Physicochemical properties of lupine growing in the Kaliningrad region

Legume crops are traditionally considered to be rich in health-beneficial bioactive compounds. One of the most promising legumes massively grown in the Kaliningrad region is white lupine. The aim of this work was to study the physico-chemical properties of lupines growing in the Kaliningrad region. Seeds of various lupine species were collected in July from 2020 to 2024 in the Kaliningrad region. The technological indicators, physical composition, physicochemical characteristics and chemical profile of the presented samples were studied. More than 20 lupine samples were examined. All experiments were carried out in triplicate. The arithmetic mean values obtained over 5 years of research (2020–2024) were taken for interpretation and discussion. It was found that the variation step of the anatomical parts of lupine seeds varied from 0.11 to 0.42 %, the average diameter value for the species L. angustifolius, L. albus and L. luteus varied from 5.5 ± 0.1 to 6.8 ± 0.1 mm. A high nature value was noted for L. albus. It was observed that the highest values of thousand-grain weight belong to L. albus. Analysis of the chemical composition of lupine seeds showed that the protein content in studied samples varied from 30.58 to 33.78 %, with the highest amount being present in L. albus. The highest accumulation of lipids was observed in lupine L. angustifolius. The starch content in the studied samples ranged from 19.34 to 22.39 %, with the highest value observed in the L. albus variety. It has been established that among the studied varieties, L. albus stands out as a raw material for producing functional and personalized food products due to its chemical substance content.