Folia Forestalia Polonica

DOI-10.1515-frp-2016-0024

Variability of silver fir (Abies alba Mill.) cones – variability of cone parameters

Monika Aniszewska*, Urszula Błuszkowska
Szkoła Główna Gospodarstwa Wiejskiego, Wydział Inżynierii Produkcji, Katedra Maszyn Rolniczych i Leśnych, ul. Nowoursynowska 164, 02-776 Warszawa
*Tel. +48 22 5934520, e-mail: monika_aniszewska@sggw.pl

Abstract. This study aimed at determining the shape of closed silver fir cones from the Jawor Forest District (Wroclaw), based purely on measurements of their length and thickness. Using these two parameters, the most accurate estimations were achieved with a fourth-degree polynomial fitting function. We then calculated the cones’ surface area and volume in three different ways: 1) Using the fourth-degree polynomial shape estimation, 2) Introducing indicators of compliance (k1, k2, k3) to calculate the volume and then comparing it to its actual value as measured in a pitcher filled with water, 3) Comparing the surface area of the cones as calculated with the polynomial function to the value obtained from ratios of indicators of compliance (ratios k4 and k5).We found that the calculated surface area and volume were substantially higher than the corresponding measured values. Test values of cone volume and surface area as calculated by our model were 8% and 5% lower, respectively, compared to direct measurements. We also determined the fir cones apparent density to be 0.8 g·cm-3on average. The gathered data on cone surface area, volume and bulk density is a valuable tool for optimizing the thermal peeling process in mill cabinets to acquire high quality seeds.

Keywords: cone, scales, area, volume, shape

About this article

DOI :

DOI: 10.1515/frp-2016-0024

Source :

Leśne Prace Badawcze, 2016, 77 (3): 221–229

Print ISSN :

1732-9442

Online ISSN :

2082-8926

Type of article :

Original article

Original title :

Zmienność szyszek jodły pospolitej (Abies alba Mill.) – zmienność parametrów zewnętrznych szyszek

Publisher :

Instytut Badawczy Leśnictwa, Sękocin Stary, Poland

Date :

2016, September

 

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