifikovana organska proizvodnja, na antropogenizovanom zemljištu podtipa černozem na karbonatnoj terasi. Dobijeni rezultati istraživanja pokazuju da je najmanji prinos krtola utvrđen na kontrolnoj varijanti (20,87 t ha-1), dok je najveći prinos je ostvaren sa komercijalnim organskim đubrivom DCM ECO-MIX 4 (23,96 t ha-1). Broj krtola po biljci odgovarao je sortnim karakteristikama istraživanih sorti. Najveći broj krtola po biljci bio je u korelaciji sa ostvarenim prinosom. Tačnije, pojedinačno su varijante sa dva najveća prinosa imale najveći broj krtola po biljci. Sorta Cleopatra u varijanti sa GUANITOM imala je 17,51 krtola po biljci-1, dok je sorta Sylvana u varijanti sa DCM ECO-MIX 4 postigla 17,38 krtola po biljci.