INFLUENCE OF FERTILISATION TYPE ON THE QUALITY OF VIRGIN RAPESSED OIL
AbstractThe aim of the study was to determine whether, and to what extent, the type of fertilisation employed can affect the quality of the harvested spring rape and the oil extracted therefrom through cold pressing. The present article presents the results of research conducted, among other methods, with the use of ATR-FTIR absorption spectroscopy of selected cold pressed vegetable oils. For comparison, the study included three types of rapeseed oil from spring plants grown with traditional NPK mixture fertilisation and digestate. For the purposes of facilitating the spectroscopic analysis, all analysed samples were checked for moisture, total fatty acid profile, fat and protein content in the selected seed varieties. The oxidative stability of the pressed oil was also determined, as well as soil parameters such as: content of absorbable nutrients and acidity in the experimental plots. The changes in climatic conditions were also continuously monitored, as was the major nutrient content in the digestate used to fertilise some of the plots.
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