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Scientia Silvae Sinicae ›› 2019, Vol. 55 ›› Issue (7): 1-16.doi: 10.11707/j.1001-7488.20190701

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Response of Radial Growth of Abies faxoniana and Picea purpurea to Climatic Factors in Subalpine of Western Sichuan

Zhao Zhijiang1,2,3, Guo Wenxia4, Kang Dongwei5, Cui Li6, Zhao Lianjun7, Li Junqing5   

  1. 1. Rural Economy and Regional Development Department, China International Engineering Consulting Corporation Beijing 100048;
    2. Beijing Shunyi Hanshiqiao Wetland Nature Reserve Management Office Beijing 101309;
    3. Institute of Wetlands Research, Chinese Academy of Forestry Beijing 100091;
    4. Chinese Society of Forestry Beijing 100091;
    5. College of Forestry, Beijing Forestry University Beijing 100083;
    6. School of Tourism Sciences, Beijing International Studies University Beijing 100024;
    7. Wanglang Nature Reserve Mianyang 622550
  • Received:2019-01-17 Revised:2019-06-11 Online:2019-07-25 Published:2019-08-16

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Abstract: [Objective] In order to provide a basis for further revealing the response mechanism of forest ecosystem to climate change in various subalpine areas of western Sichuan, the response relationships of radial growth for Abies faxoniana and Picea purpurea to climate factors at the same altitude and in the same habitatwere explored.[Method] The standard chronologies about A. faxoniana and P. purpurea at the middleand high altitudes in Wanglang Nature Reserve were obtained, and the relationships between the chronologies and climate factors were analyzed.[Result] There was a certain "abruption effect" between the fir radial growth and mean annual temperatures at the middle-altitude after 1990. In the middle-altitude habitat,the growth of both species were significantly negatively correlated with the temperature in the previous growing season (the current July and August) and the precipitation at the end of the current growing season (the current October) (P<0.05).The growth of A. faxoniana was significantly negatively correlated with the temperature and precipitation in the current September (P<0.05), and the growth of P. purpurea was significantly positively correlated with the monthly mean minimum temperature in the current February and current June (P<0.05).In the high-altitude habitat,the growth of both species were significantly positively correlated with the temperature before the growing season (the previous November, the current January and February). Moreover during the current growing season (the current July) and previous growing season (the previous June) (P<0.05).The growth of A. faxoniana was significantly negatively correlated with the precipitation in the current June and the temperature in the previous August (P<0.05). The reliability of the response of each chronology to the monthly climate factors was fully verified by the result of sliding correlation analysis and climate factors analysis.[Conclusion] The "lag effect" of temperature in the previous growing season had a significant effect on tree growth of A. faxoniana and P. purpurea in the middle-altitude habitat and A. faxoniana in the high-altitude habitat. In recent decades, the precipitation at the end of the previous growing season had a significant and stable inhibition effect on tree growth of A. faxoniana and P. purpurea in the middle-altitude habitat and P. purpurea in the high-altitude habitat.

Key words: Abies faxoniana, Picea purpurea, radial growth, climate factors, response

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