| 五针热脉冲探头在测定树干液流中的应用 |
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| 引用本文： | 杜梦鸽,王胜,樊军. 五针热脉冲探头在测定树干液流中的应用[J]. 生态学杂志, 2017, 28(8): 2438-2444. DOI: 10.13287/j.1001-9332.201708.035 |
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| 作者姓名： | 杜梦鸽 王胜 樊军 |
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| 作者单位： | 1.西北农林科技大学资源环境学院, 陕西杨凌 712100 ;2.中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100 |
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| 基金项目： | 本文由国家自然科学基金项目(41571224,41571130082)资助 |
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| 摘 要： | 准确测量树干液流对研究树木耗水特性、植物生理和生态水文效应等具有重要意义.本文选用一种新型五针热脉冲多功能数字探头(PHPP),运用热脉冲理论,测量小叶杨树干液流,并与热扩散探针(TDP)进行对比分析,探究五针热脉冲探头测量树干液流的适用性和准确性.结果表明: 五针热脉冲探头能够准确揭示小叶杨树干液流昼夜变化规律,并且与热扩散探针测量结果呈显著的线性相关关系,R2达到0.90,均方根误差为2.75,平均相对误差为11%.PHPP探头能较为精确地识别低液流和逆液流,可以快速准确地拟合热参数,直接测得树干液流速率,应用潜力较大.
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| 关 键 词： | 五针热脉冲数字探头(PHPP) 树干液流 热扩散探针(TDP) 干旱地区 |
| 收稿时间： | 2017-04-18 |
Application of the penta-needle heat pulse probes to determine the stem sap flow |
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| DU Meng-ge,WANG Sheng,FANG Jun. Application of the penta-needle heat pulse probes to determine the stem sap flow[J]. Chinese Journal of Ecology, 2017, 28(8): 2438-2444. DOI: 10.13287/j.1001-9332.201708.035 |
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| Authors: | DU Meng-ge WANG Sheng FANG Jun |
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| Affiliation: | ;1.College of Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China ;2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China |
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| Abstract: | It is very important to measure sap flow accurately for investigating water consumption characteristics of trees, plant physiology and eco-hydrology. A new multifunctional digital penta-needle heat pulse probes (PHPP) was selected in this study, which was used to measure the sap flow of the Lobular poplar, in order to test the applicability and reliability of the new penta-needle heat pulse sensors in the measurement of sap flow in comparison with the thermal diffusion method (TDP). The results showed that PHPP can accurately obtain the diurnal variation of the sap flow of the Lobular poplar and the results had statistically significant linear correlation with TDP, with R2 being 0.90, root mean square error 2.75 and mean relative error 11%. PHPP could accurately identify low and reverse sap flow, with the thermal parameters being fitted quickly and accurately. It was a promising method to measure sap flow. |
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| Keywords: | penta-needle heat pulse probe (PHPP) sap flow thermal diffusion probe (TDP) arid region |
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