心材腐烂对色季拉山急尖长苞冷杉径向生长的影响

doi:10.13287/j.1001-9332.202411.006

应用生态学报 ›› 2024, Vol. 35 ›› Issue (11): 2951-2958.doi: 10.13287/j.1001-9332.202411.006

心材腐烂对色季拉山急尖长苞冷杉径向生长的影响

张一博^1,2,3,4, 郭亮娜^1,2,3,4, 李江荣^1,2,3,4*, 张波^1,2,3,4, 朱思洁^1,2,3,4, 陈刚刚^1,2,3,4

¹西藏农牧学院高原生态研究所, 西藏林芝 860000;
²西藏农牧学院西藏高原森林生态教育部重点实验室, 西藏林芝 860000;
³西藏林芝高山森林生态系统国家野外科学观测研究站, 西藏林芝 860000;
⁴西藏自治区高寒植被生态安全重点实验室, 西藏林芝 860000

收稿日期:2024-06-03 修回日期:2024-08-27 出版日期:2024-11-18 发布日期:2025-05-18
通讯作者: *E-mail: ljrong06@xza.edu.cn
作者简介:张一博, 男, 2000年生, 硕士研究生。主要从事森林生态学研究。E-mail: 2963370951@qq.com
基金资助:
西藏自治区自然科学基金项目(XZ202301JD0001G)和林芝市科技计划项目(SYQ2024-14)资助。

Impacts of heartwood decay on radial growth of Abies georgei var. smithii in Sygera Mountains, China.

ZHANG Yibo^1,2,3,4, GUO Liangna^1,2,3,4, LI Jiangrong^1,2,3,4*, ZHANG Bo^1,2,3,4, ZHU Sijie^1,2,3,4, CHEN Ganggang^1,2,3,4

¹Institute of Tibet Plateau Ecology, Xizang Agricultural and Animal Husbandry University, Nyingchi 860000, Xizang, China;
²Key Laboratory of Forest Ecology in Tibet Plateau, Ministry of Education, Xizang Agricultural and Animal Husbandry University, Nyingchi 860000, Xizang, China;
³National Forest Ecosystem Observation & Research Station of Nyingchi Prefecture of Xizang, Nyingchi 860000, Xizang, China;
⁴Key Laboratory of Alpine Vegetation Ecological Security in Xizang, Nyingchi 860000, Xizang, China

Received:2024-06-03 Revised:2024-08-27 Online:2024-11-18 Published:2025-05-18

摘要/Abstract

摘要： 树木心腐现象在森林生态系统中广泛存在,对森林健康生长具有潜在影响,也对森林碳汇功能的估算带来了不确定性。然而,目前关于心腐现象对树木径向生长的影响特征还缺乏认识。本研究以藏东南地区色季拉山急尖长苞冷杉为对象,利用海拔3700 m(低海拔)、4000 m(中海拔)和4300 m(高海拔)的心腐和健康急尖长苞冷杉的树木年轮数据,比较二者的径向生长及其与气候要素的关系。结果表明: 快速升温对中、高海拔区域心腐急尖长苞冷杉径向生长的促进作用低于健康急尖长苞冷杉,而对低海拔心腐急尖长苞冷杉生长抑制作用高于健康急尖长苞冷杉,在升温前后2个时段内3个海拔的心腐急尖长苞冷杉径向生长速率均显著低于健康急尖长苞冷杉。相关性分析表明,心腐后温度对低海拔区域急尖长苞冷杉的径向生长由促进作用转为一定的抑制作用,中海拔区域的心腐急尖长苞冷杉对于前一年生长季温度因子的敏感度低于健康急尖长苞冷杉,而林线区域的心腐急尖长苞冷杉对温度的响应敏感性与健康急尖长苞冷杉差异较小。在未来气候变暖的背景下,升温对区域内急尖长苞冷杉的径向生长存在促进作用,心腐急尖长苞冷杉和健康急尖长苞冷杉径向生长速率的差异可能进一步扩大。

关键词: 急尖长苞冷杉, 心材腐烂, 径向生长, 树木年轮, 气候变化

Abstract: Tree heart rot is widespread in forests, which could affect forest health and bring uncertainties in the estimation of forest carbon sequestration. However, the impacts of heart rot on radial growth of trees are not well understood. Tree-ring data from heart-rotted and healthy trees of Abies georgei var. smithii at altitudes of 3700 m (low-altitude), 4000 m (mid-altitude), and 4300 m (high-altitude) in the Sygera Mountain region of southeastern Xizang were used to compare radial growth and its relationship with climatic factors. The results showed that the positive effect of rapid warming on the radial growth of heart-rotted A. georgei var. smithii in mid- and high-altitude regions was lower than that of healthy trees, while the negative effect on the growth of low-altitude heart-rotted trees was higher than that on healthy trees. In both periods before and after warming, the radial growth rates of heart-rotted trees at all three altitudes were significantly lower than those of healthy ones. With the occurrence of heart rot, the effect of temperature on the radial growth of low-altitude A. georgei var. smithii shifted from promotion to some degree of inhibition. The sensitivity of heart-rotted trees in mid-altitude regions to temperature factors during the previous year’s growing season was lower than that of healthy trees, while the sensitivity of heart-rotted trees in the treeline area to temperature was only slightly different from that of healthy trees. Under the background of future climate warming, warming would promote the radial growth of A. georgei var. smithii in the region, and exacerbate the differences in growth rates between heart-rotted and healthy trees.

Key words: Abies georgei var. smithii, heartwood decay, radial growth, tree ring, climate change

张一博, 郭亮娜, 李江荣, 张波, 朱思洁, 陈刚刚. 心材腐烂对色季拉山急尖长苞冷杉径向生长的影响[J]. 应用生态学报, 2024, 35(11): 2951-2958.

ZHANG Yibo, GUO Liangna, LI Jiangrong, ZHANG Bo, ZHU Sijie, CHEN Ganggang. Impacts of heartwood decay on radial growth of Abies georgei var. smithii in Sygera Mountains, China.[J]. Chinese Journal of Applied Ecology, 2024, 35(11): 2951-2958.

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心材腐烂对色季拉山急尖长苞冷杉径向生长的影响

Impacts of heartwood decay on radial growth of Abies georgei var. smithii in Sygera Mountains, China.

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