科尔沁沙地南部辽西地区人工林油松气候响应的树轮研究  

Tree-ring study on the climate response of planted Pinus tabuliformis in the western Liaoning Province of southern Horqin sandy land

作　　者：闫俊奇 包光[1,2] 刘娜[1,2] 包明 YAN Jun-qi;BAO Guang;LIU Na;BAO Ming(Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province,College of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,Shaanxi,China;State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,Shaanxi,China;The Fifth Middle School of Dalian Economic and Technological Development Zone,Dalian 116630,Liaoning,China)

机构地区：[1]陕西省灾害监测与机理模拟重点实验室,宝鸡文理学院地理与环境学院,陕西宝鸡721013 [2]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710061 [3]大连经济技术开发区第五中学,辽宁大连116630

出　　处：《宝鸡文理学院学报(自然科学版)》2024年第4期83-88,共6页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：陕西省高层次人才特殊支持计划区域科技创新人才项目(2022);黄土与第四纪地质国家重点实验室开放基金(SKLLQG2109,2031);陕西省普通高校第二批青年杰出人才支持计划(2018)。

摘　　要：目的通过树木径向生长变化探讨科尔沁沙地南部辽西地区人工林油松的气候响应特征。方法利用树木年轮学方法建立符合气候学研究的树轮宽度年表,使用相关分析方法确定年轮指数序列与气候因子的响应关系。结果建立了2组树轮宽度年表,时间跨度为1978-2014年。2组树轮年表均与当年5月降水显著正相关,与5月平均温度显著负相关;同时年表与8月平均相对湿度显著正相关,表明影响油松生长的重要限制因素是生长季(5月和8月)的湿度条件。2组年表共同确定的极端低生长指数年反映了2000-2003年间严重的区域性气候干旱事件。结论北方农牧交错带科尔沁沙地南部辽西地区人工林油松存在显著的气候限制因子,在未来持续变暖的背景下,研究区域人工林油松面临着水分不足的生长压力。Purposes—To investigate climate response characteristics of Pinus tabuliformis planted in the southern part of Horqin Sandy Land in the western Liaoning Province through the changes of tree radial growth.Methods—Dendrochronology was used to establish the tree-ring width chronology,and correlation analysis was utilized to identify the response relationship between the ring-width index series and climate factors.Results—Two tree-ring width chronologies were established,with the time span from 1978 to 2014.Both chronologies were positively correlated with precipitation in May,and negatively correlated with average temperature in May of the present year.At the same time,there was a significant positive correlation between the chronology and the average relative humidity in August.Such correlations indicate that the humidity conditions in May and August of the growing season were an important limiting factor affecting the growth of Pinus tabulaeformis.The extremely low growth index years identified by both tree-ring width chronologies reflect the severe regional climatic drought events from 2000 to 2003.Conclusions—Significant climate limiting factors exist in the plantation of Pinus tabulaeformis in the southern part of the Horqin Sandy Land in the agro-pastoral ecotone in northern China.Under the background of continuous warming in the future,Pinus tabuliformis planted in the study area will suffer the growth pressure of insufficient water.

关 键 词：人工林油松 树轮生长响应 辽西地区 北方农牧交错带 科尔沁沙地 

分 类 号：P467[天文地球—大气科学及气象学]