REGULAR ARTICLE
The effect of nitrogen fertilization on morphology traits of sweet sorghum cultivated on sandy soil
Ewelina Szydełko-Rabska, Józef Sowiński
Commun. Biometry Crop Sci. (2014) 9 (2), 83-89.
ABSTRACT
The paper presents results of the experiment conducted in 2010-2012 on the influence
of nitrogen fertilizer type (ammonium sulfate, calcium nitrate, ammonium nitrate and urea)
on sweet sorghum cultivated on sandy soil. Selected morphological traits and fresh and dry
matter biomass were analyzed. Although fertilization significantly increased fresh and dry
aboveground biomass, it did not affect sweet sorghum yield. Fresh aboveground biomass was
highest under fertilization with ammonium nitrate (59.3 t ha-1). Fertilization influenced
also yield growth rate, which ranged from 23.3 t ha-1 (under fertilization with urea)
to 26.5 t ha-1 (under fertilization with ammonium nitrate). The highest dry matter content
(26.1%) and dry matter yield (15.3 t ha-1) were obtained under ammonium sulfate.
Nitrogen efficiency was affected by nitrogen fertilization and ranged from 40.4
(under fertilization with urea) to 52.4 kg D.M. kg-1 N (under fertilization with
ammonium sulfate). On the contrary, nitrogen physiological efficiency was not affected.
Key Words: sorghum; nitrogen fertilizers; biometrical measurements; biomass productivity.
