Zeitschrift für Ernährungswissenschaft

, Volume 19, Issue 1, pp 47–49 | Cite as

Chemical and nutritional studies on roselle seeds (Hibiscus sabdariffa L.)

  • M. S. Samy


Unextracted and extracted roselle seeds (Hibiscus sabdariffa L.) were analysed for determining moisture, crude protein, ether extract, nitrogen-free extract, crude fiber, ash, calcium, phosphorus and sulfur.

Digestibility trials with cocks showed that the digestible crude protein, total digestible nutrients, starch value and calculated metabolizable energy for the unextracted roselle seeds were 15.36%, 75.81%, 84.06% and 3184 kcal/kg respectively, the corresponding values for the extracted seeds were 27.50%, 68.83%, 64.23% and 2891 kcal/kg.

Iodine number, saponification number, Reichert-Meissel and Polenske values for the roselle seed oil were 15.63, 258, 1.75 and 1.14 respectively.


Nicht extrahierte und extrahierte Rosellesamen (Hibiscus sabdariffa L.) wurden zur Ermittlung von Feuchtigkeit, Rohprotein, ätherextrakt, stickstofffreiem Extrakt, Rohfasern, Asche, Calcium, Phosphor und Schwefel analysiert.

Verdauungsversuche mit Hähnchen haben gezeigt: Verdaubares Rohprotein, gesamte verdaubare Nährstoffe, Stärkewert und kalkulierte Werte für metabolisierbare Energie für die nicht extrahierten Rosellesamen waren: 15,36%, 75,81%, 84,06% und 3184 kcal/kg entsprechend. Die entsprechenden Werte für die extrahierten Samen waren: 27,50%, 68,83%, 64,23% und 2891 kcal/kg.

Iodnummer, Verseifungsnummer, Reichert-Meissel- und Polenske-Werte für Rosellesamen-öl waren: 15,63%, 258, 1,75 und 1,14 entsprechend.


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Copyright information

© Dr. Dietrich Steinkopff Verlag 1980

Authors and Affiliations

  • M. S. Samy
    • 1
  1. 1.National Research CentreDokki, CairoEgypt

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