水热耦合对沈阳地区油松木质部生长的影响

doi:10.13287/j.1001-9332.202110.036

应用生态学报 ›› 2021, Vol. 32 ›› Issue (10): 3468-3476.doi: 10.13287/j.1001-9332.202110.036

水热耦合对沈阳地区油松木质部生长的影响

刘伟韬^1,2, 李俊霞^1,3, 赵莹¹, 韩勍¹, 侯森¹, 张敬远¹, 李丰¹, 陈振举^1,4,5*

¹沈阳农业大学林学院, 树木年轮实验室, 沈阳 110866;
²北京林业大学林学院, 北京 100083;
³沈阳农业大学园艺学院, 沈阳 110866;
⁴中国科学院清原森林生态系统观测研究站, 沈阳 110164;
⁵中国科学院沙漠与沙漠化重点实验室, 兰州 730000

收稿日期:2021-07-13 修回日期:2021-08-27 出版日期:2021-10-15 发布日期:2022-04-15
通讯作者: * E-mail: chenzhenju@syau.edu.cn
作者简介:刘伟韬, 男, 1999年生, 硕士研究生。主要从事油松生长与气候关系的细胞尺度研究。E-mail: 1095362871@qq.com
基金资助:
国家自然科学基金项目(41871027,41888101,31570632)资助

Effects of moisture and heat coupling on xylem growth of Pinus tabuliformis in Shenyang, China

LIU Wei-tao^1,2, LI Jun-xia^1,3, ZHAO Ying¹, HAN Qing¹, HOU Sen¹, ZHANG Jing-yuan¹, LI Feng¹, CHEN Zhen-ju^1,4,5*

¹Tree-Ring Laboratory, College of Forestry, Shenyang Agricultural University, Shenyang 110866, China;
²College of Forestry, Beijing Forestry University, Beijing 100083, China;
³College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China;
⁴Qingyuan Forest CERN, Chinese Academy of Sciences, Shenyang 110164, China;
⁵Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2021-07-13 Revised:2021-08-27 Online:2021-10-15 Published:2022-04-15
Contact: * E-mail: chenzhenju@syau.edu.cn
Supported by:
National Natural Science Foundation of China (41871027, 41888101, 31570632).

摘要/Abstract

摘要： 利用微树芯技术可以从细胞尺度研究树木形成层物候和径向生长的过程,揭示树木生长与气候的关系。油松是我国北方森林的建群树种之一,也是沈阳地区的优势树种。研究2020年整个生长季(4—11月)油松周尺度的形成层及木质部细胞变化,分析油松在沈阳地区的生长规律。结果表明: 油松形成层分裂活动开始于4月初,结束于9月末。木质部从扩大细胞出现(4月中旬)开始生长,到木质化细胞消失(10月下旬)结束,其生长符合“S”型曲线。2020年生长53个/列木质部细胞,最大生长速率(0.55个/列/d)出现在5月末,早晚材细胞于7月末发生转变。在沈阳地区最低温达到0 ℃以上时树木形成层开始活动,影响木质部生长开始和结束的最低临界温度为2～3 ℃。降水在油松整个生长过程中起到促进作用。沈阳地区7月末的高温和水分供给不足是木质部细胞分化形成早晚材的主要因子。

关键词: 油松, 形成层物候, 木质部, 水热因子

Abstract: Based on the micro-core technology, we can accurately examine the tree cambium phenology and the radial growth at the cellular scale, and reveal the relationship between tree growth and climate. Pinus tabuliformis is one of the constructive species in forests of northern China. We investigated the growth pattern of P. tabuliformis in Shenyang and the changes in cambium and xylem cells throughout the growing season (April to November) in 2020. Results showed that the dividing activity in cambium started in early April and ended at the end of September. Xylem began to grow from the appearance of enlargement cells (mid April) to the end of the disappearance of lignified cells (late October), with a growth trajectory of ‘S' shape curve. Approximately 53 xylem cells per row in radical direction were produced in 2020. The maximum growth rate (0.55 ind/row/day) occurred at the end of May, while the change of earlywood and latewood cells occurred at the end of July. When the minimum temperature above 0 ℃ in Shenyang, the cambium began to divide. The minimum critical temperature that affected the beginning and ending of xylem growth was 2-3 ℃. Precipitation promoted the growth in the growing season. The high temperature and insufficient water supply at the end of July were the main factors driving the differentiation of xylem cells to form earlywood and latewood.

Key words: Pinus tabuliformis, cambium phenology, xylem, moisture and heat factor

刘伟韬, 李俊霞, 赵莹, 韩勍, 侯森, 张敬远, 李丰, 陈振举. 水热耦合对沈阳地区油松木质部生长的影响[J]. 应用生态学报, 2021, 32(10): 3468-3476.

LIU Wei-tao, LI Jun-xia, ZHAO Ying, HAN Qing, HOU Sen, ZHANG Jing-yuan, LI Feng, CHEN Zhen-ju. Effects of moisture and heat coupling on xylem growth of Pinus tabuliformis in Shenyang, China[J]. Chinese Journal of Applied Ecology, 2021, 32(10): 3468-3476.

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水热耦合对沈阳地区油松木质部生长的影响

Effects of moisture and heat coupling on xylem growth of Pinus tabuliformis in Shenyang, China

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