Original scientific paper
A comparison of morphological and physical characteristics of three different haselnut varieties (Corylus avellana L.)
R. Bernik
; Biotechnical Faculty, Department of Agronomy,Jamnikarjeva 101, Ljubljana, Slovenija
D. Stajnko
; Faculty of Agriculture and Life Sciences, Pivola 10, Hoče, Slovenija
Abstract
Morphological and physical characteristics of three hazelnut (Corylus avellana L.) varieties (‘Istrska dolgoplodna leska’, ‘Tonda gentile delle langhe’ and ‘Fertile de coutard’) were examined in the trial to determine the parameters of the machine for mechanical crushing of hazelnuts. Three morphological characteristics (height, diameter and mass) and three physical characteristics (force, shell deformation and energy impact for shell crushing) were measured on the laboratory device. The maximum force (367.04 N) for crushing hazelnut shells by the diameter was measured with ‘Istrska dolgoplodna leska’, while for crushing by the height the maximum force was determined with the ‘Fertile de coutard’ variety (526.15 N). The biggest shell deformation in crushing by the height (1.00 mm) as well as by the diameter (1.11 mm) was measured with ‘Istrska dolgoplodna leska’. The most energy for crushing the shell by the nut height was required by ‘Fertile de coutard’ (0.24 J), while for crushing the shell by the diameter 0.22 J the most energy was spent by ‘Istrska dolgoplodna leska’. According to the morphological and mechanical characteristics of the shell, the ‘Istrska dolgoplodna leska’ variety was suggested to be the most suitable for mechanical crushing.
Keywords
hazelnut,; morphological characteristics; linear discriminant analysis
Hrčak ID:
37594
URI
Publication date:
15.4.2009.
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