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- Title
不同树龄雪岭云杉径向生长变化特征与 模拟研究.
- Authors
侯天皓; 姜盛夏; 王勇辉; 张同文; 喻树龙; 王兆鹏; 郭 冬; 如先古丽·阿不都热合曼; 宋京徽
- Abstract
[Objective] In this study, we developed two tree-ring chronologies using samples of Schrenk spruce (Picea schrenkiana) that were collected from the upper and lower treeline in the middle of the northern slope of Tianshan Mountains, and analyzed the radial growth characteristics of trees. [Method] According to the tree ages, the lower treeline spruce was divided into young, middle-aged and old groups. The ARIMA model was established to simulate the radial growth of spruce at different ages based on basal area increment. [Results] The analysis results showed that the tree-ring width chronology of the lower treeline contains more climate information comparing with the upper treeline. Among the BAI changes of three tree age groups simulated by the ARIMA model, the model fitting the middle aged trees performed the best (R2 = 0.832). Considering the ARIMA model is modeled based on the univariate self-change trend, we analyzed the radial growth trend before and after the climate change, and found that the BAI of young spruce increased significantly overall, but the growth rate slowed down gradually. [Conclusion] The radial growth of middle-aged and old spruce showed a decreasing trend before the abrupt change of temperature. But after the abrupt change of temperature, the BAI of middle-aged spruce tends to be stable and the BAI of old spruce changes from a decreasing trend to an increasing trend.
- Subjects
BOX-Jenkins forecasting; TREE age; TREE growth; TIMBERLINE; AGE groups; SPRUCE
- Publication
Forest Research, 2023, Vol 36, Issue 3, p11
- ISSN
1001-1498
- Publication type
Article
- DOI
10.12403/j.1001-1498.20220616