Turkish Journal of Forestry (Dec 2019)
Determination of seedling quality characteristics of stone pine (Pinus pinea L.), valonia oak (Quercus ithaburensis Decne. subsp. macrolepis (Kotschy) Hedge & Yalt.) and Turkey oak (Quercus cerris L.) seedlings
Abstract
This study were determined seedling quality characteristics of stone pine (Pinus pinea L.), valonia oak (Quercus ithaburensis Decne. subsp. macrolepis (Kotschy.) Hedge & Yalt.) and Turkey oak (Quercus cerris L.) seedlings grown at Torbalı Forest Nursery in İzmir province. For that reason, 2+0 aged randomly selected stone pine, valonia oak and Turkey oak seedlings gown in polythene bags which are 12x22.5 cm in dimension have been provided. In each seedlings shoot height (cm), root collar diameter (mm), shoot and root fresh weight (g), shoot and root dry weight (g) were measured. In addition, shoot height/diameter, shoot/root ratio (dry weight basis) and Dickson quality index were calculated. Some mean values of stone pine seedlings were found as 21.02 cm for shoot height, 5.4 mm for root collar diameter, 39.11 for height/diameter ratio, 1.05 for shoot/root ratio, 0.15 for Dickson quality index. Some mean values of valonia oak seedlings were found as 20.6 cm for shoot height, 5.8 mm for root collar diameter, 36.84 for height/diameter ratio, 0.41 for shoot/root ratio, 0.15 for Dickson quality index. Some mean values of Turkey oak seedlings were found as 9.85 cm for shoot height, 4.3 mm for root collar diameter, 23.79 for height/diameter ratio, 0.19 for shoot/root ratio, 0.2 for Dickson quality index. The quality classes of seedlings were evaluated according to the Turkish Standard İnstitute (TSI) called “the standard on coniferous tree seedling (TS 2265, 1988) and “the standard on broad leaved forest tree seedling (TS 5624, 1988). When seedlings shoot height, root collar diameter and shoot/root ratio (dry weight basis) were evaluated together, 97.06 % of the stone pine seedlings were found to be in the Ist quality class, 2.94 % of the stone pine seedlings were found to be in the IInd quality class according to the standard on coniferous tree seedling (TS 2265/February 1988). When the minimum of seedlings shoot height and root collar diameter were evaluated together, 97.06 % of the valonia oak seedlings were found substandard, 2.94 % of the valonia oak seedlings were found in the IInd quality class according to the standard on broad leaved forest tree seedling (TS 5624/ March 1988). When the minimum of seedling shoot height and root collar diameter characteristics were evaluated together, the Turkey oak seedlings were found substandard because the heights of Turkey oak seedlings were lower than the standard. In addition, drought resistance of tree species and visual detection of damage conditions was made. According to this classification, Turkey oak was in the good class, stone pine and valonia oak were in the poor class.
Keywords
