广西柳州杉木种源树轮宽度对温度与湿度的年际响应

目的]为选择适合试验区域未来气候变化条件下生长的杉木种源,方法]运用年轮气候学方法,研究52个杉木地理种源3个树轮宽度指标对气候因子的响应。结果]整轮宽度、早材宽度和晚材宽度与年平均气温的响应呈强负相关关系,相关系数最大值分别为-0.515、-0.590和-0.451;整轮宽度、早材宽度和晚材宽度与年最高气温均呈强负相关关系,相关系数最大值分别为-482、-0.624和-0.499。结论]未来试点年平均气温有升高的趋势,这将会在一定程度上抑制杉木的径向生长,而选择对温度响应不太敏感的湖南江华、广西博白和广西资源种源在试验林所在区域进行造林,将是解决这一问题的有效途径。

Response to Annual Value of Temperature and Humidity for Tree Ring Width of Cunninghamia lanceolata Provenance Trial Stand in Liuzhou,Guangxi

Objective] ect the provenances adaptive to future''s climate change.Method] The different responses of tree ring width of fifty-two provenances to climate were studied by the method of dendroclimatology.Result] It indicated that the response of the whole tree ring width, earlywood width and latewood width to mean annual temperature was obvious, the maximum correlation coefficients are -0.515, -0.590 and -0.451 respectively. The response of the whole tree ring width, earlywood width and latewood width to the maximum annual temperature was also obvious. The maximum correlation coefficients are -0.482, -0.624 and -0.499 respectively.Conclusion] In recent years, there is an increasing trend of mean annual temperature of test plot, which will be unfavorable to tree growth to a certain extent. It will be an effective way to solve this problem to select appropriate provenance in the process of afforestation.