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    白天军, 刘苑秋, 温林生, 潘俊, 曹雯, 郑希玲, 邹芹, 邓文平. 庐山日本柳杉早材与晚材年轮宽度对气候变化的响应[J]. 北京林业大学学报, 2020, 42(9): 61-69. DOI: 10.12171/j.1000-1522.20190439
    引用本文: 白天军, 刘苑秋, 温林生, 潘俊, 曹雯, 郑希玲, 邹芹, 邓文平. 庐山日本柳杉早材与晚材年轮宽度对气候变化的响应[J]. 北京林业大学学报, 2020, 42(9): 61-69. DOI: 10.12171/j.1000-1522.20190439
    Bai Tianjun, Liu Yuanqiu, Wen Linsheng, Pan Jun, Cao Wen, Zheng Xiling, Zou Qin, Deng Wengping. Response of earlywood and latewood ring width of Cryptomeria japonica to climate change in Lushan Mountain, eastern China[J]. Journal of Beijing Forestry University, 2020, 42(9): 61-69. DOI: 10.12171/j.1000-1522.20190439
    Citation: Bai Tianjun, Liu Yuanqiu, Wen Linsheng, Pan Jun, Cao Wen, Zheng Xiling, Zou Qin, Deng Wengping. Response of earlywood and latewood ring width of Cryptomeria japonica to climate change in Lushan Mountain, eastern China[J]. Journal of Beijing Forestry University, 2020, 42(9): 61-69. DOI: 10.12171/j.1000-1522.20190439

    庐山日本柳杉早材与晚材年轮宽度对气候变化的响应

    Response of earlywood and latewood ring width of Cryptomeria japonica to climate change in Lushan Mountain, eastern China

    • 摘要:
        目的  研究庐山日本柳杉早材、晚材宽度与温度、降水量的相关关系,以揭示日本柳杉早材、晚材径向生长对气候的响应规律,了解这一区域气候变化对森林生态系统的影响,并为未来气候变化条件下日本柳杉的保护和造林区域选择提供依据。
        方法  以庐山自然保护区的人工林针叶树种日本柳杉为研究对象,采用树木年轮学的方法对日本柳杉进行了树芯样品取样和处理,并建立早材、晚材标准年表,将树木标准年表与庐山地区的气候要素进行相关性分析。
        结果  (1)早材年表各项统计特征均优于晚材年表,相比于晚材的径向生长,早材径向生长对月均温变化更加敏感。(2)该地区年均温度、年降水呈现显著增加的趋势,除了8月份以外,各个月份均温呈上升的趋势。(3)日本柳杉径向生长主要受温度影响,日本柳杉早材生长过程中气温的滞后效应尤为明显,夏季(7月)高温不仅阻碍当年早材年轮宽度的生长,还会影响到下一个生长季早材的形成。生长季时期(4—7月)降水量的增加有利于早材、晚材年轮的形成。
        结论  不同季节温度、降水量变化影响早材、晚材年轮形成与生长。在未来气候变暖的背景下,庐山地区日本柳杉林可能出现生长下降的现象。

       

      Abstract:
        Objective  This paper aims to study the correlations between earlywood width, latewood width of Cryptomeria japonica and temperature as well as precipitation in Lushan Mountain of eastern China, so as to reveal the response of radial growth of C. japonica to climate, to understand the impact of climate change on forest ecosystem in this area, and to provide evidence for the protection of C. japonica and the selection of afforestation area under the condition of climate change in the future.
        Method  Studying the main distribution of forest coniferous species, C. japonica in the Lushan Nature Reserve, the tree core samples of C. japonica were sampled and treated by dendrography, and the standard chronology of earlywood and latewood was established. Correlation analysis of climatic factors in Lushan area with the tree-ring standard chronology was taken.
        Result  (1) All the statistical characteristics of the earlywood chronology were better than the latewood chronology. Compared with the radial growth of the latewood, the radial growth of the earlywood was more sensitive to the change of the monthly mean temperature. (2) The average annual temperature and annual precipitation in this area showed a significant increasing trend, the average temperature in each month showed an upward trend except August. (3) The radial growth of the C. japonica was mainly affected by the temperature, the lag effect of temperature on the growth of earlywood was particularly obvious. High temperature in summer (July) not only hindered the growth of ring width of earlywood in that year, but also affected the formation of earlywood in the next growing season. The increase of precipitation in growing season (April to July) was beneficial to the formation of earlywood and latewood in the growing season.
        Conclusion  The changes of temperature and precipitation in different seasons affect the formation and growth of the earlywood and latewood. Under the background of future climate warming, the C. japonica forest in Lushan area may appear the phenomenon of growth decline.

       

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