| 摘要: |
| 沙地樟子松是我国三北防护林工程的主要推广树种，查明该树种核心区的树木生长的气候环境制约因子，有助于提升对全球变化不利影响的适应能力，为区域生态文明建设与可持续发展提供科学数据。通过对呼伦贝尔沙地樟子松保护区核心区树轮样本的研究，揭示森林内部该树种年轮记录的生长气候响应特征。结果表明：与标准年表相比，差值年表具有更好的气候要素表征能力。水分是核心区沙地樟子松径向生长的主要限制因子，差值年表与上年8月至当年7月降水总量显著相关（0.512，p < 0.01）。在过去的81年中极端湿润年和干旱年分别出现15次和11次。核心区沙地樟子松差值年表具有显著的2 — 8年的周期信号，空间相关显示差值年表有一定的区域水文气候变化代表性。 |
| 关键词: 生长-气候响应 樟子松 呼伦贝尔沙地 |
| DOI：10.7515/JEE182037 |
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| 基金项目:陕西省教育厅重点实验室科研计划项目（17JS005）；陕西省自然科学基础研究计划项目（2018JQ4022）；黄土与第四纪地质国家重点实验室开放基金项目（SKLLQG1711）；宝鸡文理学院重点项目（ZK2018047） |
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| Climatic responses of radial growth of Pinus sylvestris var. mongolica in the core area of Hulunbeier Sandy Land |
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BAO Guang, LIU Na
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1. Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, School of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, China
2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
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| Abstract: |
| Background, aim, and scope Pinus sylvestris var. mongolica is the main tree species of the Three-North Shelterbelt Project in China. The relationships between tree rings and climatic factors are helpful to serve the construction of regional ecological civilization. Materials and methods Through the study of the tree-ring samples in the core area of the Pinus sylvestris var. mongolica protected area in the Hulunbeier Sandy Land, the characteristics of the growth-climate response of the tree species in the forest were revealed. Results The residual chronology had better capability of reflecting climatic signal than the standard chronology did. Discussion Moisture was the main limiting factor for the radial growth of pines in the core area. The residual chronology was significantly correlated with the total precipitation from August of previous year to July of current year (0.512, p < 0.01). In the past 81 years, the extreme wet and the dry events appeared 15 years and 11 years, respectively. The chronology of the pines in the core area had a significant 2—8 year periodic signal, and the spatial correlation showed that the residual chronology showed a certain representation of regional hydrological climate change. Conclusions Pinus sylvestris var. mongolica had potential capability for hydrological study on regional scales. Recommendations and perspectives The climatic and environmental factors of tree growth in the core area were identified, which could improve the adaptive capacity of global change and its adversely affect. |
| Key words: growth-climatic response Pinus sylvestris var. mongolica Hulunbeier Sandy Land |
