EN
The rapeseeds of the Bolko variety with various damage levels (0, 5, 10, 15 and 20 %) and moisture contents (6, 10, 14 and 18 %) were examined for their microbiological changes during storage. The samples were stored in closed containers at 18 ± 2 °C and at relative humidity of air 70 % for a period from 10 days to 12 weeks. The examined seeds were characterised by a low level of microbiological contamination, i.e., 10¹-10³ colony forming units (CFU) per gram. Moisture was the main factor affecting microbiological changes in the seeds during storage. Both growth rate and number of microorganisms directly correlated with water content. Six percent moisture allowed preservation of microbiological quality of the seeds during storage. At 10 % moisture content, an increase in the number of microorganisms during the initial period of storage was observed, while growth rate was in straight correlation to the level of damage. Both microorganism multiplying rate and their population numbers were very high in the seeds containing 14 and 18 % of moisture. Damage of seeds at such a high moisture level had no influence on microorganism growth.
PL
The rapeseeds of the Bolko variety with various damage levels (0, 5, 10, 15 and 20 %) and moisture contents (6, 10, 14 and 18 %) were examined for their microbiological changes during storage. The samples were stored in closed containers at 18 ± 2 °C and at relative humidity of air 70 % for a period from 10 days to 12 weeks. The examined seeds were characterised by a low level of microbiological contamination, i.e., 10¹-10³ colony forming units (CFU) per gram. Moisture was the main factor affecting microbiological changes in the seeds during storage. Both growth rate and number of microorganisms directly correlated with water content. Six percent moisture allowed preservation of microbiological quality of the seeds during storage. At 10 % moisture content, an increase in the number of microorganisms during the initial period of storage was observed, while growth rate was in straight correlation to the level of damage. Both microorganism multiplying rate and their population numbers were very high in the seeds containing 14 and 18 % of moisture. Damage of seeds at such a high moisture level had no influence on microorganism growth.