Details

Autor(en) / Beteiligte

• Liu, Wen Na
• Jia, Jian Bo
• Yu, Xin Xiao
• Jia, Guo Dong
• Hou, Gui Rong

Titel

Characteristics of canopy stomatal conductance of Platycladus orientalis and its responses to environmental factors in the mountainous area of North China

Ist Teil von

• Ying yong sheng tai xue bao, 2017-10, Vol.28 (10), p.3217-3226

Ort / Verlag

China

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Canopy stomatal conductance (g ) is an important biological parameter to measure water vapor flux in canopy atmosphere interface. Exploring characteristics of canopy stomatal conductance and its responses to environmental factors can offer theoretical evidence for conducting mechanism based study of vapor exchange process in forest canopy. SF-L thermal dissipation probe was adopted to measure sap flow density (J ) of Platycladus orientalis in 2014. The environmental factors including photosynthetically active radiation (PAR), vapor pressure deficit (VPD) and air temperature (T) were simultaneously observed. The canopy stomatal conductance was calculated, and the responses of g to environmental factors were analyzed. The results showed that the daily variation of sap flow density was of two peak pattern curve, and the J in growing season was higher than in non-growing season. And the bigger DBH was, the higher J would be. The daily variation of canopy stomatal conductance was similar to the canopy transpiratio