Characteristics of CO2 and H2O Fluxes of Leaves of Trees under Different Seasonal and Soil Moisture Conditions

緑子, 小杉; 彰宏, 中村; 克典, 田中; 澄治, 小橋

doi:10.7211/jjsrt.22.163

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…2 trees/m 2 ) on improved soil in order to achieve crown closure in a short period. Rapid growth in height and volume (Murata and Komaki, 2001) and physiological characteristics in wet soil (Kosugi et al, 1997) have indicated success in forestation of reclaimed land by this method. Recently, however, biodiversity has become an important concept in ecosystem management.…”

Section: Introductionmentioning

confidence: 97%

Adaptive management approach to increasing the diversity of a 30-year-old planted forest in an urban area of Japan

Morimoto

Mizutani

2005

Landscape and Urban Planning

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Section: Introductionmentioning

confidence: 97%

Adaptive management approach to increasing the diversity of a 30-year-old planted forest in an urban area of Japan

Morimoto

Mizutani

2005

Landscape and Urban Planning

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“…Although stomata are the major channels of transpiration and photosynthesis, they have a slightly different response to these two processes. For instance, at a given transpiration amount, leaves regulate stomata initiatively to maximize the photosynthetic rate [16][17][18]. Thus, Leuning [18] and Collatz et al [19] introduced the idea of coupling photosynthesis, transpiration, and heat balance.…”

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confidence: 99%

Water-carbon coupling modeling of summer maize at the leaf and canopy scales

Zhang

Liu

et al. 2013

Chin. Sci. Bull.

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Transpiration and photosynthesis are two closely related and intercoupled processes that dominate the physiological activities and yield of crops. Therefore, there is a need to study water-carbon coupling modeling at various scales to increase water use efficiency (WUE). Using a summer maize field in North China as an example, the variations in leaf and canopy photosynthesis and transpiration (or evapotranspiration) were analyzed. The synthetic model of photosynthesis-transpiration based on stomatal behavior (SMPT-SB) was then calibrated and validated at the two scales. The leaf photosynthesis and transpiration, as well as the canopy photosynthesis and evapotranspiration, have a consistent diurnal trend. However, the canopy evapotranspiration is affected more by topsoil moisture content. The regression coefficient between leaf photosynthesis, transpiration, and WUE estimated by the SMPT-SB and the measured values was found to approach 1, with a coefficient of determination of more than 0.74. The relative error between the two sets of values is less than 11%. Therefore, the SMPT-SB could express fairly well leaf photosynthesis, transpiration, and WUE. The estimated canopy-scale photosynthesis by the SMPT-SB is also in good agreement with the measured values. However, this model underestimates the canopy evapotranspiration when the topsoil has high moisture content and therefore overestimates, to a certain extent, the canopy WUE. Farmland water cycle and carbon cycle are closely related and intercoupled ecological processes that affect the physiological activities and yield of plants [1,2]. Hence, the coupling of water and carbon cycles should be studied to improve water use efficiency (WUE). And the study of water-carbon coupling at the leaf and canopy scales could provide an insight into the physio-ecological mechanism of stomatal control during water and carbon cycle processes, reveal the scale effect and intrinsic link of water-carbon coupling and serve as a basis in establishing a coordinated and unified water-carbon coupling model and WUE estimation method.At present, evapotranspiration estimation models, including the Penman-Monteith (P-M) model [3,4], Shuttleworth-Wallace model [5], and other multilayer models [6,7], are mainly based on both energy and water equilibrium principles. Numerous plant photosynthesis models were also reported, such as the leaf biochemical model suggested by Farquar and Von Caemmerer in 1982, which expresses the photosynthetic rate as a function of intercellular carbon dioxide (CO 2 ) concentration, light quantum flux density, and temperature [8]. And the model is extensively used because of its few parameters [9][10][11]. Canopy-scale photosynthesis models are generally developed by expanding leaf photosynthesis models at the canopy scale, and they can be categorized into single-layer model [12,13], two-layer mod-

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Impact of leaf physiological characteristics on seasonal variation in CO2, latent and sensible heat exchanges over a tree plantation

Tanaka

Kosugi

Nakamura

2002

Agricultural and Forest Meteorology

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Characteristics of CO2 and H2O Fluxes of Leaves of Trees under Different Seasonal and Soil Moisture Conditions

Cited by 4 publications

References 9 publications

Adaptive management approach to increasing the diversity of a 30-year-old planted forest in an urban area of Japan

Adaptive management approach to increasing the diversity of a 30-year-old planted forest in an urban area of Japan

Water-carbon coupling modeling of summer maize at the leaf and canopy scales

Impact of leaf physiological characteristics on seasonal variation in CO2, latent and sensible heat exchanges over a tree plantation

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