Results 251 to 260 of about 153,433 (298)

Sap Flow Measurements

2017
Sap flow measurements of trees are today the most common method to determine transpiration at the tree and the forest canopy level. They provide independent measurements for flux comparisons and model validation. Sap flow measurements of Norway spruce (Picea abies) which were conducted in the mountain range of the Fichtelgebirge (Germany) are reviewed ...
Barbara Köstner, Eva Falge, Martina Alsheimer   +2 more
openaire   +1 more source

Sap Flow and Stem Respiration

2010
The effects of seasonal flooding on stem xylem flow and carbon release were investigated on common tree species of the Amazonian floodplain forests locally known as Varzea. The annual flooding lasts several months, reaches five to eight meters and drives the phenology of most forest species.
Horna, V., Zimmermann, R., Müller, E., Parolin, P.   +3 more
openaire   +3 more sources

Measurement of sap flow in plant stems [PDF]

Journal of Experimental Botany, 1996
Transpiration rates for whole plants, individual branches or tillers can be determined by techniques which measure the rate at which sap ascends stems. All of these methods use heat as a tracer for sap movement, but they are fundamentally different in their operating principles. Two methods commonly employed, the stem heat balance and trunk sector heat
D.M. Smith, S.J. Allen
exaly   +2 more sources

Apple sap flow in different light environments

Acta Horticulturae, 2018
Three photoselective, 50% shading, nets (red, white, blue) and a black, 20% shading, commercial hail net (CTRL) were placed on 6 apple trees (Malus domestica 'Rosy Glow') each, during summer 2016. Total and specific sap flows were monitored, using the thermal balance approach, on 4 branches per treatment at different phenological stages.
A. Boini, BRESILLA, KUSHTRIM, G. D. Perulli, L. Manfrini, L. Corelli Grappadelli, B. Morandi   +5 more
openaire   +1 more source

Sap flow through partially embolized xylem vessel networks

Plant, Cell & Environment
AbstractSap is transported through numerous conduits in the xylem of woody plants along the path from the soil to the leaves. When all conduits are functional, vessel lumen diameter is a strong predictor of hydraulic conductivity. As vessels become embolized, sap movement becomes increasingly affected by factors operating at scales beyond individual ...
Anna L. Jacobsen, Martin D. Venturas, Uwe G. Hacke, Robert Brandon Pratt   +3 more
openaire   +2 more sources

The seasonal sap flow of Eucalyptus botryoides

1931
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Barrett, A. O., Green, W Heber
openaire   +1 more source

Measurement of Sap Flow by Heat Transfer

Nature, 1958
IT has been assumed by those who have used a pulse of heat as an indicator to measure the rate of flow of sap in trees1 that the speed of the sap is identical with that of the heat pulse.
openaire   +1 more source

A new technique of measuring sap flow that accurately measures a wide range of sap flow rates

Accurate estimation of sap flow is vital for plant models and significantly impacts existing management policies, particularly when scaling from the plant level to plot levels. The heat pulse method (HPM) is widely used for measuring sap flow in plants because of its added benefits compared to other traditional methods.
Spandan s b, Venketraman srinivasan
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ENGINEERING A SAP FLOW SENSOR FOR IRRIGATORS

Acta Horticulturae, 2013
Sap flow sensors designed for irrigators – as distinct from scientific researchers – must be inexpensive and robust, simple to install and interpret, and able to advise a grower when the crop is becoming water stressed. Modern growers also expect data to be delivered to them wherever they may be and whenever they want it, which impacts directly on the ...
openaire   +1 more source