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Effects of elevated ozone on Pinus armandii growth: A simulation study with open-top chamber.

LIU Chang-fu1, LIU Chen1, HE Xing-yuan2, RUAN Ya-nan4, XU Sheng2, CHEN Zhen-ju1,2,3, PENG Jun-jie2, LI Teng2   

  1. (1College of Forestry, Shenyang Agricultural University, Shenyang 110866, China; 2State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China; 3Research Station of LiaoheRiver Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Changtu 112500, Liaoning China; 4College of Life Science, Liaoning University, Shenyang 110036, China)
  • Online:2013-10-18 Published:2013-10-18

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Abstract: By using open-top chamber (OTC) and the techniques of dendrochronology, this paper studied the growth of Pinus armandii under elevated ozone, and explored the evolution dynamics and adaptation mechanisms of typical forest ecosystems to ozone enrichment. Elevated ozone inhibited the stem growth of P. armandii significantly, with the annual growth of the stem length and diameter reduced by 35.0% and 12.9%, respectively. The annual growth of treering width and the annual ring cells number decreased by 11.5% and 54.1%, respectively, but no significant change was observed in the diameter of tracheid. At regional scale, the fluctuation of ozone concentration showed significant correlation with the variation of local vegetation growth (NDVI).