Fluctuation of Protein Nitrogen Level in Tubers of Helianthus tuberosus L. Caused by Varying Levels of Nitrogen Fertilisation

• Autorzy: Sawicka B. , Kalembasa S.

Warianty tytułu

PL

Fluktuacja azotu białkowego w bulwach Helianthus tuberosus L. w warunkach zróżnicowanego nawożenia mineralnego

• Języki publikacji: EN

Abstrakty

EN

The effect of nitrogen fertilisation against potassium and phosphorus fertilisation on the total and true protein content in tubers of Helianthus tuberosus L. was examined. Two cultivars of the test plant (Albik and Rubik) were cultivated for 3 years in a field experiment on slightly acidic soil with a granulometric composition of loamy sand. The experimental objects were: 1) control – no fertilisation; 2) PK fertilisation at kg ha^–1; 52.4 – P and 149.4 – K and (against PK fertilisation) four levels of nitrogen fertilisation: 50, 100, 150 and 200 kg ha^–1. The total protein in tubers was calculated by multiplying the nitrogen content determined by the Kjeldahl method by 6.25, while the true protein content was determined by the Bernstein method. The protein content in tubers of the Jerusalem artichoke cultivars under study was significantly affected by their genetic features. The Rubik cultivar was found to contain significantly more of both forms of protein than the Albik cultivar. Irrespective of the cultivar, phosphorus and potassium fertilisation increased the total protein content compared with the control. The application of nitrogen at a dose as low as 50 kg ha^–1 increased the content of both forms of protein.

PL

Badano wpływ nawożenia azotem, na tle nawożenia fosforowo-potasowego, na zawartość białka ogólnego i właściwego w bulwach Helianthus tuberosus. W 3-letnim doświadczeniu polowym, na glebie lekko kwaśnej, o składzie granulometrycznym piasku gliniastego mocnego, oceniano dwie odmiany słonecznika bulwiastego (Albik i Rubik). Obiektami doświadczenia były: 1) kontrola bez nawożenia, 2) cztery poziomy nawożenia azotem: 50, 100, 150 i 200 kg ha^–1 na tle stałego nawożenia fosforowo-potasowego (52,4 kgP ha^–1 i 149,4 kgK ha^–1) i pełnej dawki obornika (25 Mg ha^–1). Całkowitą zawartość białka w bulwach określano, mnożąc zawartość azotu ogólnego oznaczonego metodą Kjeldahla przez 6,25, a zawartość białka właściwego oceniano metodą Bernsteina. Zawartość białka w bulwach Helianthus tuberosus zależała istotnie od cech genetycznych badanych odmian. Stwierdzono, iż odmiana Rubik zawierała znacznie więcej obu form białka niż odmiana Albik. Nawożenie fosforowo-potasowe zwiększało poziom białka ogólnego, w stosunku do obiektu kontrolnego, w bulwach Helianthus tuberosus, niezależnie od odmiany. Stosowanie azotu w dawce 50 kgN ha^–1 powodowało istotny wzrost zawartości obu form białka.

Słowa kluczowe

EN

Jerusalem artichoke; cultivar; total protein content; protein proper; share of proper protein in total protein

PL

słonecznik bulwiasty; odmiany; zawartość białka ogólnego i właściwego; udział białka właściwego w białku ogółem

• Wydawca: Towarzystwo Chemii i Inżynierii Ekologicznej
• Czasopismo: Ecological Chemistry and Engineering. A
• Rocznik: 2013
• Tom: Vol. 20, nr 2
• Strony: 213--223
• Opis fizyczny: Bibliogr. 23 poz., tab., wykr.

Twórcy

autor

Sawicka B.

• Department of Plant Production Technology and Commodity, University of Life Sciences in Lublin, ul. Akademicka 15, 20–950 Lublin, Poland

autor

Kalembasa S.

• Department of Soil Science and Agricultural Chemistry, Siedlce University of Natural Sciences and Humanities, ul. B. Prusa 14, 08–110 Siedlce, Poland

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