Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Record number 538842
Title Leaf area estimation by considering leaf dimensions in olive tree
Author(s) Koubouris, Georgios; Bouranis, Dimitris; Vogiatzis, Efraim; Nejad, Abdolhossein Rezaei; Giday, Habtamu; Tsaniklidis, Georgios; Ligoxigakis, Eleftherios K.; Blazakis, Konstantinos; Kalaitzis, Panagiotis; Fanourakis, Dimitrios
Source Scientia Horticulturae 240 (2018). - ISSN 0304-4238 - p. 440 - 445.
Department(s) Horticulture and Product Physiology Group
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Leaf length - Leaf shape - Leaf size - Leaf width - Nondestructive methods - Olea europaea
Abstract Area (LA) estimation, based on individual leaf dimensions [length (L) and width (W)], was addressed in olive tree. Ten cultivars exposed to two watering regimes (irrigated versus rainfed) under field conditions were examined. Petiole length, leaf L, W, perimeter, base and apex angles, four shape indicators, together with LA were digitally assessed in fully-expanded leaves (480 leaves per treatment; 9.600 leaves in total). Large cultivar differences mainly in leaf size and secondarily in leaf shape were apparent. All parameters were affected by water deficit, but to a cultivar dependent extent. Leaf size was generally reduced by lack of irrigation in most cultivars. LA was estimated with higher accuracy by employing L alone, as compared to W alone, in eight cultivars. LA estimation was always improved by considering both L and W simultaneously, as compared to a single dimension. By studying each cultivar individually, LA estimation was within accepted limits (0.71 ≤ R2 ≤ 0.92) in nine cultivars, whereas in the tenth one a moderate R2 (0.63) was obtained. The accuracy of this estimation was not improved by pooling the data of all cultivars. Watering did not significantly affect the relation between estimated and measured LA. The obtained data indicate that a universal LA estimation model for olive tree carries the pitfall of moderate accuracy, owing only to cultivar differences, since environmental effects were trivial.
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