Abstract
The aim of this study was to determine and evaluate the chemical composition of the seeds of the genus Lupinus and soybeans. The chemical analyses were carried out in frequently grown lupin varieties in Europe (AMIGA, ANDA, ATU, BORUTA, BUTAN, DIETA, JUNO, KARO, PRIMA, ROSE, SONET and WATT) and two locally grown varieties of soybeans (KORADA and VISION). The contents of individual substances in analysed lupin seeds showed large differences in chemical composition of individual lupin varieties (crude protein: 317.06 - 458.86 g kg-1; lipids: 52.15 - 125.76 g kg-1; fibre: 101.21 - 154.23 g kg-1; non-nitrogenous extractive substances: 285.94 - 436.47 g kg-1; starch: 41.31 - 102.65 g kg-1; organic matter: 951.75 - 966.24 g kg-1; ash: 33.76 - 48.25 g kg-1; calcium: 2.29 - 5.10 g kg-1; phosphorus: 4.62 - 8.04 g kg-1; magnesium: 1.36 - 2.51 g kg-1; acid detergent fibre: 133.13 - 209.25 g kg-1). Lupin seeds were characterized by high contents of crude protein; in some varieties they significantly exceeded the content of crude protein in soybeans. In contrast to lupine seeds, soybeans contained a significantly higher content of lipids and lower content of fibre including acid detergent fibre. In lupin seeds, a negative correlation coefficient was found between the crude protein and BNLV content (r = -0.93) and between crude protein and starch content (r = -0.79). A positive correlation (r = 0.76) was found between the starch and BNLV content in lupin seeds. The results of the study provide information not only for growers regarding the choice of individual lupin varieties, but also for breeders who intend to use lupin seeds as suitable components for feed rations and mixtures.
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