ABSTRACT Compared with traditional research methods, research based on physiological processes could provide more interactions between the radial growth of trees and climate factors. The Vaganov–Shashkin model (VS-oscilloscope) was applied to simulate tree-ring formation in semi-arid eastern Gansu, China and its response to climate variables during the past several decades. Three simulated tree-ring width series are significantly correlated to the corresponding measured tree-ring chronologies during their common periods (p < 0.001). The growth rate due to soil moisture dominates the radial growth of trees in the main growing season, and growth rate due to temperature limits tree growth at the start and end of the growing season. Simulation results show that soil moisture significantly affects tree-ring width in extremely wide and narrow rings years (p < 0.01). Correlation analysis between measured tree-ring chronologies and monthly climate data and divided periods simulation results show that the limiting effect of soil moisture on the radial growth of Pinus tabulaeformis under warm and dry conditions is significantly enhanced. Our results provide useful knowledge for improving the protection of forests in ecologically fragile areas and mitigating the adverse effects of warmer climate in the future.

中文翻译：

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基于Vaganov-Shashkin模型的甘肃东部、西北地区油松径向生​​长气候因子

摘要 与传统的研究方法相比，基于生理过程的研究可以提供更多的树木径向生长与气候因素之间的相互作用。应用Vaganov-Shashkin模型（VS-oscilloscope）模拟甘肃东部半干旱地区过去几十年树木年轮的形成及其对气候变量的响应。三个模拟的年轮宽度系列在其共同时期与相应的测量年轮年表显着相关（p < 0.001）。土壤水分引起的生长速度在主要生长季节支配树木的径向生长，而温度引起的生长速度限制了生长季节开始和结束时的树木生长。模拟结果表明，在极宽年和极窄年，土壤水分对树木年轮宽度的影响显着（p < 0.01）。实测树木年轮年表与月气候资料及分期模拟结果的相关性分析表明，暖干条件下土壤水分对油松径向生​​长的限制作用显着增强。我们的研究结果为改善生态脆弱地区的森林保护和减轻未来气候变暖的不利影响提供了有用的知识。实测树木年轮年表与月气候资料及分期模拟结果的相关性分析表明，暖干条件下土壤水分对油松径向生​​长的限制作用显着增强。我们的研究结果为改善生态脆弱地区的森林保护和减轻未来气候变暖的不利影响提供了有用的知识。实测树木年轮年表与月气候资料及分期模拟结果的相关性分析表明，暖干条件下土壤水分对油松径向生​​长的限制作用显着增强。我们的研究结果为改善生态脆弱地区的森林保护和减轻未来气候变暖的不利影响提供了有用的知识。