In the present study, the variation of key leaf characteristics, such as SLA and
LMA in plant samples collected from four locations were determined using a
Li-Cor portable leaf area measuring device. The effect of seasonal, altitudinal
and climatic variations on SLA and LMA was evaluated. There were
significant differences (P<0.01) in SLA and LMA values in terms of localities,
months, temperature and precipitation. There were both elevation and seasonal
variables in SLA and LMA values. The highest SLA and LMA values were in
May and December, respectively. SLA and LMA values increased and
decreased with increasing elevation, respectively. SLA and LMA of Diospyros
kaki were related with temperature and precipitation. Results indicated that
there were variations on SLA and LMA parameters due to ecological factors.
In the present study, nitrogen (N), phosphorus (P), carbon (C) levels and nutrient contents, N and P resorption were investigated in Diospyros kaki L., whose leaves has a strong antioxidant property and is cultivated in the Eastern Black Sea Region. The research was carried out at four different locations where Diospyros kaki was grown within the provincial borders of Trabzon. Leaf samples were taken from these selected locations monthly from May to December. Soil samples were taken from a depth of 0-20 cm from each locality. Soil N, P and C analysis were also determined. There were important differences in N (%) concentration and N (g dm-2) content values in terms of localities. N, P and C (%) concentration values significantly varied among months. Similarly, there were notable differences in N and P (g dm-2) values depending on months. Nitrogen and phosphorus resorption efficiency (RE) values were below stated boundaries at only 796 m. Nitrogen and phosphorus resorption proficiency (RP) values significantly varied between localities.
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