caa a22 4500 477109284 CHVBK 20180405111604.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00029277 doi (NATIONALLICENCE)springer-10.1007/BF00029277 Transpiration and root water uptake by olive trees [Elektronische Daten] [Félix Moreno, J. Fernández, Brent Clothier, Steven Green] While the cultivated olive tree (Olea europaea L.) is known to be sclerophyllous and effective at tolerating drought, little is known of its short-term water-use dynamics for most studies have been based on longer-term, water-balance information. We present here, for the first time, heat-pulse measurements of the sap flux measured not only within the semi-trunk of an olive tree, but also within a root excavated close to the stump. One tree in the olive grove near Seville in Spain had regularly received basin irrigation during the summer, whereas the other, growing on this deep silt loam, had been without water for over 3 months. Following a flood irrigation of 730 L to a dyked area around the tree, the regularly-irrigated olive maintained a transpiration rate of 1.65 mm3 mm−2 d−1, on a leaf area basis, for only 3 days following the irrigation. This rate was maintained for a total consumption of 110 L. It then began again to limit its rate of water use with transpiration falling below that predicted for well-watered conditions by the Penman-Monteith equation. The flow of sap in the near-surface root dropped concomitantly. Meanwhile the unirrigated tree was using water at just 0.78 mm d−1. Yet following an irrigation of 870 L it only lifted its consumption to 1.12 mm d−1, on a leaf area basis. Neither did it recover its leaf water potential following this wetting because of an inability to refill cavitated vessels. These data again show olive to be a parsimonious and cautious consumer of soil water. Kluwer Academic Publishers, 1996 heat pulse sap flow measurement nationallicence irrigation nationallicence Olea europaea L nationallicence var. manzanillo nationallicence Penman-Monteith equation nationallicence transpiration nationallicence Moreno Félix Instituto de Recursos Naturales y Agrobiologia de Sevilla, Consejo Superior de Investigaciones Cientificas, A partado 1052, 41080, Sevilla, Spain aut Fernández J. Instituto de Recursos Naturales y Agrobiologia de Sevilla, Consejo Superior de Investigaciones Cientificas, A partado 1052, 41080, Sevilla, Spain aut Clothier Brent Environment Group HortResearch Institute, P.B. 11-030, Palmerston, North New Zealand aut Green Steven Environment Group HortResearch Institute, P.B. 11-030, Palmerston, North New Zealand aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 184/1(1996-03-01), 85-96 0032-079X 184:1<85 1996 184 11104 https://doi.org/10.1007/BF00029277 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00029277 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moreno Félix Instituto de Recursos Naturales y Agrobiologia de Sevilla, Consejo Superior de Investigaciones Cientificas, A partado 1052, 41080, Sevilla, Spain aut NATIONALLICENCE 700 1- Fernández J. Instituto de Recursos Naturales y Agrobiologia de Sevilla, Consejo Superior de Investigaciones Cientificas, A partado 1052, 41080, Sevilla, Spain aut NATIONALLICENCE 700 1- Clothier Brent Environment Group HortResearch Institute, P.B. 11-030, Palmerston, North New Zealand aut NATIONALLICENCE 700 1- Green Steven Environment Group HortResearch Institute, P.B. 11-030, Palmerston, North New Zealand aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl// 184/1(1996-03-01), 85-96 0032-079X 184:1<85 1996 184 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer