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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (2): 503-512.doi: 10.13287/j.1001-9332.202102.027

• Original Articles • Previous Articles     Next Articles

Characteristics of tree-ring density at different stem heights and their climatic responses.

LIU Ke-xiang1, ZHANG Tong-wen1*, ZHANG Rui-bo1, YU Shu-long1, HUANG Li-ping2, JIANG Sheng-xia1, HU Dong-yu2   

  1. 1Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration, Key Laboratory of Tree-ring Ecology of Xinjiang Uigur Autonomous Region, Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
    2Institute of Modern Forestry, Xinjiang Academy of Forestry Science, Urumqi 830000, China
  • Received:2020-07-23 Accepted:2020-11-06 Online:2021-02-15 Published:2021-08-15
  • Contact: *E-mail: zhangtw@idm.cn
  • Supported by:
    Key Laboratory Opening Subject of Xinjiang Uigur Autonomous Region (2018D04028), the National Natural Science Foundation of China (41975095,U1803245), the Tianshan Youth Project of Xinjiang Uigur Autonomous Region-Outstanding Young Talent (2019Q007), and the Basal Research Fund of Central Public Interest Scientific Institution (IDM201202, IDM2018004)

Abstract: Taking windfall woods of Picea schrenkiana in the southern mountainous area of the Ili Prefecture as the research object, tree-ring density chronologies were developed from the discs for maximum density (MXD), minimum density (MID), mean earlywood density (EWD), and mean latewood density (LWD) at five different stem heights (1.3, 5, 10, 15 and 20 m) to examine the climatic responses of tree-ring density by correlation analysis with local meteorological data. The results showed that there was a good coherence among the four types of tree-ring density chronologies for the same stem height, which was relatively significant for the data from 10, 15 and 20 m. The LWD had good coherence among different stem heights, while the climatic responses of tree-ring density at different stem heights varied. The MXD and LWD at 15 m were sensitive to mean tempera-ture from July to September in the previous year and from May to September in the current year. It might underestimate the response of P. schrenkiana to temperature if we sample tree-ring at 1.3 m.

Key words: tree-ring density, stem height, climatic element, Picea schrenkiana, Tianshan Mountains