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Titolo:
Pressure-increase rate affects the accuracy of stem water potential measurements in deciduous fruit trees using the pressure-chamber technique
Autore:
Naor, A; Peres, M;
Indirizzi:
Golan Res Inst, IL-12900 Katzrin, Israel Golan Res Inst Katzrin Israel IL-12900 es Inst, IL-12900 Katzrin, Israel Minist Agr & Rural Dev, Extens Serv, IL-10200 Kiriat Shemona, Israel Minist Agr & Rural Dev Kiriat Shemona Israel IL-10200 at Shemona, Israel
Titolo Testata:
JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY
fascicolo: 6, volume: 76, anno: 2001,
pagine: 661 -
SICI:
1462-0316(200111)76:6<661:PRATAO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIZE DISTRIBUTION; CROP LOAD; STRESS; IRRIGATION; INDICATOR; YIELD; LEAF;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Naor, A Golan Res Inst, POB 97, IL-12900 Katzrin, Israel Golan Res Inst POB 97 Katzrin Israel IL-12900 900 Katzrin, Israel
Citazione:
A. Naor e M. Peres, "Pressure-increase rate affects the accuracy of stem water potential measurements in deciduous fruit trees using the pressure-chamber technique", J HORT SCI, 76(6), 2001, pp. 661

Abstract

The effect of pressure-increase rate (PIR) using the pressure-chamber technique on stem water potential measurements was studied in field-grown treesof apple (Males domestica), nectarine (Prunes persica) and pear (Pyres communis). Two aspects were examined: 1. The effects of five continuous PIRs from 0.03 up to 0.3 MPa s(-1); 2. The effects of various PIRs at the beginning of the measurement (0.03, 0.14 and 0.3 MPa s-1) followed by a low PIR (0.03 MPa s(-1)) close to the endpoint. Midday stem water potential readings decreased with increasing PIR in apple, pear and nectarine. Stem water potentials at the lowest PIR were lower by about 0.03 MPa than the values obtained by extrapolating to zero PIR. Stem water potential increased with increasing initial PIR followed by 0.03 MPa s(-1) towards the endpoint. Our datasuggest that a PIR of 0.03 MPa s(-1) is acceptable for practical irrigation scheduling in deciduous trees, and that this value should not be exceeded. High PIR at the beginning of the measurement followed by a low PIR prior to the endpoint should be avoided in deciduous trees because of an unacceptably high error. Use of a standard, continuous PIR will reduce the impact of the small inaccuracy associated with a PIR of 0.03 MPa s(-1) if the thresholds for irrigation scheduling are also determined at that PIR.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/21 alle ore 10:25:31