Underground water use by Eucalyptus trees in an arid climate

Cohen, Y.; Adar, Eilon; Dody, Avraham; Schiller, G.

doi:10.1007/pl00009679

Cited by 19 publications

(8 citation statements)

References 19 publications

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“…Our results in Eucalyptus trees support their findings; the radial profile of v in trees growing in a "liman" (flood water irrigated plot) in the Negev Highland was limited to a maximum depth of 32 mm below the cambium (Cohen et al 1997). But the radial gradient of the Eucalyptus trees examined in this study reached 52.5 mm depth below the cambium (Table 1).…”

Section: Conductive Sapwood Areasupporting

confidence: 93%

Variations in the radial gradient of sap velocity in trunks of forest and fruit trees

Cohen

Cantuarias-Avilés³

et al. 2007

Plant Soil

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We studied the radial pattern of sap velocity (v) in trunks of six forest species: Cupressus sempervirens L; Eucalyptus camaldulensis F. Muell; Pinus halepensis Mill. (Alleppo pine); Quercus aegilops L. ssp. ithaburensis [Decne] Boiss; Quercus calliprinos Webb; Quercus rotundifolia Lam. (Syn. Quercus ilex spp. Rotundifolia) and three fruit species: Citrus sinensis L. Osback; Malus domestica cv. Golden Delicious; Persea americana Mill. Data was selected from measurements made over a period of 15 years.For each species, at least data of 1-2 weeks measured on days with clear sky and after a rain event or irrigation were analyzed. Measurements were made with the T max heat pulse method, and six points were measured along the radius of the trunk. Two types of radial pattern were found; in one type the highest v value was recorded near the cambium, decreasing toward the heartwood; and the other type had low v near the cambium increasing toward a depth of 12 to 20 mm below the cambium and decreasing with depth to the heartwood. There was large interspecies variability of v in both the pattern of radial gradient with depth and the distance between the cambium and the border of conducting sapwood. Variations in radial pattern of v between trees within species were generally small with a coefficient of variation of 4-20%. The mean fractions of volumetric flow in the 0-16 and 0-24 mm layers below the cambium were 59% and 79% of the total flow, respectively. The distance between the cambium and the border between conducting and non-conducting sapwood varied from 31 to 66 mm in the various species. The radial distribution of sap velocity with azimuth around the trunk had a coefficient of variation similar to that found between trees of the same species. The amplitude of the azimuthal variation changed during the day; it was high in the mornings and evenings and low at noon. The variation of sap velocity in three azimuths was more affected by the structure of each individual trunk than by the position with respect to the sun.Keywords Azimuthal variations . Conductive sapwood . Radial distribution of volumetric flow . T max heat pulse method Plant Soil (2008) 305:49-59

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Section: Conductive Sapwood Areasupporting

confidence: 93%

Variations in the radial gradient of sap velocity in trunks of forest and fruit trees

Cohen

Cantuarias-Avilés³

et al. 2007

Plant Soil

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“…The hourly sap flux (l h À1 ), i.e., transpiration rate, of a tree during daylight hours (06:00 to 19:00 h) was computed from the sap flow velocity recorded by each of the six probe thermistors, the xylem cross-sectional area represented by each thermistor, the wet-wood physical properties of the oak species and a coefficient of 0.565, which is the slope of the linear regression between the gravimetrically determined water loss and the calculated amount of sap flow. This value has been reported previously for several other tree species (Cohen et al, 1981(Cohen et al, , 1997Swanson and Whitfield, 1981;Cohen, 1994).…”

Section: Sap Flow Velocity and Transpirationsupporting

confidence: 62%

Water use by Tabor and Kermes oaks growing in their respective habitats in the Lower Galilee region of Israel

Schiller

Ungar

Cohen

et al. 2010

Forest Ecology and Management

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“…This may be a common phenomenon in eucalypts since similar results were found in other eucalypt species (Kidanu, 2005). A high density of fine and medium-sized roots were reported in E. urophylla in the first 20 cm of the upper soil, and a marked decrease of the root density in the lower soil layers (Cohen et al, 1997), which may explain the reduced crop yield due to competition for soil water. It should be noted here that clay particle distribution in the soil increased with distance from eucalypt woodlots.…”

Section: Eucalypt Woodlots Reduce Water Availabilitysupporting

confidence: 79%

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

Mugunga

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Underground water use by Eucalyptus trees in an arid climate

Cited by 19 publications

References 19 publications

Variations in the radial gradient of sap velocity in trunks of forest and fruit trees

Variations in the radial gradient of sap velocity in trunks of forest and fruit trees

Water use by Tabor and Kermes oaks growing in their respective habitats in the Lower Galilee region of Israel

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

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