Reaction of soybean varieties to increased nitrogen fertilization

Abstract

The paper presents the variability of productive traits of six soybean varieties grown in conditions of increased nitrogen nutrition in the period 2006-2008. The trials were conducted in South Banat on the chernozem soil type. Soybean was grown under rain-fed conditions. Morphological traits were analyzed prior to harvest, while the grain yield was measured after harvest. The results show significant variations in the tested traits among the examined genotypes. The highest average yield had variety Sava, while in dry 2006, the higher yields achieved early varieties Proteinka and Valjevka. Increased nitrogen nutrition did not significantly affect the yield, especially in years with favorable rainfall schedule. Differences in production traits varied strongly among experimental years.

U radu je proučavana varijabilnost produktivnih osobina šest sorti soje gajenih u uslovima pojačane ishrane biljaka azotom u periodu od 2006. do 2008. godine. Ogledi su postavljeni u južnom Banatu na zemljištu tipa černozem. Soja je gajena u uslovima prirodnog vodnog režima. Analize morfoloških osobina urađene su pre berbe soje, prinos zrna je određen posle berbe oglednih parcela. Rezultati su pokazali da između genotipova postoje značajna variranja u ispitivanim osobinama. Najveći prosečni prinos imala je sorta Sava, dok su u sušnoj 2006. godini, veće prinose ostvarile rane sorte Proteinka i Valjevka. Pojačana ishrana azotom nije značajno uticala na prinos, posebno u godinama sa povoljnijim rasporedom padavina. Razlike u proizvodnim osobinama su jako varirale po godinama istraživanja.