云南化佛山高山栲年轮生长对气候要素的响应特征  

Tree Ring Growth Response of Castanopsis delavayi to Climate in the Huafo Mountain,Yunnan

作　　者：王奇 张春华 冯德枫 孙永玉[2] 刘建锋[1] Wang Qi;Zhang Chunhua;Feng Defeng;Sun Yongyu;Liu Jianfeng(Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China;Institute of Highland Forest Science,Chinese Academy of Forestry,Kunming 650233,China)

机构地区：[1]中国林业科学研究院林业研究所,国家林业和草原局林木培育重点实验室,北京100091 [2]中国林业科学研究院高原林业研究所,昆明650233

出　　处：《陆地生态系统与保护学报》2022年第4期86-93,共8页Terrestrial Ecosystem and Conservation

基　　金：中央级公益性科研院所基本科研业务费专项“栎类资源培育与利用关键技术研究”(CAFYBB2018ZB001)。

摘　　要：【目的】明确高山栲(Castanopsis delavayi)年轮生长状况及其主要限制因子,为更好地了解亚热带高山地区树木生长对气候变化的响应提供参考。【方法】以云南楚雄化佛山高山栲林为例,利用年轮生态学方法,分析了该地区高山栲年轮生长在1966—2019年时段对气候要素的响应特征。【结果】高山栲年轮生长分别与上年11月和当年夏季(5、7月)的降水量呈显著负相关;年轮生长与当年夏季(5—8月)的干旱指数负相关,进一步证实了降水过量对生长的限制作用;但年轮生长与上年10月气温明显负相关而与当年5—7月气温呈显著正相关。滑动相关分析表明,在研究时段内,高山栲年轮生长对生长季气温和降水量的响应强度呈现较为稳定的趋势。【结论】生长季过量降水可能是限制该区域高山栲年轮宽度生长的最主要气象要素,但尚需结合林分结构与立地条件状况展开进一步的定量研究。【Objective】Clarifying the tree ring growth of Castanopsis delavayi and its main limiting factors,which could provide reference for better understanding the response of tree growth to climate change in subtropical alpine region.【Method】In the present study,the response of the tree ring growth of C.delavayi to climatic variables during the period 1966-2019 in the Huafo Mountain,Chuxiong,Yunnan province,was analyzed by using the method of dendroecology.【Result】The ring width index(RWI)was significantly negatively correlated with the precipitation in previous November and the current summer(May and July).There was a significant negative correlation between the RWI and the drought index during the current summer(May-August),which further confirmed the restrictive effect of excessive precipitation on growth.The RWI was negatively correlated with the temperature in previous October,and positively correlated with the temperature in current summer(May-July).Results of the moving correlation analysis indicated that the response intensity of the tree ring growth of C.delavayi to the temperature and precipitation during the growing season showed a stable trend over the study period.【Conclusion】Excessive precipitation during the growing season may be the most important climatic factor restricting the tree ring growth of C.delavayi in this region,but further researches are required,by combining the studies on the stand structure and site conditions.

关 键 词：高山栲 年轮生长 气候变化 

分 类 号：S761.1[农业科学—森林保护学]