Response to Annual Value of Temperature and Humidity for Tree Ring Width of Cunninghamia lanceolata Provenance Trial Stand in Liuzhou,Guangxi
Objective]To select the provenances adaptive to future’s climate change.[Method]The different re-sponses of tree ring width of fifty-two provenances to climate were studied by the method of dendroclimatology.[Re-sult]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.[Con-clusion]In recent years,there is an increasing trend of mean annual temperature of test plot,which will be unfavor-able to tree growth to a certain extent.It will be an effective way to solve this problem to select appropriate prove-nance in the process of afforestation.