欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

毛红椿人工林树干液流动态变化对坡位的响应

刘军1,陈文荣2,徐金良3,邹军2,姜景民1**,李彦杰1,刁松峰1   

  1. (1中国林业科学研究院亚热带林业研究所, 浙江富阳 311400; 2福建省国有来舟林业试验场, 福建南平 353004; 3开化县林场, 浙江开化 234300)
  • 出版日期:2014-08-18 发布日期:2014-08-18

Trunk sap flow dynamic changes in response to the slopes of plantation of Toona ciliata var. pubescens.

LIU Jun1, CHEN Wen-rong2, XU Jin-liang3, ZOU Jun2, JIANG Jing-min1, LI Yan-jie1, DIAO Song-feng1   

  1. (1Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China; 2Laizhou National Forest Farm, Nanping 353004, Fujian, China; 3Kaihua County Forest Farm, Kaihua 234300, Zhejiang, China)
  • Online:2014-08-18 Published:2014-08-18

摘要:

2012年7—10月,采用液流测定系统监测了位于浙江省开化县的毛红椿人工林上下坡位的树干液流,并同步监测生态环境因子,分析了毛红椿人工林树干液流与土壤含水量、温度和水势等环境因子的关系.结果表明: 研究区上、下坡位树干液流日变化均呈典型的“昼高夜低”单峰曲线;下坡位毛红椿树干液流速率平均值显著高于上坡位;上坡位土壤温度显著高于下坡位,而下坡位土壤含水量和土壤水势显著高于上坡位;下坡位土壤含水量和土壤水势是影响毛红椿树干液流速率的主要因子,而上坡位土壤温度和土壤水势对毛红椿树干液流速率有较大影响.
 

Abstract: The sap flow and environmental factors, including temperature, water content and water potential of soil, were continuously measured by using an autodata collection system at the upper and lower slopes of Toona ciliata var. pubescens plantation in July to October, 2012 to investigate the relationships between the sap flow and environmental factors. The results showed that, the trunk sap flow velocity of the two positions both presented a typical singlepeak curve, with high values in the daytime and low values in the nighttime. The average sap flow of the lower slope was significantly  higher than that of the upper slope. Soil temperature of the upper slope was significantly higher than that of the lower slope, and soil water content and water potential were vice versa. Soil water content and water potential were the leading environmental factors affecting the trunk sap flow velocity at the lower slope, while soil temperature and water potential were the main environmental factors at the upper slope.