Biodiesel and biogas are especially important sources of renewable energy in
the world and in Serbia. Biodiesel is used as transportation fuel; biogas is
used for production of electricity and heat. Soybean (Glycine max L.) grain
is the primary source of vegetable protein for food and feed supplements,
also accounts for much of the world?s bio-oil supply. Due to the development
of new technologies for processing agricultural waste into energy, the rate
of increase in the use of alternative fuels is significantly increasing. The
aim of this study was to determine the productivity of soybeans and the
possibility of obtaining biogas from soybeans in divergent years, 2017-2019.
Main effects were monitored, genotypes (G), years (Y) and genotype by years
interaction effects (G x Y) and were used for evaluation of soybean
genotypes in different environments. Soybean varieties were tested for mass
of 1000 grain (MTG), plant height (PH), grain yields (GY) and biogas yield
(BY). Stability of grain and biogas yield was determined to select best
genotype. Results showed that genotype and years had a significant impact on
all measured variables. In all tested years, the biggest GY and BY were at
genotypes G1 (2.40-4.49 t ha-1, and 461.00-641.00 m3 ha-1, respectively) and
G3 (1.97-4.30 t ha-1; i.e. 447.67-620.00 m3 ha-1). Genotype G2 had
statistically significantly lower values for all tested parameters compared
to other tested genotypes. Correlation analysis of some chosen traits showed
different interdependence between measured variables depending on the year
conditions. The results of this study pointed out that among best genotypes
for production of grain and biogas were G1 and G3. From the results of this
study it can be concluded that G x Y trials are important for evaluation of
stability and choosing the most stable genotypes of soybean.
