摘要
油松(Pinus tabulaeformis)是中国特有且广泛分布的针叶树种,也是中国北方地区的主要造林树种。气候变化对油松生长的影响是种群生态学研究的热点。基于油松树木年轮学文献成果,系统梳理分析了不同降水、气温等因素影响下中国北方地区油松径向生长特征,试图明晰其区域分异特征,以期为油松天然林和人工林管理提供理论和决策依据。结果表明:(1)在年降水量低于400 mm的区域,限制油松径向生长的主要因素是生长季降水;在年降水量400~600 mm的区域,生长季的水热因素共同影响油松的径向生长;在年降水量高于600 mm区域,油松的径向生长主要受5月降水与平均气温及其共同作用的干旱胁迫影响。(2)上年降水对油松径向生长的“滞后效应”主要体现在年降水量低于600 mm和年均气温低于9℃的区域。(3)冬季气温对年降水量高于600 mm和年均气温高于9℃区域油松的生长起促进作用,对年降水量低于600 mm和年均气温低于9℃的区域起抑制作用。在全球气候变暖背景下,油松分布区将面临从干旱半干旱区向相对湿润区、从低海拔向高海拔移动的趋势。
Pinus tabulaeformis,an endemic and widely distributed conifer in China,is widely distributed conifer species in China,and it is also the main afforestation species in the northern region of China.The impact of climate change on the growth of P.tabuliformis has become a hot research topic of genecology.In this study,based on the results of research on the chronology of P.tabuliformis,we systematically sorted out and analyzed the characteristics of the response of its radial growth to climatic factors under the influence of different precipitation,temperature,and other factors in the northern region of China.Our aim was to clarify the regional differentiation characteristics and provide a theoretical and decision-making basis for the management of natural and planted forests of P.tabuliformis.The results showed the following:(1)The main factor limiting the radial growth of P.tabuliformis is precipitation during the growing season.In regions with annual precipitation lower than 400 mm,hydrothermal factors in the growing season mainly influence the radial growth.In regions with annual precipitation of 400-600 mm,the radial growth of P.tabuliformis is mainly limited by temperature and precipitation.In regions with annual precipitation higher than 600 mm,the radial growth of P.tabuliformis is mainly affected by May precipitation and temperature and their combined effect of drought stress(2)The“lagging effect”of precipitation(e.g.,the previous precipitation of September)on the radial growth of P.tabuliformis is a significant factor,and it is mainly observed in regions with annual precipitation lower than 600 mm and annual mean temperatures below 9℃.(3)Winter temperature promotes the growth of P.tabuliformis in regions with annual precipitation higher than 600 mm and annual mean temperatures higher than 9℃.However,it inhibits the growth in regions with annual precipitation lower than 600 mm and annual mean temperatures lower than 9℃.Under the climatic background of global warming,the distribution of P.tabulifor
作者
苏靖茸
肖生春
彭小梅
车存伟
赵鹏
Su Jingrong;Xiao Shengchun;Peng Xiaomei;Che Cunwei;Zhao Peng(Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China;School of Computer Science,Huainan Normal University,Huainan 232038,Anhui,China)
出处
《中国沙漠》
CSCD
北大核心
2024年第5期60-72,共13页
Journal of Desert Research
基金
国家自然科学基金项目(41977419,42171031)
内蒙古自治区科技成果转化专项(2021CG0046)
阿拉善盟科技计划项目(AMYY 2021-19)。
关键词
油松
径向生长
气候响应
区域分异特征
Pinus tabulaeformis
radial growth
climate response
regional differentiation
