Sap Flow
Evaluation of sap flow sensors to measure the transpiration rate of plants during canopy wetting and drying
... methods, sap flow measurements have widely used for direct measurements of transpiration rate in ...stem flow measurements were compared with transpiration values estimated from successive mass ...
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The relationship between sap flow rate and diurnal change of tangential strain on inner bark in Cryptomeria japonica saplings
... the sap flow declined quickly and then more slowly, for about 4 h, until the start of the second dark period, phase C, when the sap flow rate became almost constant at ...each sap ...
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A comparison of methods for determining field evapotranspiration: photosynthesis system, sap flow, and eddy covariance
... system, sap flow, and eddy ...and sap flow methods can mea- sure only a subset of leaves or plants in a ..., sap flow, and eddy covariance results could be the unmatched ...
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Identification of sap flow driving factors of jujube plantation in semi-arid areas in Northwest China
... factors. Sap flow data gathered during a two-year field study in a jujube plantation were analyzed as a surrogate for transpiration ...measured sap flows were related to changes in the soil water ...
12
Relations among Sap Flow, Soil Moisture, Weather, and Soybean Plant Parameters in High Water Demand and Final Growth Stages
... detail sap flow regulation by soil moisture, solar radiation, air temperatures, and vapor pressure deficits [4] ...[5]. Sap flow rates of soybeans and upland cotton ( Gossypium hisutum, ...The ...
15
Determination of the influence of herbicides on dicotyledons plant transpiration using the sap flow method
... Helianthus annuus L. (cv. Pikasol) was used as a model plant species because of their high sensitivity to wide spectrum of herbicides (Jursík et al. 2011). In terms of morphology, they are appropriate for installation of ...
7
Extending periodic eddy covariance latent heat fluxes through tree sap flow measurements to estimate long term total evaporation in a peat swamp forest
... measure sap flow at vari- ous depths across the sapwood of two trees over 20 months from September 2009 to early May 2011 which overlapped with the November 2009 and March 2010 field campaigns ...m. ...
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Root growth, water uptake, and sap flow of winter wheat in response to different soil water conditions
... RWU, the C model also simulates the water potential in the root collar. In the current model formulation, the water po- tential in the collar is used as a control variable which is kept fixed when a critical threshold ...
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Transpiration of montane Pinus sylvestris L and Quercus pubescens Willd forest stands measured with sap flow sensors in NE Spain
... Sap flow was measured with heat dissipation sensors made in our own laboratories according to Granier (1985, ...When sap moves upwards, the temperature dif- ference (dT) between heated and unheated ...
13
Climate Conditions Impact on the Sap Flow Into Plants and Their Dendrometric Changes
... the flow rate and the stem ...the sap flow is not computed however it maintains the accumulated flow accurately dur- ing this unbalanced ...stem flow gauges is based on the principles ...
5
Potencials of sap flow evaluation by means of acoustic emission measurements
... A correspondence can be found between the records of all the curves obtained from available measurements of temperature fi elds. Development of acoustic response activities can be found in the areas of increased ...
6
Analysis of leaf wetting effects on gas exchanges of corn using a whole-plant chamber system
... single plant even if it is wetted. The system pri- marily consisted of a whole-plant chamber (0.6 × 0.5 × 1.2 m), an air humidity sensor (HMP60, Vaisala Co., Ltd., Helsinki, Finland), an infrared CO 2 -gas analyser ...
7
Water demands and biomass production of sorghum and maize plants in areas with insufficient precipitation in Central Europe
... water flow was reported for maize (Cohen et ...and sap flow was documented (Bethenod et ...between sap flow and evapotranspiration might be less than 10% on dry soils, probably due to ...
12
Physiological Response of Cotton to a Root Zone Soil Moisture Gradient: Implications for Partial Root zone Drying Irrigation
... of sap extraction used and the origin of the elevated ABA levels measured in the stem sap given the extremes in soil moisture deficit ...of sap into the drying roots most likely occurred and ...
8
Dominant controls of transpiration along a hillslope transect inferred from ecohydrological measurements and thermodynamic limits
... We test these hypotheses with data of a measurement setup consisting of five sites along a valley cross section in Lux- embourg. Both hillslopes are covered by forest dominated by European beech (Fagus sylvatica L.). Two ...
21
Real-time measurement of phloem turgor pressure in Hevea brasiliensis with a modified cell pressure probe
... mass flow hypothesis to the anatomy of rubber tree ...xylem sap flow rate (Figure 5) and leaf water deficit (Buttery and Boatman 1964, 1966), and girding could induce a ultimately increase of turgor ...
11
Does the Normalized Difference Vegetation Index explain spatial and temporal variability in sap velocity in temperate forest ecosystems?
... tree sap velocity and a canopy trait, ...scale sap velocity up to the canopy level: a first step to scale from sap velocity to whole tree transpiration and a second step from tree to stand ...of ...
15
Water use dynamics of an alien invaded riparian forest within the Mediterranean climate zone of the Western Cape, South Africa
... daily sap flow ranged from 15 L day −1 in the smaller-class tree, 25 L day −1 in the medium-class tree and 39 L day −1 in the large-class tree (Tables 1 and ...
12
Different water relations between flowering and leaf periods:a case study in flower before leaf emergence Magnolia species
... conductance, Magnoliaceae, sap flow, stomata, water potential, xylem hydraulic... The primary function of flowers is reproduction and their development requires.[r] ...
35
Functional traits and water transport strategies in lowland tropical rainforest trees
... volumetric sap flow and velocities using the heat ratio method, and measured rates of tree growth and several stem, vessel, and leaf ...traits. Sap flow measures exhibited limited variability ...
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