庐山日本扁柏初次级生长季节动态对环境因子的响应

doi:10.3976/j.issn.1002-4026.20260023

摘要/Abstract

摘要： 为探究生态修复重要树种不同器官生长节律及其对环境因子的响应规律，使用树木径向变化记录仪与测尺连续监测庐山日本扁柏初、次级生长过程，采用Gompertz模型、广义加性模型拟合初、次级生长季节动态，并分析其与环境因子的关系。结果表明，日本扁柏初级生长动态呈单峰型，次级生长则呈双峰型。其中，次级生长物候期存在年际波动，2018年次级生长的开始、高峰和结束时间较2017年分别提前14天、27天、38天。两年间，次级生长的开始时间均早于初级生长，而结束时间却晚于初级生长。初级生长的开始对次级生长物候期存在促进作用，而高峰与结束则会抑制次级生长物候。初、次级生长均与土壤温度、最低气温呈负相关，与降水呈正相关。另外，土壤含水量的增加可促进初级生长，而饱和水汽压差的上升则会抑制次级生长。研究结果揭示了日本扁柏初级与次级生长季节动态的时间关联性及其对环境因子的差异化响应，为预测其不同器官生长对未来气候变化的响应及生态恢复方案的制定提供理论依据。

关键词: 日本扁柏, 初级生长, 径向生长, 环境因子, 亚热带

Abstract: To investigate the growth rhythms of different organs of an important tree species for ecological restoration and their responses to environmental factors, continuous monitoring of the primary and secondary growth processes of Chamaecyparis obtusa in Mount Lushan was conducted using dendrometers and measuring tapes. The Gompertz model and the generalized additive model were used to fit the seasonal dynamics of primary and secondary growth and to analyze their relationships with environmental factors. The results indicated that the dynamics of primary growth of C. obtusa exhibited a unimodal pattern, while secondary growth displayed a bimodal pattern. Notably, the phenological phases of secondary growth exhibited interannual variability, with the onset, peak, and conclusion of secondary growth occurring 14, 27, and 38 days earlier, respectively, in 2018 compared to 2017. Throughout the two years, the onset of secondary growth consistently preceded that of primary growth, while its conclusion occurred later than that of primary growth. The onset of primary growth promoted the phenology of secondary growth, whereas the peak and conclusion of primary growth inhibited it. Primary and secondary growth were negatively correlated with soil temperature and minimum temperature and positively correlated with precipitation. In addition, increased soil moisture facilitated primary growth, whereas a higher vapor pressure deficit inhibited secondary growth. The findings reveal the temporal linkage between the seasonal dynamics of primary and secondary growth in C. obtusa and their differential responses to environmental factors, providing a theoretical basis for predicting the responses of different organs to future climate change and for formulating ecological restoration strategies.

Key words: Chamaecyparis obtusa; primary growth, stem radial growth, environmental factors, subtropics

中图分类号:

S791.42

张文鹏, 符迪娜, 汪阳, 张婧文, 高嘉乐, 刘新圣. 庐山日本扁柏初次级生长季节动态对环境因子的响应[J]. 山东科学, 0, (): 1-.

ZHANG Wenpeng, FU Dina, WANG Yang, ZHANG Jingwen, Gao Jiale, LIU Xinsheng . The response of the seasonal dynamics of primary and secondary growth of Chamaecyparis obtusa in Lushan Mount to environmental factors[J]. Shandong Science, 0, (): 1-.

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