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| 雷州半岛尾叶桉人工林树液茎流特征的研究 | |
| 引用本文： | 张宁南,徐大平,JimMorris,周光益,周国逸,吴仲民.雷州半岛尾叶桉人工林树液茎流特征的研究[J].林业科学研究,2003,16(6):661-667. |
| 作者姓名： | 张宁南 徐大平 JimMorris 周光益 周国逸 吴仲民 |
| 作者单位： | 1. 中国林业科学研究院热带林业研究所,广东,广州,510520 2. Forest,Science,Centre,Heidelberg,Victoria,Australia,3084 3. 中国科学院华南植物研究所,广东,广州,510560 |
| 基金项目： | 中澳合作项目ACIAR FST 1997/77"桉树与水"、国家科技部专项191"热带林对水资源供需调节的监测研究"、广东省自然科学基金"广东主要树种人工林水分利用的比较研究"(0113931)的部分研究内容 |
| 摘 要： | 应用热脉冲法对雷州半岛4年生尾叶桉单株树干液流时空的动态变化及与各环境因子的关系进行观测研究.研究结果表明(1)形成层以内木质部不同深度的茎流密度不同,其中靠近形成层部分液流速度较快,但各层都具有相同的日变化趋势,中午12点至1点达到最大;夜间因根压作用影响各层仍有微弱上升液流;各深度日平均茎流密度11.6 L·m-2·d-1,最大为15.3 L·m-2·d-1(晴天),最小仅为5.4 L·m-2·d-1(雨天);(2) 不同直径尾叶桉的日茎流密度具有相似日变化趋势,胸径与高度相近其茎流密度相同,大树较小树快,这主要与树木根系吸收土壤水分的能力有关;(3)热脉冲法与整树容器法对2年生幼树耗水量的同步测定结果相一致,误差仅为3.4%;(4)树干茎流量与饱和蒸气压差和太阳辐射相关性特别显著. |
| 关 键 词： | 雷州半岛 尾叶桉 人工林 树液茎流特征 环境因子 热脉冲法 蒸气压差 太阳辐射 |
| 文章编号： | 1001-1498(2003)06-0661-07 |
| 收稿时间： | 2003/4/24 0:00:00 |
| 修稿时间： | 2003年4月24日 |
Characteristics of Sap Flow in Eucalyptus urophylla Plantations on the Leizhou Peninsula |
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| ZHANG Ning-nan,XU Da-ping,JIM Morris,ZHOU Guang-yi,ZHOU Guo-yi and WU Zhong-min.Characteristics of Sap Flow in Eucalyptus urophylla Plantations on the Leizhou Peninsula[J].Forest Research,2003,16(6):661-667. | |
| Authors: | ZHANG Ning-nan XU Da-ping JIM Morris ZHOU Guang-yi ZHOU Guo-yi and WU Zhong-min |
| Institution: | Research Institute of Tropical Forestry, CAF, Guangzhou510520, Guangdong, China;Research Institute of Tropical Forestry, CAF, Guangzhou510520, Guangdong, China;Forest Science Centre,Heidelberg,Victoria,Australia3084;Research Institute of Tropical Forestry, CAF, Guangzhou510520, Guangdong, China;South China Institute of Botany, CAS, Guangzhou510650,Guangdong, China;Research Institute of Tropical Forestry, CAF, Guangzhou510520, Guangdong, China |
| Abstract: | Heat pulse method was applied to study sap flux density (SFD) of single tree in 4-year-old Eucalyptus urophylla plantation from September 1999 to September 2000 on Leizhou Peninsula, southern China. The results indicated that SFD of outer sapwood moved faster than the inner; the daily SFD of trees with different diameter followed similar pattern, the bigger trees had faster SFD than smaller trees due to size of root system. To prove the accuracy of heat pulse method, water use of a 2-year-old young tree with height of 6 m was measured by the heat pulse method and a cut-stem method at the same time.It was showed that the estimated water use differed by 3.4% only. Among meteorological factors, solar radiation and VPD were the main factors affecting the sap flow. The heat pulse method was proved to be a accurate way to measure water transpiration by eucalypt tree plantations and recommended for wider application in water balance studies of plantations. |
| Keywords: | heat pulse method Eucalyptus urophylla sap flow density |
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