立地条件对长白落叶松人工林单木径向生长-干旱关系的调节效应

李瑞蓉; 王姿澄; 陈冠谋; 朱万才; 董灵波

doi:10.12302/j.issn.1000-2006.202501009

李瑞蓉, 王姿澄, 陈冠谋, 朱万才, 董灵波

南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (1) : 214-222.

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南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (1) : 214-222. DOI: 10.12302/j.issn.1000-2006.202501009

研究论文

立地条件对长白落叶松人工林单木径向生长-干旱关系的调节效应

李瑞蓉 ¹ ,
王姿澄 ¹ ,
陈冠谋 ¹ ,
朱万才 ² ,
董灵波 ¹^,^*

作者信息 +

Moderating effect of site conditions on radial growth-drought relationship of individual-tree in Larix olgensis

Author information +

文章历史 +

摘要

【目的】量化立地条件对长白落叶松人工林单木径向生长-干旱关系的调节作用,为气候变化背景下长白落叶松人工林的科学经营提供支撑。【方法】以黑龙江省哈尔滨市宾县胜利林场36块长白落叶松人工林为对象,采用立地指数(SI)将各样地划分为3个等级,即好立地(SI≥20.0 m)7块、中等立地(17.0 m ≤SI<20.0 m)14块、差立地(SI<17.0 m)15块;采用树木年轮学方法以及抵抗力、恢复力和弹性力3个指标量化和评估不同立地条件对长白落叶松单木径向生长-干旱关系的调节作用。【结果】标准化降水蒸散发指数(SPEI)共识别到4次中等程度的干旱事件;限制长白落叶松径向生长的主要气候因子在不同立地等级间存在一定差异,其中总体组主要气候因子为非生长季降水量和SPEI,立地差组为非生长季月均最低温、降水量和SPEI,立地中等组为非生长季降水量和SPEI,而好立地组为非生长季月均最高温、降水量和SPEI;不同立地条件下的长白落叶松在抵抗力、恢复力和弹性力方面的差异不同,抵抗力表现为好立地>中等立地>差立地,而恢复力和弹性力则表现出相反趋势;随着干旱年份的延续,不同立地长白落叶松的抵抗力显著提高,恢复力呈先上升后下降变化趋势,整体趋势表现为显著降低,弹性力则整体呈现上升趋势,与抵抗力的结果一致,与恢复力的结果相反。【结论】非生长季降水以及SPEI是限制长白落叶松生长的主要因素,但立地条件对径向生长与中度干旱之间的调节效应不显著,而对其他干旱等级和干旱持续时间下的径向生长-干旱间的调节效应是否显著,仍有待于进一步研究。

Abstract

【Objective】 This study aims to quantify the regulatory effects of site conditions on the tree-ring radial growth-drought relationship in Larix olgensis plantations, providing scientific support for sustainable forest management under climate change.【Method】We investigated 36 L. olgensis plantation plots in Shengli Forest Farm, Bin County, Harbin City, Heilongjiang Province. The plots were classified into three site quality grades using the site index (SI): good site conditions (SI≥20.0 m, 7 plots), medium site conditions (17.0 m≤SI<20.0 m, 14 plots), and poor site conditions (SI<17.0 m, 15 plots). Dendrochronological methods combined with three drought response indices (resistance, recovery, and resilience) were employed to evaluate how site conditions modulate the growth-drought relationship.【Result】The standardized precipitation evapotranspiration index (SPEI) identified four moderate drought events with an average duration of 1.25 years. Growth-limiting climatic factors varied across site condition grades: for overall group, non-growing season precipitation and SPEI were the primary limiting factors; poor site condition was constrained by monthly minimum temperature, precipitation and SPEI during the non-growing season; medium site condition by non-growing season precipitation and SPEI; while good site condition was mainly affected by monthly maximum temperature, precipitation and SPEI in the non-growing season. The differences in resistance, recovery of L. olgensis under different site conditions were different, and the resistance and resilience showed a comparative pattern: good site condition > medium site condition > poor site condition, while the recovery and resilience showed an opposite trend. With the continuation of drought years, the resistance of L. olgensis in different site conditions increased significantly, the trend of recovery increased first and then decreased, the overall trend showed a significant decrease, and the resilience showed an overall upward trend, which was consistent with the results of resistance and contrary to the results of recovery. 【Conclusion】Non-growing season precipitation and SPEI were identified as the primary limiting factors for L. olgensis growth. However, site conditions showed no significant moderating effect on the relationship between radial growth and moderate drought events. Further research is needed to determine whether site conditions significantly regulate radial growth-drought relationships under different drought severity levels and durations.

导出引用

李瑞蓉, 王姿澄, 陈冠谋, 等. 立地条件对长白落叶松人工林单木径向生长-干旱关系的调节效应[J]. 南京林业大学学报（自然科学版）. 2026, 50(1): 214-222 https://doi.org/10.12302/j.issn.1000-2006.202501009

LI Ruirong, WANG Zicheng, CHEN Guanmou, et al. Moderating effect of site conditions on radial growth-drought relationship of individual-tree in Larix olgensis[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2026, 50(1): 214-222 https://doi.org/10.12302/j.issn.1000-2006.202501009

中图分类号： S753

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