caa a22 4500 445837632 CHVBK 20180317145334.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s00271-010-0217-5 doi (NATIONALLICENCE)springer-10.1007/s00271-010-0217-5 A comparative study of apple and pear tree water consumption measured with two weighing lysimeters [Elektronische Daten] [Joan Girona, Jesus del Campo, Merce Mata, Gerardo Lopez, Jordi Marsal] A five-year experiment (2002-2006) was conducted to determine apple (cv ‘Golden Smoothee') and pear (cv ‘Conference') crop coefficients (Kc) using two large weighing lysimeters. Daily reference evapotranspiration (ETo) and crop evapotranspiration (ETc) were evaluated. Midday canopy light interception of both crops planted in hedgerows, 4×1.6m, was determined on a weekly basis from bud-break until leaf fall from year 2002 (fourth after planting) to year 2006 of both plantations. Relationships between canopy light interception and calculated Kc (ETc/ETo) were evaluated from bud-break until harvest. There were differences in Kc values between apple and pear trees. When daily Kc values from bud-break until harvest were adjusted to hyperbolic functions each year, adjusted curves for pear trees were very similar regardless of year (maximum Kc around 1.0). In apple trees, the maximum values of Kc increased over time, from 0.49 in 2002 to 1.04 in 2006. Midday light interception in both apple and pear trees increased during the 5years of experiment from 29.0 to 45.6% in apples and from 27.5 to 41.6% in pears in midsummer. Although there was a significant positive correlation between midday canopy light interception and Kc in apple and pear trees, in different times within a specific year, these relationships were different between crops. While the apple data fitted into the same equation regardless of the year, different equations were needed to fit the pear data in different years. This discrepancy may have been related to differences in the canopy properties between apple and pear trees. Pear canopies had higher porosity than apple canopies and thus improved light penetration. Apple trees were more vigorous and produced taller and denser canopies. Pear Kc values were greatly influenced by the evaporative demands of different years and consequently differences in midday canopy light interception did not adequately reflect the differences in Kc across the two species. Springer-Verlag, 2010 Girona Joan Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut del Campo Jesus Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut Mata Merce Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut Lopez Gerardo Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut Marsal Jordi Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut Irrigation Science Springer-Verlag 29/1(2011-01-01), 55-63 0342-7188 29:1<55 2011 29 271 https://doi.org/10.1007/s00271-010-0217-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00271-010-0217-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Girona Joan Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut NATIONALLICENCE 700 1- del Campo Jesus Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut NATIONALLICENCE 700 1- Mata Merce Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut NATIONALLICENCE 700 1- Lopez Gerardo Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut NATIONALLICENCE 700 1- Marsal Jordi Irrigation Technology, Institut de Recerca i Tecnologia Agroalimentaries (IRTA), Centre UdL-IRTA, Av Rovira Roure 191, 25198, Lleida, Spain aut NATIONALLICENCE 773 0- Irrigation Science Springer-Verlag 29/1(2011-01-01), 55-63 0342-7188 29:1<55 2011 29 271 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer