A Heat Balance Method for Measuring Water Flux in the Stem of Intact Plants

Sakuratani, Tetsuo

doi:10.2480/agrmet.37.9

Cited by 446 publications

(311 citation statements)

References 21 publications

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“…F s was calculated from the raw data according to the standard procedure for SHB sensors as previously described in detail (Baker & van Bavel, 1987; Sakuratani, 1981, 1984; Steinberg, van Bavel, & McFarland, 1990). The low‐temperature cut‐off filter and the high flow filter were applied as described in the manufacturer's manual (Dynagage sap flow sensors manual, Dynamax Inc.).…”

Section: Methodsmentioning

confidence: 99%

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

et al. 2018

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The productivity of short‐rotation coppice (SRC) plantations with poplar (Populus spp.) strongly depends on soil water availability, which limits the future development of its cultivation, and makes the study of the transpirational water loss particularly timely under the ongoing climate change (more frequent drought and floods). This study assesses the transpiration at different scales (leaf, tree and stand) of four poplar genotypes belonging to different species and from a different genetic background grown under an SRC regime. Measurements were performed for an entire growing season during the third year of the third rotation in a commercial scale multigenotype SRC plantation in Flanders (Belgium). Measurements at leaf level were performed on specific days with a contrasted evaporative demand, temperature and incoming shortwave radiation and included stomatal conductance, stem and leaf water potential. Leaf transpiration and leaf hydraulic conductance were obtained from these measurements. To determine the transpiration at the tree level, single‐stem sap flow using the stem heat balance (SHB) method and daily stem diameter variations were measured during the entire growing season. Sap flow‐based canopy transpiration (E c), seasonal dry biomass yield, and water use efficiency (WUE; g aboveground dry matter/kg water transpired) of the four poplar genotypes were also calculated. The genotypes had contrasting physiological responses to environmental drivers and to soil conditions. Sap flow was tightly linked to the phenological stage of the trees and to the environmental variables (photosynthetically active radiation and vapor pressure deficit). The total E c for the 2016 growing season was of 334, 350, 483 and 618 mm for the four poplar genotypes, Bakan, Koster, Oudenberg and Grimminge, respectively. The differences in physiological traits and in transpiration of the four genotypes resulted in different responses of WUE.

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Section: Methodsmentioning

confidence: 99%

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

et al. 2018

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“…The stem sap flow rate of Haloxylon ammodendron was measured by Sakuratani (1984) sap flow gauges, which were based on the heat balance method (Sakuratani 1981). A DT Logger80 was used to record and store the average data every 10 min.…”

Section: Datamentioning

confidence: 99%

Multiscale remote-sensing retrieval in the evapotranspiration of Haloxylon ammodendron in the Gurbantunggut desert, China

et al. 2012

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Transpiration, an essential component of surface evapotranspiration, is particularly important in the research of surface evapotranspiration in arid areas. The paper explores the spectral information of the arid vegetal evapotranspiration from a semi-empirical perspective by the measured data and the up-scaling method. The paper inverted the transpiration of Haloxylon ammodendron at the canopy, pixel and regional scales in the southern edge of the Gurbantunggut desert in Xinjiang, China. The results are as follows: at the canopy scale, the optimal exponential model of the sap flow rate based on the hyperspectrum is y = 0.0015e 3.8922x , R 2 = 0.806. At the pixel scale, there was a good linear relationship between the sap flow and the SR index, with a relationship of y = -1197.38x 3 ? 1048.43x 2 -305.47x ? 455.15, R 2 = 0.845. At the regional scale, based on the optimal exponential model and the EO-1 Hyperion remote-sensing data, the transpiration of the study area was inverted. Comparing the results of the SEBAL and SEBS models, the errors of the simulation results were 7.78 and 8.80 %. The paper made full use of the knowledge flow at different scales, bridging the scale difference in canopy and remote-sensing images to avoid the information bottleneck in the up-scaling. However, there are many constraints in the data acquirement, the efficiency of the models, the endmembers determination, the temporal-spatial up-scaling, and the accuracy assessment, which would be improved in future studies.

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“…The basis of the use of energy budget to measure sap flow was established by Sakuratani [10]. The method is now widely used [1,6,7].…”

mentioning

confidence: 99%

Comparison of two sap flow methods for the estimation of tree transpiration

Tournebize¹,

Stéphane²

1998

Ann. For. Sci.

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A Heat Balance Method for Measuring Water Flux in the Stem of Intact Plants

Cited by 446 publications

References 21 publications

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

Multiscale remote-sensing retrieval in the evapotranspiration of Haloxylon ammodendron in the Gurbantunggut desert, China

Comparison of two sap flow methods for the estimation of tree transpiration

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