Research Article

Wpływ zróżnicowanego nawożenia azotem na skład chemiczny ziarna dwóch odmian orkiszu (Triticum aestivum ssp. spelta L.)

Wioletta Biel , Grzegorz Hury, Robert Maciorowski, Anna Kotlarz, Izabela Jaskowska

West Pomeranian University of Technology in Szczecin

1. Acta Sci. Pol. Zootechnica, 9(4), 2010, 5‒14

Abstract. Spelt samples were derived from the plot trials carried out in 2008 at the Lipnik Experimental Station near Szczecin. The treatments were: 4 nitrogen fertilization rates: 0, 40, 80 and 120 kg N·ha^–1 and 2 spelt wheat varieties: Franckenkorn, Oberkulmer Rotkorn. Samples of spelt were analyzed for concentration of chemical composition, dietary fibre, minerals and amino acids. It was shown that spelt grain is rich in such nutritional ingredients. A statistically significantly higher content of protein and a lower value of crude fibre were observed in Oberkulmer Rotkorn cv. compared with Franckenkorn. The protein of spelt was characterized by a favorable amino acid composition of high quality protein which can be confirmed by the EAAI values. The first amino acid limiting the nutritive value of protein was lysine in all samples. Increased nitrogen treatment significantly decreased levels of lignin (by 1.6 g·kg^–1 DM) and ADF fraction (by 4.0 g·kg^–1 DM). The most beneficial content of essential amino acids was determined in Oberkulmer Rotkorn (32 g 16 g^–1 N).

Keywords: amino acids, chemical composition, nitrogen fertilization, nutritional value, speltwheat