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.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 497364
Title A dynamic model of potential growth of olive (Olea europaea L.) orchards
Author(s) Morales Sierra, Alejandro; Leffelaar, Peter A.; Testi, Luca; Orgaz, Francisco; Villalobos, Francisco J.
Source European Journal of Agronomy 74 (2016). - ISSN 1161-0301 - p. 93 - 102.
Department(s) Crop Physiology
Plant Production Systems
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Climate change - Crop model - Maespa - Photosynthesis - Radiation use efficiency - Super-high density

A model of potential olive oil production is presented, based on a three-dimensional model of canopy photosynthesis and respiration and dynamic distribution of assimilates among organs. The model is used to analyse the effects of planting density (high and super-high density orchards with 408 and 1667 treesha-1, respectively) and climate change (δT of 4°C and CO2 concentration of 740ppm) on olive oil production. To evaluate its predictive power, the simulations were tested with published measurements of leaf area, growth and yield for a high density olive orchard cv. 'Arbequina' in Cordoba, Spain. The model slightly overestimated (less than 7%) the different measurements reported in the experiment. For all simulations, the maximum yields obtained were in agreement with literature. Simulations showed that climate change had a very small effect on yields due to compensation of the negative and positive effects of temperature and CO2 on photosynthesis and respiration. However, high temperatures led to some sterile years due to lack of vernalization. The model predicts that super-high density olive orchards achieve higher potential yields than high-density systems and that maximum yields are reached on the third year of the orchard. The advantage of a higher density is a higher interception of solar radiation, especially during the first years of the orchard. In all the simulations, the model predicted a small decrease of the radiation use efficiency for oil production with the age of the orchard as well as an important inter-annual variability (range of 0.11-0.19g (MJ PAR)-1), indicating that the use of a constant radiation use efficiency may not be adequate to predict oil production.

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