Liu Qing-Xin, Meng Ping, Zhang Jin-Song, Gao Jun, Huang Hui, Sun Shou-Jia, Lu Sen
Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China.
Ying Yong Sheng Tai Xue Bao. 2011 Dec;22(12):3343-50.
Transpiration is a major component of vegetation evapotranspiration, and a core in the study of plant water physiological ecology. Its measurement methods attracted extensive attention, among which, thermal dissipation is considered as an optimal method for measuring tree transpiration. Numerous studies showed that thermal dissipation method was relatively accurate in measuring individual tree transpiration and stand-scale water consumption. However, there exist potential errors between the true value and the measurements during measurement process. In this paper, the potential errors of thermal dissipation method in measuring sap flux density and of the temperature difference determination from single tree to stand-scale were reviewed, and the research prospects on the potential errors of thermal dissipation method in China were discussed. The corresponding solutions were also proposed.
蒸腾作用是植被蒸散的主要组成部分，也是植物水分生理生态学研究的核心内容。其测量方法备受关注，其中热扩散法被认为是测量树木蒸腾作用的最佳方法。大量研究表明，热扩散法在测量单株树木蒸腾和林分尺度水分消耗方面相对准确。然而，在测量过程中，测量值与真实值之间存在潜在误差。本文综述了热扩散法在测量液流通量密度以及从单株树木到林分尺度的温差测定方面存在的潜在误差，并探讨了我国热扩散法潜在误差的研究前景。同时也提出了相应的解决办法。
