Stand Transpiration Estimates from Recalibrated Parameters for the Granier Equation in a Chinese Fir (Cunninghamia lanceolata) Plantation in Southern China
| Autor: | Jiangrong Li, Xu Chuanhong, Pifeng Lei, Kaiyu Xiao, Shuai Ouyang, Xiangwen Deng, Zhonghui Zhao, Wenhua Xiang |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
stand transpiration 010504 meteorology & atmospheric sciences Wood production biology Vapour Pressure Deficit Diameter at breast height Forestry lcsh:QK900-989 biology.organism_classification Atmospheric sciences water use 01 natural sciences Cunninghamia lanceolata Evapotranspiration lcsh:Plant ecology Environmental science Relative humidity sap flow density Cunninghamia Water use 010606 plant biology & botany 0105 earth and related environmental sciences Transpiration |
| Zdroj: | Forests; Volume 9; Issue 4; Pages: 162 Forests, Vol 9, Iss 4, p 162 (2018) |
| ISSN: | 1999-4907 |
| DOI: | 10.3390/f9040162 |
| Popis: | Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) is an important native tree species that is widely distributed in subtropical areas of southern China and cultivated for wood extraction. However, information on water use by Chinese fir plantations is still scarce. In this study, we performed species-specific parameter calibrations for the original Granier equation for sap flow density (SFD) estimates. Stand transpiration (Es) was related to environmental inputs, such as rainfall, air temperature (Ta), vapor pressure deficit (VPD), photosynthetically-active radiation (PAR), air relative humidity (RH), and potential evapotranspiration (PET) in order to examine how environmental factors affect the Es of Chinese fir plantations. According to our results, Granier’s original parameters set underestimated C. lanceolata SFD by up to 54% compared to our species-specific calibrated parameters set. A strong positive correlation was found between SFD, diameter at breast height (DBH), and tree height among trees populations. The total Es in 2015 was 522.1 mm, with obvious seasonal dynamics and an average of 1.4 mm·day−1. Daily and monthly Es were positively correlated with VPD, PAR, Ta, and PET. A negative relationship between Es and RH was detected only at a daily timescale. Our findings indicate that the original Granier equation requires a parameter calibration when it is applied to species-specific thermal dissipation probe (TDP) estimates, and our findings can also provide novel insights on the water use of Chinese fir in major wood production areas in Southern China. |
| Databáze: | OpenAIRE |
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