Aksekili Ertuğrul, Kilic Dudu Duygu, Kutbay Hamdi Güray
Department of Biology, Faculty of Arts and Sciences, University of Ondokuz Mayis, 55139, Kurupelit-Samsun, Turkey.
Pak J Biol Sci. 2007 Nov 1;10(21):3778-85. doi: 10.3923/pjbs.2007.3778.3785.
Foliar mass per area (mg dm(-2)) -based nitrogen and phosphorus concentrations, specific leaf mass (mg dm(-2)) and absolute and proportional resorption in Quercus brantii was investigated along a topographic gradient from 450 to 850 m altitude. Foliar N and P concentrations in Q. brantii exhibited significant differences with respect to topographic position and sampling dates in all of the studied parameters. A sharp decrease was observed from April to September in terms of Specific Leaf Mass (SLM) values. However, mass per area-based absolute and proportional N resorption was lowest at 450 m, while absolute and proportional P resorption was lowest at 850 m. Significant correlations were found between mass per area-based leaf nutrient concentration and foliar resorption except for the correlations between absolute P resorption and foliar P concentrations at 450, 650 and 750 m during full-leaf expansion and 850 m during senescence, respectively.
研究了海拔450至850米地形梯度上，布氏栎基于叶面积质量（毫克·平方分米⁻²）的氮磷浓度、比叶质量（毫克·平方分米⁻²）以及绝对和比例重吸收情况。在所有研究参数中，布氏栎的叶氮和磷浓度在地形位置和采样日期方面均表现出显著差异。从4月到9月，比叶质量（SLM）值急剧下降。然而，基于面积质量的绝对和比例氮重吸收在450米处最低，而绝对和比例磷重吸收在850米处最低。除了在全叶展开期450米、650米和750米以及衰老期850米时，绝对磷重吸收与叶磷浓度之间的相关性外，基于面积质量的叶养分浓度与叶重吸收之间存在显著相关性。
