Resin tapping could affect water and nutrient transport processes in Chinese pine trees, rendering them more vulnerable to extreme climatic events, such as drought, and affecting the ecological function of forests in semi-arid regions. This study evaluated how resin tapping affects the tree-ring growth and climate sensitivity of Chinese pine in the Loess Plateau. We compared tree-ring growth patterns between the tapped and untapped faces of tapped trees, and investigated tree-ring growth and its response to climate between tapped and untapped trees in a forest stand during the 1967–2017 period. Tapped trees showed asymmetrical growth patterns after resin tapping, with narrower rings near the tapped face and wider ones near the untapped face. Furthermore, tapped trees had inter-annual variations consistent with those of untapped trees except for the years 2000 and 2001, with significantly lower values following resin tapping, and tree-ring growth then returning to normal. The climate response analysis indicated that the tree-ring growth of both tapped and untapped trees was negatively affected by monthly mean temperatures during the early growing season (May to July) in the post-resin-tapping period. Furthermore, tree-ring growth in tapped trees also revealed significant correlation with water vapour deficit and the Palmer drought index, which indicates that tapped trees are more vulnerable to drought. Further studies based on stable isotopes (i.e. δ¹³C, δ¹⁸O, and δ¹⁵N) could improve our understanding of the physiological mechanisms that regulate the effects of resin tapping on tree-ring growth.

树脂出土可能会影响松树的水分和养分传输过程，使它们更容易受到极端气候事件（如干旱）的影响，并影响半干旱地区森林的生态功能。这项研究评估了树脂开挖如何影响黄土高原油松的年轮生长和气候敏感性。我们比较了树木砍伐和未砍伐的树木之间树木年轮的生长方式，并调查了1967-2017年林分之间树木砍伐和未砍伐树木的树木年轮生长及其对气候的响应。轻敲树脂后，轻trees树显示出不对称的生长模式，轻face面附近的环较窄，未轻apped面附近的环较宽。此外，砍伐树木的年际变化与未砍伐树木的年变化一致，但2000年和2001年除外，在用树脂攻丝后，树木的年伐值显着降低，树木年轮长大后恢复正常。气候响应分析表明，在树脂采挖后的早期生长季节（5月至7月），采伐和未采伐的树木的树木年轮生长受到月平均温度的负面影响。此外，砍伐树木的年轮增长也显示出与水汽亏缺和帕尔默干旱指数的显着相关性，这表明砍伐树木更容易受到干旱的影响。基于稳定同位素（即δ）的进一步研究 气候响应分析表明，在树脂采挖后的早期生长季节（5月至7月），采伐和未采伐的树木的树木年轮生长受到月平均温度的负面影响。此外，砍伐树木的年轮增长也显示出与水汽亏缺和帕尔默干旱指数的显着相关性，这表明砍伐树木更容易受到干旱的影响。基于稳定同位素（即δ）的进一步研究 气候响应分析表明，在树脂采挖后的早期生长季节（5月至7月），采伐和未采伐的树木的树木年轮生长受到月平均温度的负面影响。此外，砍伐树木的年轮增长也显示出与水汽亏缺和帕尔默干旱指数的显着相关性，这表明砍伐树木更容易受到干旱的影响。基于稳定同位素（即δ）的进一步研究 这表明砍伐的树木更容易受到干旱的影响。基于稳定同位素（即δ）的进一步研究 这表明砍伐的树木更容易受到干旱的影响。基于稳定同位素（即δ）的进一步研究¹³ C，δ ¹⁸ O，和δ ¹⁵ N）可以提高我们的调节树脂的轻敲年轮生长的影响的生理机制的理解。