热带季节雨林多花白头树年内径向生长动态及其对环境因子的响应

doi:10.13287/j.1001-9332.202110.027

应用生态学报 ›› 2021, Vol. 32 ›› Issue (10): 3567-3575.doi: 10.13287/j.1001-9332.202110.027

热带季节雨林多花白头树年内径向生长动态及其对环境因子的响应

韦小练^1,2, 范泽鑫^1,3,4, Arisa Kaewmano^1,2, 林友兴^1,3, 陈礼敏^1,2, 付培立^1,3*

¹中国科学院西双版纳热带植物园, 热带森林生态学重点实验室, 云南勐腊 666303;
²中国科学院大学, 北京 100049;
³云南哀牢山森林生态系统国家野外科学观测研究站, 云南景东 676209;
⁴中国科学院核心植物园, 云南勐腊 666303

收稿日期:2021-05-22 修回日期:2021-08-06 出版日期:2021-10-15 发布日期:2022-04-15
通讯作者: * E-mail: fpl@xtbg.org.cn
作者简介:韦小练, 男, 1996年生, 硕士研究生。主要从事树轮生态学研究。E-mail: weixiaolian@xtbg.ac.cn
基金资助:
国家自然科学基金项目(31870591,3186113307)、中国科学院版纳植物园“135”项目(2017XTBG-F01)和中德国际合作项目(DFG-BR 1895/31-1)资助

Intra-annual radial growth of Garuga floribunda in tropical seasonal rain forest and its response to environmental factors in Xishuangbanna, Southwest China

WEI Xiao-lian^1,2,FAN Ze-xin^1,3,4, KAEWMANO Arisa^1,2, LIN You-xing^1,3, CHEN Li-min^1,2, FU Pei-li^1,3*

¹CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, Yunnan, China;
²University of Chinese Academy of Sciences, Beijing 100049, China;
³Ailaoshan Station of Subtropical Forest Ecosystem Studies, Jingdong 676209, Yunnan, China;
⁴Core Botanical Garden of Chinese Academy of Sciences, Mengla 666303, Yunnan, China

Received:2021-05-22 Revised:2021-08-06 Online:2021-10-15 Published:2022-04-15
Contact: * E-mail: fpl@xtbg.org.cn
Supported by:
National Natural Science Foundation of China (31870591, 3186113307), the Chinese Academy of Sciences (CAS) 135 Program (2017XTBG-F01), and the Sino-Germany Cooperation Project (DFG-BR 1895/31-1).

摘要/Abstract

摘要： 为了解热带地区树木的季节性生长动态和规律,在西双版纳热带季节雨林利用高精度生长仪和微树芯法对落叶树种多花白头树的径向生长季节动态进行监测。结合木质部非结构性碳水化合物和环境因子的监测,分析其形成层活动和径向季节动态的生理生态驱动因子。结果表明: 在2020年,生长仪的监测显示,多花白头树于5月底(儒略日DOY:149.3±7.2)开始生长,8月底(DOY:241.0±14.7)生长结束,年生长量为3.12 mm,最大生长速率为0.04 mm·d^-1。而微树芯法显示,扩大细胞3月9日(DOY:69.2±6.2)开始出现,9月19日(DOY:262.8±2.8)细胞加厚结束,木质部生长量为1.76 mm,最大生长速率为0.009 mm·d^-1。多花白头树径向日生长量与生长季的降水、相对湿度、日最低气温、深度为20 cm的土壤含水量和温度呈显著正相关,而与日最高气温、水汽压亏缺、最大风速和水汽压呈显著负相关。多花白头树边材淀粉含量和可溶性糖含量均在生长季开始之前保持较高水平,淀粉含量在3月底达到最低,而可溶性糖含量5月中旬达到最低,随着生长季的结束淀粉和可溶性糖的含量分别在10月中旬和12月底达到最高。

关键词: 多花白头树, 高精度生长仪, 微树芯法, 非结构性碳水化合物

Abstract: We examined the seasonal growth dynamics of a deciduous tree species Garuga floribunda in the tropical seasonal rain forest in Xishuangbanna and monitored the stem radial growth with both high resolution dendrometer and microcoring methods. Combining with the monitoring of non-structural carbohydrates (NSCs) in stem and environmental factors, we analyzed the eco-physiological drivers underlying the seasonal cambial activity and radial growth dynamics. The results of high reso-lution dendrometer method showed that the growth of G. floribunda began at the end of May (day of year, DOY: 149.3±7.2) and ended at the end of August (DOY: 241.0±14.7) in 2020, the annual total radial growth was 3.12 mm, and the maximum growth rate was 0.04 mm·d^-1. Based on the microcoring methods, we found that xylem cell enlarging started from March 9th (69.2±6.2) and cell wall thickening ended on September 19th (DOY: 262.8±2.8). The cumulative xylem radial growth was 1.76 mm, and the maximum growth rate was 0.009 mm·d^-1. The daily radial growth rate of G. floribunda was significantly and positively correlated with precipitation, relative humidity, daily minimum air temperature, soil moisture and temperature at the depth of 20 cm, and was negatively correlated with daily maximum air temperature, vapor pressure deficit, maximum wind speed, and water vapor pressure. The starch and soluble sugar contents in the sapwood of G. floribunda were relatively higher before the growing season. The starch content was lowest in the end of March, while the content of soluble sugars was lowest in middle of May. At the end of the growing season, the contents of starch and soluble sugar in G. floribunda peaked in the middle of October and the end of December, respectively.

Key words: Garuga floribunda, high resolution dendrometer, microcoring, non-structural carbohydrate

韦小练, 范泽鑫, Arisa Kaewmano, 林友兴, 陈礼敏, 付培立. 热带季节雨林多花白头树年内径向生长动态及其对环境因子的响应[J]. 应用生态学报, 2021, 32(10): 3567-3575.

WEI Xiao-lian,FAN Ze-xin, KAEWMANO Arisa, LIN You-xing, CHEN Li-min, FU Pei-li. Intra-annual radial growth of Garuga floribunda in tropical seasonal rain forest and its response to environmental factors in Xishuangbanna, Southwest China[J]. Chinese Journal of Applied Ecology, 2021, 32(10): 3567-3575.

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热带季节雨林多花白头树年内径向生长动态及其对环境因子的响应

Intra-annual radial growth of Garuga floribunda in tropical seasonal rain forest and its response to environmental factors in Xishuangbanna, Southwest China

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