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Chemical Element Contents in Leaves of 16 Dominant Species from Evergreen Broad-leaved Forest at Nanling Nature Reserve

  • Received Date: 2013-04-27
  • In order to evaluate the nutrient status and the heavy metal concentrations in the leaves of evergreen broad-leaved forest at Nanling Nature Reserve, the characteristics including contents, relationships and variations of N, P, K, Ca, Al, Na, Mg, Mn, Ni, Cu and Pb, were detected in the leaves of 16 dominant species in this reserve. The contents of N and P in leaves of the selected tree species were below the averages, while the concentrations of Ca, K and Mg were within its normal ranges of the terrestrial plants in China. The levels of Mn in the leaves detected were near the background values of Guangdong plants. Fortunately, the concentrations of Al, Ni, Cu, and Pb were within their respective normal ranges in plants. Based on the ratios of leaf N to P, the 16 species detected were all P-limited. Although these species are not suffering from Al, Ni, Cu and Pb at present, there is a potential risk from toxic metals activated by soil acidification caused by acid deposition in south China. Regular monitoring and research on the elemental concentrations in the leaves as well as forest soils in the reserve are scientifically necessary.
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Chemical Element Contents in Leaves of 16 Dominant Species from Evergreen Broad-leaved Forest at Nanling Nature Reserve

  • 1. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 3. Nanling National Nature Reserve, Shaoguan 512727, Guangdong, China

Abstract: In order to evaluate the nutrient status and the heavy metal concentrations in the leaves of evergreen broad-leaved forest at Nanling Nature Reserve, the characteristics including contents, relationships and variations of N, P, K, Ca, Al, Na, Mg, Mn, Ni, Cu and Pb, were detected in the leaves of 16 dominant species in this reserve. The contents of N and P in leaves of the selected tree species were below the averages, while the concentrations of Ca, K and Mg were within its normal ranges of the terrestrial plants in China. The levels of Mn in the leaves detected were near the background values of Guangdong plants. Fortunately, the concentrations of Al, Ni, Cu, and Pb were within their respective normal ranges in plants. Based on the ratios of leaf N to P, the 16 species detected were all P-limited. Although these species are not suffering from Al, Ni, Cu and Pb at present, there is a potential risk from toxic metals activated by soil acidification caused by acid deposition in south China. Regular monitoring and research on the elemental concentrations in the leaves as well as forest soils in the reserve are scientifically necessary.

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