Seasonal Variation of Annual Radial Growth of

SHI Jianzhou; LIU Xiande; TIAN Qing; WAN Yanfang; ZHAO Weijun

doi:10.13870/j.cnki.stbcxb.2022.02.033

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Seasonal Variation of Annual Radial Growth of

更新时间：2024-11-07

- Seasonal Variation of Annual Radial Growth of
- Vol. 36, Issue 2, Pages: 261-267(2022)
- 作者机构：
  
  1. 甘肃农业大学林学院,兰州,730070
  2. 甘肃省祁连山水源涵养林研究院,甘肃,张掖,734000
  3. 中国林业科学研究院森林生态环境与保护研究所,北京,100091
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.02.033
  CLC： P942;S791.18
- Published：2022
- 稿件说明：
移动端阅览
SHI Jianzhou, LIU Xiande, TIAN Qing, et al. Seasonal Variation of Annual Radial Growth of[J]. 2022, 36(2): 261-267.
DOI：

SHI Jianzhou, LIU Xiande, TIAN Qing, et al. Seasonal Variation of Annual Radial Growth of[J]. 2022, 36(2): 261-267. DOI： 10.13870/j.cnki.stbcxb.2022.02.033.

摘要

以祁连山中段排露沟小流域青海云杉为研究对象

2018年5-10月应用带状树木径向生长记录仪对4株青海云杉径向生长过程进行测定

并同步测定气象因子和土壤温度、湿度

分析单株青海云杉径向生长的季节变化特征及其树木个体之间的差异

确定青海云杉在不同生长阶段的限制因子。结果表明:(1)4株青海云杉6月8日左右开始生长

7月28日左右结束生长

生长期约51天。(2)青海云杉径向生长季节变化特征在个体之间存在差异

胸径较小的树木(DBH=10.0 cm和11.0 cm)

生长启动晚

结束早

生长期短

年累积生长量少

而胸径较大的树木(DBH=18.3 cm和21.0 cm)正好相反

生长期长

年累积生长量多。(3)青海云杉径向生长具有明显的季节变化模式

分为3个阶段

分别为启动生长阶段(5-6月初)、快速生长阶段(6月初至7月末)和结束生长阶段(8-10月)

平均生长速率分别为0.35

12.99

0.54 μm/d。(4)青海云杉在不同的生长阶段限制因子不同

其中

启动生长阶段

降雨和土壤温度是限制生长的主要因子;快速生长阶段

降雨和土壤体积含水量是主要因子。因此

从整个生长季来看

土壤温度和水分是影响青海云杉年内径向生长的主要因子。

Abstract

Took Qinghai spruce (Picea crassifolia) in the small watershed of Pailugou in the central Qilian Mountains as the research object. From May to October 2018

the radial growth process of four strains of Qinghai spruce was measured using the belt tree radial growth recorder

and the meteorological factors were simultaneously measured. Based on the soil temperature and humidity

the seasonal variation characteristics of the radial growth of individual Qinghai spruce and the differences between trees were analyzed

and the limiting factors of Qinghai spruce in different growth stages were also determined. The results showed that:(1) The four Qinghai spruce plants began to grow on June 8 and ended on July 28

with a growth period of about 51 days. (2) The characteristics of the radial growth season of Qinghai spruce were different among individuals. The growth of trees with smaller DBH (DBH=10.0 cm and 11.0 cm) started later and ended earlier

resulting in the shorter growing period and less annual cumulative growth

while trees with larger DBH (DBH=18.3 cm and 21.0 cm) gave an opposite results

with a longer growing period and more annual cumulative growth. (3) The radial growth of Qinghai spruce had an obvious seasonal change pattern

which was divided into three stages:the initial growth stage (May to early June)

the rapid growth stage (early June to late July) and the end growth stage (August to October) with the average growth rates of 0.35 μm/d

12.99 μm/d and 0.54 μm/d respectively. (4) The limiting factors of Qinghai spruce growth were different among different growth stages:in the initial growth stage

rainfall and soil temperature were the main factors restricting growth

and during the rapid growth stage

rainfall and soil volumetric water content were the main factors. Therefore

from the perspective of the entire growing season

soil temperature and moisture were the main factors affecting the annual radial growth of Qinghai spruce.

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