Original scientific paper
Growth of Pedunculate Oak Seedlings under Soil Contamination by Mineral and Biodegradable Oils
Milan Oršanić
; Forestry Faculty of Zagreb University Sveto{imunska 25 HR–10000 Zagreb CROATIA
Dubravko Horvat
; Forestry Faculty of Zagreb University Sveto{imunska 25 HR–10000 Zagreb CROATIA
Nikola Pernar
; Forestry Faculty of Zagreb University Sveto{imunska 25 HR–10000 Zagreb CROATIA
Marijan Šušnjar
; Forestry Faculty of Zagreb University Sveto{imunska 25 HR–10000 Zagreb CROATIA
Darko Bakšić
; Forestry Faculty of Zagreb University Sveto{imunska 25 HR–10000 Zagreb CROATIA
Damir Drvodelić
; Forestry Faculty of Zagreb University Sveto{imunska 25 HR–10000 Zagreb CROATIA
Abstract
The purpose of this study is to research the effects of different concentrations of mineral and biodegradable oils for chainsaws on seedling growth of pedunculate oak (Quercus robur L.) during two-year vegetation period. The paper also examines the influence of the above mentioned oils and their concentrations on the development of the seedling root system at the end of the second vegetation. Tests were carried out in forest nurseries on seven 1 m2 plots. Three plots were treated, after the planting of the pedunculate oak acorns, with biodegradable oil in the concentrations of 0.1 L/m2, 0.2 L/m2, and 0.5 L/m2. The other three plots were treated with mineral oil of the same concentrations. The control plot received only seed sowing. The analysis of the root system of the two-year-old seedlings of pedunculate oak was carried out with WinRHIZO ProLA 2400 software. The SAS and Statistica 7 program packages were used for the statistic data processing and for determination of statistically significant differences among variables. Results showed that the lower oil concentration the larger root lengths. The lowest heights of the two-year-old pedunculate oak seedlings were measured from the test plots treated with mineral oil and the highest on those from the plots treated with bio-oil, although the heights of seedlings from the control plots were very close to heights of those treated with bio-oil.
Keywords
pedunculate oak seedlings; mineral oil; biodegradable oil; root system; growth
Hrčak ID:
32191
URI
Publication date:
6.12.2008.
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