African Mahogany transpiration with Granier method and water table lysimeter

Sérvulo, Ana Cláudia Oliveira; Vellame, Lucas Melo; Casaroli, Derblai; Júnior, José Alves; Souza, Pedro Henrique de

doi:10.1590/1807-1929/agriambi.v21n5p322-326

Cited by 6 publications

(6 citation statements)

References 17 publications

(19 reference statements)

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“…This behavior can be attributed to the continuity of SF, even in case of minimal radiation, and aims to replenish the water lost through the plant tissue throughout the day. The latter was also observed by other authors (Delgado-Rojas et al, 2006;Sérvulo et al, 2017).…”

Section: Resultssupporting

confidence: 87%

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

et al. 2019

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The answers to when and how much to irrigate orchards can be obtained based on the measurements of plants' transpiration and leaf temperature. This study aims to determine the leaf temperature and sap flow of the pequi tree (Caryocar brasiliense Camb.), both with and without water restriction. Further, the leaf temperature was measured by infrared thermometry and estimated transpiration using the Granier method, where the thermal dissipation probes are inserted into the plant stems. The experiment was conducted in a 120-plant orchard located in Goiânia-GO, Brazil, from which seven of the plants (3 irrigated and 4 non-irrigated; aged 6.6-7.4 years) were evaluated for eight months (October 2015 to May 2016). The soil was characterized as a dystrophic red latosol, and its water content was determined using the EC-5 capacitance sensors. The results denoted that the leaf temperature of the irrigated plants was lower than the median air temperature during summer and the transition period into the dry season, and the non-irrigated plants exhibited shortage of water availability during the dry season. In dryland conditions, the average transpiration was 24.09 L plant −1 day −1 and, when irrigated, became 42.29 L plant −1 day −1 .

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Section: Resultssupporting

confidence: 87%

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

et al. 2019

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“…To test the relationship between wood structures and the calibration parameters of the Granier formula on a broader scale, both measured data in this study and published data were used. The published calibration and wood structure data were directly retrieved from tables or the TRY database [2,6,8,10,11,15,16,[18][19][20][21][22][23][24]26,27,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. To enlarge the data range, the published calibrated species that found only one or two structure parameters were also included in this analysis.…”

Section: Data Extraction and Statisticsmentioning

confidence: 99%

Applicability of Thermal Dissipation Method in Sap Flow Measurement of Karst Shrub Community

Qin,

Ni,

et al. 2024

Forests

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Although the thermal dissipation probe (TDP) method is prominent in forest transpiration studies, the accurate estimation of sap flow density in particular trees with different wood structures remains highly variable. To verify the applicability of the TDP method in the measurement of the transpirational water consumption of shrub communities in degraded karst areas in southern China, Granier’s original formula was validated and corrected using the isolated stem segment method with Celtis sinensis, Xylosma congesta, Triadica sebifera, Paliurus ramosissimus, Pyracantha fortuneana, Sageretia thea, and Phanera championii. Finally, the correction coefficients were analyzed in relation to wood structural parameters. Our study reveals that the sap flow density estimated using Granier’s original formula exhibited varying degrees of overestimation or underestimation compared to the measured sap flow density. The differences ranged from −78.9% to 114.2%, highlighting the need for formula correction. Consequently, we adjusted the coefficients α and β of the original formula (n = 3–5), resulting in a revised range of 0.0047–0.0509 g cm−2 s−1 and 0.5882–1.9821 (R2 = 0.81–0.97), respectively. The conduit diameter was significantly correlated with the correction coefficient α. It is currently unknown whether the results obtained for a particular species can be applied to different growth environments and more prominent individuals of the same species. In conclusion, it is necessary to verify the applicability of Granier’s original formula when estimating water consumption through transpiration in trees.

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“…There are several methods that correlate transpiration with sap flow and have been used in research concerning the use of water by plants, such as the thermal dissipation method [8,9], the heat equilibrium method [10,11] and the heat pulse velocity method, mainly the heat ratio method, initially proposed by [12] and later improved by [13]. This method has advantages over other methods, as it allows the measurement of low (slow) and reverse (negative) flows [14,15], which helps in the correct determination of the percentage of sap flow that is destined for rehydration and redistribution in the root system.…”

Section: Introductionmentioning

confidence: 99%

Sap flow and transpiration of young Brazilian mahogany plants submitted to soil water potential variation

Amaral

Vellame

Silva³

et al. 2023

Sci. Plena

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Brazilian mahogany (Swietenia macrophylla King) is a forest species of economic and environmental interest due to its wood’s great finish and its use in recovering and recomposing ecosystems. However, clarification on how this species uses water resources is still necessary. This study proposes to evaluate sap flow and transpiration behavior in young Brazilian mahogany plants under variable conditions of soil water potential. We conducted the study in a protected environment and cultivated the plants in weighing lysimeters wherein the soil underwent potential variations between -10 kPa and -35 kPa during periods of water restriction, rehydration, and full irrigation. To quantify water use in the mahogany plants, we measured sap flow through heat pulses, transpiration through the weighing lysimeters, and evapotranspiration by weather variables. Sap flow and transpiration are affected negatively by soil water potential variation. The leaves lost water to the atmosphere under water deficit conditions, even with the absence of upward sap flow. Sap flow was restored four days after irrigation had resumed.

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African Mahogany transpiration with Granier method and water table lysimeter

Cited by 6 publications

References 17 publications

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

Applicability of Thermal Dissipation Method in Sap Flow Measurement of Karst Shrub Community

Sap flow and transpiration of young Brazilian mahogany plants submitted to soil water potential variation

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