河北塞罕坝樟子松径向生长动态变化及其与气象因子的关系

doi:10.17521/cjpe.2019.0340

植物生态学报 ›› 2020, Vol. 44 ›› Issue (3): 257-265.DOI: 10.17521/cjpe.2019.0340

河北塞罕坝樟子松径向生长动态变化及其与气象因子的关系

季倩雯^1,²,郑成洋^1,^2,^3,^*(),张磊⁴,曾发旭^1,³

¹北京大学生态研究中心, 北京 100871
²北京大学城市与环境学院地表过程与模拟教育部重点实验室, 北京 100871
³北京大学生态与环境观测系统塞罕坝实验站, 河北承德 068466
⁴河北省塞罕坝机械林场, 河北承德 068466

收稿日期:2019-12-06 接受日期:2020-02-01 出版日期:2020-03-20 发布日期:2020-04-30
通讯作者: 郑成洋
基金资助:
国家重点研发计划(2017YFC0503903);国家自然科学基金(31621091)

Stem radial growth dynamics of Pinus sylvestris var. mongolica and their relationship with meteorological factor in Saihanba, Hebei, China

JI Qian-Wen^1,²,ZHENG Cheng-Yang^1,^2,^3,^*(),ZHANG Lei⁴,ZENG Fa-Xu^1,³

¹Institute of Ecology, Peking University, Beijing 100871, China
²Key Laboratory of Surface Processes and Simulation, Ministry of Education, College of Urban and Environmental Science, Peking University, Beijing 100871, China
³Saihanba Station, Peking University Observatory System for Ecology and the Environment, Chengde, Hebei 068466, China
⁴Saihanba Machinery Forestry Centre, Chengde, Hebei 068466, China

Received:2019-12-06 Accepted:2020-02-01 Online:2020-03-20 Published:2020-04-30
Contact: Cheng-Yang ZHENG
Supported by:
National Key R&D Program of China(2017YFC0503903);Natural Science Foundation of China(31621091)

摘要/Abstract

摘要：

树木是森林生态系统的基本组成, 其生长受气象因子的影响, 基于此, 该研究通过监测樟子松(Pinus sylvestris var. mongolica)的径向生长, 研究樟子松生长日动态规律、季节动态规律及其与气象因子的关系, 探讨河北塞罕坝地区樟子松森林生态系统对气候变化的响应机制。此外, 以往研究树木生长大多数基于树轮年代学, 缺少短期树木径向生长动态的研究。该研究利用径向生长记录仪监测河北塞罕坝机械林场内樟子松连续3年(2016-2018)的树干径向动态变化。结果表明: 由于树干的水分吸收与蒸腾作用, 樟子松树干径向昼夜变化呈现季节性规律, 可划分为4个阶段: 春季萌动期、夏季生长期、秋冬交替期和冬季休眠期。塞罕坝樟子松树干径向生长开始于每年4月初; 4月初至5月中旬为水分恢复阶段; 5月中旬至7月中旬为快速生长阶段; 7月中旬至10月中旬为缓慢生长阶段; 10月中、下旬生长趋于停止, 并有树干径向收缩现象。以一天为时间尺度, 在快速生长阶段(5月初至7月中旬)樟子松径向生长主要受空气温度的影响; 缓慢生长阶段(7月中旬至10月下旬)降水量、空气温度均影响樟子松径向生长。以15天为时间尺度, 温度对樟子松径向生长的影响显著。结果显示樟子松的生长动态规律及其影响因子, 为未来樟子松生理研究提供参考时间节点, 同时在极端低温与干旱的情况下, 为半干旱地区樟子松的生长状态提供参考依据。

关键词: 径向生长测量仪, 樟子松, 生长动态, 气象因子, 塞罕坝

Abstract:

Aims Trees are the basic components of forest ecosystems, and their growth is affected by meteorological factors. It is important to explore the response mechanism of forest ecosystems in this region to climate change if radial growth dynamics of dominant tree species and their relationship with meteorological factors are determined. Furthermore, previous studies on tree growth were mostly based on tree-ring chronology, whereas short- term studies on the stem radial growth dynamics of trees are scare. Therefore, this study aims to investigate the daily and seasonal dynamics of radial growth in Pinus sylvestris var. mongolica and its relationship with meteorological factors.
Methods In this study, dendrometer increment sensor was used to monitor the stem radial dynamic changes of P. sylvestris var. mongolica for three years from 2016 to 2018 in the Saihanba, Hebei Province, China.
Important findings Due to the water absorption and transpiration of the stems, the diurnal variation of the stem radial can be divided into four periods: spring germination period; summer growth period; autumn-winter alternating period; winter dormant period. Stem radial growth begins at early April in each year during water recovery from early April to mid-May. The fast-growing stage occurred from mid-May to mid-July. From mid-July to mid-October, trees entered a slow-growing stage. The radial growth tended to stop during mid- and late-October. Temperature was the main meteorological factor influencing the stem radial growth. On the time scale of one day, the stem radial growth was mainly affected by temperature during the rapid growth stage, but by rainfall and air temperature during slow growing stage. On the time scale of 15 days, only temperature had a significant effect on the stem radial growth. Under the conditions of extreme low temperature and drought, our results provide important reference for the growth status of P. sylvestris var. mongolica in semi-arid areas.

Key words: Dendrometer, Pinus sylvestris var. mongolica, growth dynamic, meteorological factor, Saihanba

季倩雯, 郑成洋, 张磊, 曾发旭. 河北塞罕坝樟子松径向生长动态变化及其与气象因子的关系. 植物生态学报, 2020, 44(3): 257-265. DOI: 10.17521/cjpe.2019.0340

JI Qian-Wen, ZHENG Cheng-Yang, ZHANG Lei, ZENG Fa-Xu. Stem radial growth dynamics of Pinus sylvestris var. mongolica and their relationship with meteorological factor in Saihanba, Hebei, China. Chinese Journal of Plant Ecology, 2020, 44(3): 257-265. DOI: 10.17521/cjpe.2019.0340

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2019.0340

https://www.plant-ecology.com/CN/Y2020/V44/I3/257

图/表 7

图1 河北塞罕坝月平均樟子松径向日变化动态。

Fig. 1 Diurnal change of monthly average radial variation of Pinus sylvestris var. mongolica in Saihanba, Hebei.

图2 3月20日-5月20日河北塞罕坝樟子松径向日动态变化。

Fig. 2 Diurnal change of stem radial growth in Pinus sylvestris var. mongolica from March 20 to May 20 in Saihanba, Hebei.

图3 9月20日-11月20日河北塞罕坝樟子松径向日动态变化。

Fig. 3 The diurnal change of stem radial growth in Pinus sylvestris var. mongolica from September 20 to November 20 in Saihanba, Hebei.

图4 2016-2018年河北塞罕坝樟子松年累积径向平均变化。

Fig. 4 The yearly accumulation of radial growth in Pinus sylvestris var. mongolica during 2016-2018 in Saihanba, Hebei.

图5 河北塞罕坝4-10月以15天为间隔的樟子松径向变化。斜线箱图表示径向生长量与0有显著差异(单样本t检验, p < 0.05)。

Fig. 5 Stem radial growth of Pinus sylvestris var. mongolica at 15 d interval from April to October in Saihanba, Hebei. Diagonal box shows that stem radial variation is significantly different from zero.

图6 河北塞罕坝樟子松径向变化与气象因子的关系。

Fig. 6 Dynamic relationship between radial variation and climatic factors of Pinus sylvestris var. mongolica in Saihanba, Hebei.

表1 河北塞罕坝快速生长阶段和稳定生长阶段樟子松径向变化量与气象因子的Pearson相关关系分析

Table 1 Pearson correlation analysis between the radial variation of Pinus sylvestris var. mongolica and the meteorological factors during fast growth and stable growth phases in Saihanba, Hebei

阶段 Phase	降水量 Precipitation	土壤温度 Soil temperature	空气温度 Air temperature	降水量 Precipitation (15 d)	空气温度 Air temperature (15 d)
生长 Growth	0.247	0.363^**	0.241	0.755	0.897^**
稳定 Stabilization	0.400^**	0.169	0.218^**	0.135	0.816

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河北塞罕坝樟子松径向生长动态变化及其与气象因子的关系

Stem radial growth dynamics of Pinus sylvestris var. mongolica and their relationship with meteorological factor in Saihanba, Hebei, China

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