Uticaj višegodišnjeg đubrenja preduseva na prinos soje

Abstract

Ispitivano je dejstvo višegodisnjeg đubrenja preduseva na prinos soje. Ogled je izveden na zemljištu koje je poslednjih 25 godina đubreno različitim dozama NPK dubriva. Ispitivan je i uticaj nitragina na prinos soje, koja je predsetveno đubrena. Ispitivanja su trajala tri godine (1991-1993). Utvrđeno je da višegodišnje đubrenje, u povoljnim godinama, ne utiče na prinos soje. Međutim, u sušnoj 1992. godini varijanta bez đubrenja (a) dala je najveći prinos, koji je vrlo značajno veći, nego kod varijanti đubrenja (b i c).

Effect of long-term fertilization on soybean yield was studied. A trial was established on a soil that was fertilized with various NPK doses for 25 years. The effect of Nitragin on soybean yield that was fertilized before sowing was studied as well. The trials were conducted for three years (1991-1993). Long-term application of fertilizers had no effect on yield in favourable years. However, in dry years, such as was 1992, the control variant (a) gave the highest yield, that was significantly higher than fertilized variants (b and c).