新丰江库区鹿角锥和木荷树干液流特征及其影响因素

doi:10.13292/j.1000-4890.202511.027

生态学杂志 ›› 2025, Vol. 44 ›› Issue (11): 3569-3577.doi: 10.13292/j.1000-4890.202511.027

新丰江库区鹿角锥和木荷树干液流特征及其影响因素

冯英杰^1,2，赵新宇¹，张卫强²，刘佩伶¹，黄芳芳²，刘效东^1*

（¹华南农业大学林学与风景园林学院，广州 510642； ²广东省森林培育与保护利用重点实验室，广东省林业科学研究院，广州 510520）

出版日期:2025-11-10 发布日期:2025-11-07

The sap flow characteristics and influencing factors of Castanopsis lamontii and Schima superba in Xinfengjiang Reservoir Area.

FENG Yingjie^1,2, ZHAO Xinyu¹, ZHANG Weiqiang², LIU Peiling¹, HUANG Fangfang², LIU Xiaodong^1*

(¹College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; ²Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China).

Online:2025-11-10 Published:2025-11-07

摘要/Abstract

摘要： 探究不同树种树干液流特征及其环境调控机制，对森林可持续性经营和区域林水管理具有重要意义。本研究通过对新丰江库区常绿阔叶林两种建群树种——鹿角锥（Castanopsis lamontii）和木荷（Schima superba）的树干液流特征进行连续测定，并同步监测林外环境因子，探究两树种树干液流昼夜分布特征及其影响因素。结果表明：鹿角锥的平均日间液流速率和夜间液流速率分别为4.7±0.2和0.20±0.01 cm³·cm^-2·h^-1；木荷的平均日间液流速率和夜间液流速率分别为3.3±0.1和0.22±0.02 cm³·cm^-2·h^-1。研究期间，鹿角锥的树干液流总量为236.7 mm，高于木荷的树干液流总量（147.5 mm）。鹿角锥和木荷日间液流量对液流总量的贡献率分别为93.1%和91.9%，夜间液流量的贡献率分别为6.9%和8.1%。相关性分析表明，两树种日间液流量均受到各观测环境因子的显著影响（P<0.01），而夜间液流量对各环境因子的响应有所不同。进一步分析表明，日间大气温度和日间光合有效辐射是影响两树种湿季和干季日间树干液流量的主要因素；对于夜间而言，湿季两树种树干液流量主要影响因子均为日间液流量、夜间大气降雨和夜间饱和水汽压，干季时鹿角锥主控因子为日间液流量、夜间大气温度、夜间大气降雨和夜间饱和水汽压差，木荷则仅与夜间饱和水汽压差和夜间大气降雨有关。因此，为提高林木耗水量测算的准确性，应充分考虑树种夜间树干液流动态及其驱动机制。本研究结果可为该地区准确估算林分耗水及林水管理提供参考。

关键词: 树干液流, 昼夜动态, 蒸腾, 水源涵养, 水文过程, 新丰江库区

Abstract: Exploring the characteristics of sap flow among different tree species and environmental regulation mechanisms is of great significance to sustainable forest management and regional water resource management. We investigated the diurnal distribution characteristics of sap flow in these two tree species, Castanopsis lamontii and Schima superba, in the monsoon evergreen broad-leaved forest in the Xinfengjiang Reservoir Area, and synchronously monitored the environmental factors outside the forest. The results showed that the average daytime and nighttime sap flow rates of C. lamontii were 4.7±0.2 and 0.20±0.01 cm³·cm^-2·h^-1, respectively. The average daytime and nighttime sap flow rates of S. superba were 3.3±0.1 and 0.22±0.02 cm³·cm^-2·h^-1, respectively. The total sap flow in C. lamontii was 236.7 mm during the whole study period, which was higher than that in S. superba (147.5 mm). The contributions of daytime sap flow to total sap flow were 93.1% and 91.9% for C. lamontii and S. superba, respectively. The contributions of nighttime sap flow were 6.9% and 8.1%, respectively. The daytime sap flow of the two tree species was significantly affected by various environmental factors (P<0.01), while the nighttime sap flow had different responses to environmental factors. Daytime temperature and daytime photosynthetically active radiation were the main factors affecting the daytime sap flow of both species in wet and dry seasons. For nighttime sap flow, daytime sap flow, nighttime precipitation, and nighttime vapor pressure deficit were the main factors influencing both species during the wet season. In the dry season, the dominant factors for C. lamontii were daytime sap flow, nighttime temperature, nighttime precipitation, and nighttime vapor pressure deficit. For S. superba, the only relevant factors were nighttime vapor pressure deficit and nighttime precipitation. Therefore, it is necessary to fully consider the nighttime variations in sap flow in order to improve the accuracy of estimating the tree water consumption. Our results provide a reference for accurately estimating forest water consumption and forest water management.

Key words: sap flow, day and night dynamics, transpiration, water conservation, hydrologic process, Xinfengjiang Reservoir Area

冯英杰, 赵新宇, 张卫强, 刘佩伶, 黄芳芳, 刘效东. 新丰江库区鹿角锥和木荷树干液流特征及其影响因素[J]. 生态学杂志, 2025, 44(11): 3569-3577.

FENG Yingjie, ZHAO Xinyu, ZHANG Weiqiang, LIU Peiling, HUANG Fangfang, LIU Xiaodong. The sap flow characteristics and influencing factors of Castanopsis lamontii and Schima superba in Xinfengjiang Reservoir Area.[J]. Chinese Journal of Ecology, 2025, 44(11): 3569-3577.

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新丰江库区鹿角锥和木荷树干液流特征及其影响因素

The sap flow characteristics and influencing factors of Castanopsis lamontii and Schima superba in Xinfengjiang Reservoir Area.

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