The effects of row orientation, tree height, time of year and latitude on light interception and distribution in model apple hedgerow canopies
- 1 January 1989
- journal article
- research article
- Published by Taylor & Francis in The Journal of Horticultural Science and Biotechnology
- Vol. 64 (2), 137-145
- https://doi.org/10.1080/14620316.1989.11515937
Abstract
A computer model was used to calculate light interception and distribution within apple hedgerow canopies at different times of the year, at row spacings of 2, 3 and 4 m, at latitudes of 51.3, 40 and 30°N, for tree heights from 0.5–4 m, with row orientation N–S or E–W and at constant leaf area density. The effect of row orientation was complex and depended on the other factors. In mid-summer, N–S rows intercepted more light than E–W rows with larger differences at lower latitudes and at the wider spacings. At the equinox, E–W rows intercepted more light than N–S rows at higher latitudes Iput there was little difference at 30°N. Light interception was not affected by row orientation when hedge height was less than 1 m, or at 2 m row spacing on days with low solar altitudes. Light distribution was improved with wider spacings in N–S rows, but this was only the case for E–W rows when solar altitudes were low. Light distribution was better in N–S rows in mid-summer at the time of floral initiation but this was reversed at 51.3°N at the equinoxes.This publication has 11 references indexed in Scilit:
- Light Interception and Radiative Exchange in Crop StandsPublished by Wiley ,2015
- Light interception and distribution in horizontal and vertical canopies of red raspberriesThe Journal of Horticultural Science and Biotechnology, 1987
- Light Distribution in Discontinuous Canopies: Calculation of Leaf Areas and Canopy Volumes Above Defined ‘Irradiance Contours’ for use in Productivity ModellingAnnals of Botany, 1981
- A computer model study of light interception by orchards in relation to mechanised harvesting and managementScientia Horticulturae, 1980
- Effects of density, rectangularity and row orientation on apple trees, measured in a multiv ariated experimental designScientia Horticulturae, 1979
- Climate and the efficiency of crop production in BritainPhilosophical Transactions of the Royal Society of London. B, Biological Sciences, 1977
- Diurnal Light Interception and a Computer Model of Light Interception by Hedgerow Apple OrchardsJournal of Applied Ecology, 1977
- Seasonal Light Interception and Canopy Development in Hedgerow and Bed System Apple OrchardsJournal of Applied Ecology, 1977
- Interception of Diffuse and Direct-beam Radiation by a Hedgerow Apple OrchardAnnals of Botany, 1976
- The Morphogenesis of Apple BudsAnnals of Botany, 1965