Assessing the characteristics and limiting factors of tree growth is of practical significance for environmental studies and climatic reconstruction, especially in climate transition zones. In this study, four sites of Pinus armandii Franeh are investigated to understand regional climate-tree growth response in Mt. Yao, central China. Based on the high similarity of four residual chronologies and high correlations between chronologies and climatic factors, we analyzed the correlations of regional residual chronology with monthly climatic factors and the self-calibrating Palmer Drought Severity Index (scPDSI) from 1961–2016. The results indicate that the hydrothermal combination of prior August and current May and the scPDSI in May are main limiting factors of regional tree growth in Mt. Yao. The results of stepwise regression models also show that temperature and scPDSI in May are the main limiting factors of tree growth, but the limiting effect of scPDSI is more than temperature in this month. Through the analysis of the number of tree growth years corresponding to high temperature and high scPDSI, it was further confirmed that scPDSI in May is the main limiting factor on the growth of P. armandii in Mt. Yao. However, the influence of scPDSI in May has weakened, while temperature in May has increasingly significant influence on tree growth. The above findings will help improve our understanding of forest dynamics in central China under global climate change.

中文翻译：

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使用两种统计方法对华山松对气候的适应性进行基于树轮的评估。1961-2016 年，华中姚

评估树木生长的特征和限制因素对于环境研究和气候重建，特别是在气候过渡带中具有现实意义。在本研究中，华山松的四个地点Franeh 被调查以了解 Mt. 的区域气候 - 树木生长反应。姚，华中。基于4个残差年表的高度相似性和年表与气候因子之间的高度相关性，我们分析了1961-2016年区域残差年表与月气候因子和自校准帕尔默干旱强度指数（scPDSI）的相关性。结果表明，前 8 月和当前 5 月的热液组合和 5 月的 scPDSI 是山地区域树木生长的主要限制因素。姚。逐步回归模型的结果也表明，5月份温度和scPDSI是树木生长的主要限制因素，但本月scPDSI的限制作用大于温度。P. armandii在 Mt. 姚。然而，5月份scPDSI的影响已经减弱，而5月份气温对树木生长的影响越来越显着。上述发现将有助于提高我们对全球气候变化下华中地区森林动态的认识。