The influence of row spacing and soybean varieties on plant stem thickness under irrigation conditions

Abstract

During 2003 and 2004, research was conducted with the aim of establishing to which extent the application of row spacing influenced soybean stem thickness under irrigation conditions. Results were processed using two-way analysis of variance for a split-plot experiment (Hadzivukovic, 1991). Examination factors were variety (big plot) and different row spacing (under plot). The average largest stem thickness (6.17 mm) was found in the variety Vojvodjanka. Differences among varieties in stem thickness existed but were not large enough to be significant. The largest stem thickness was noted with a row spacing of 70 cm. In the best metrological year for soybean production, significant differences were observed between the row spacing of 70 cm and the other two spacings (25 and 50 cm). A positive correlation between yield per plant and stem thickness of soybean was established. Based on the results, cultural practice recommendations were made for the soybean production.

Tokom 2003. i 2004. godine obavljena su istraživanja sa ciljem da se ustanovi u kojoj meri promena međurednog razmaka utiče na debljinu stabljike soje u uslovima navodnjavanja. Podaci su obrađeni analizom varijanse po metodi dvofaktorijalnog split-plot ogleda, gde su faktori ispitivanja: sorta (velika parcela) i međuredni razmak (podparcela) (Hadživuković, 1991). Prosečno najveću debljinu stabljike (6.17 mm) imala je sorta Vojvođanka. Razlike između sorti u debljini stabljike su postojale, ali nisu bile dovoljno velike da bi bile značajne. Najveća debljina stabljike zabeležena je na međuredu 70 cm. U vremenski povoljnoj godini za proizvodnju soje razlike su bile značajne u odnosu na 25 i 50 cm. Utvrđena je pozitivna korelacija između debljine stabljike i prinosa zrna po biljci. Na osnovu dobijenih rezultata preporučuje se primena sortne agrotehnike u proizvodnji soje.