Articles
Trend of optimal temperatures for carbohydrate synthesis and vegetative growth of olive trees in Protected Designations of Origin in Extremadura, Spain
Article number
1457_67
Pages
541 – 548
Language
English
Abstract
Climate is considered to be one of the most influential factors in the correct development of crops and in the formation of their fruit, and therefore in their processed products.
The study based on bioclimatic variables and indices, together with the orography of a territory, makes it possible to differentiate it, highlighting the particularity of each production area.
This study shows the tendency of bioclimatic variables during the olive production cycle in the three Protected Designations of Origin (PDO) of olive oil in Extremadura (49,000 ha), Villuercas Ibores Jara (average altitude of 519 m), Gata-Hurdes (average altitude of 437m), and Monterrubio (average altitude of 387m). For this purpose, the average daily temperatures between 20°C and 30°C and between 10 and 30°C were obtained from the climatic stations located in the PDOs, calculating the number of days with optimal temperatures for the carbohydrates in leaves (NDCHS) and the number of days of vegetative growth (NDVG) respectively, during the phases of the olive tree production cycle (March-November) in the period between 1990 and 2021. The results showed an annual average of 103, 108, and 116 days for NDCHS and 258, 271, and 279 days for NDVG in the period studied for the PDOs Villuercas Ibores Jara, Gata-Hurdes, and Monterrubio, respectively.
The Mann-Kendall test showed a decreasing slope trend of -0.11 and -0.05 for NDCHS and NDVG, respectively, in the Gata-Hurdes PDO region.
In the Monterrubio PDO, slope values increased, with 0.50 and 0.20 for NDCHS and NDVG, respectively.
Only the PDO of Villuercas Ibores Jara showed significant values for NDCHS, with a positive increase of 0.39 in the slopes; the value for NDVG was 0.21. The conclusion is that both indices experienced an average annual increase during the studied period.
The study based on bioclimatic variables and indices, together with the orography of a territory, makes it possible to differentiate it, highlighting the particularity of each production area.
This study shows the tendency of bioclimatic variables during the olive production cycle in the three Protected Designations of Origin (PDO) of olive oil in Extremadura (49,000 ha), Villuercas Ibores Jara (average altitude of 519 m), Gata-Hurdes (average altitude of 437m), and Monterrubio (average altitude of 387m). For this purpose, the average daily temperatures between 20°C and 30°C and between 10 and 30°C were obtained from the climatic stations located in the PDOs, calculating the number of days with optimal temperatures for the carbohydrates in leaves (NDCHS) and the number of days of vegetative growth (NDVG) respectively, during the phases of the olive tree production cycle (March-November) in the period between 1990 and 2021. The results showed an annual average of 103, 108, and 116 days for NDCHS and 258, 271, and 279 days for NDVG in the period studied for the PDOs Villuercas Ibores Jara, Gata-Hurdes, and Monterrubio, respectively.
The Mann-Kendall test showed a decreasing slope trend of -0.11 and -0.05 for NDCHS and NDVG, respectively, in the Gata-Hurdes PDO region.
In the Monterrubio PDO, slope values increased, with 0.50 and 0.20 for NDCHS and NDVG, respectively.
Only the PDO of Villuercas Ibores Jara showed significant values for NDCHS, with a positive increase of 0.39 in the slopes; the value for NDVG was 0.21. The conclusion is that both indices experienced an average annual increase during the studied period.
Publication
Authors
F. Honorio, C. Aguirado, L.L. Paniagua, A. García-Martín, L. Rebollo, F.J. Rebollo
Keywords
optimal temperatures for the carbohydrates in leaves (NDCHS), number of days of vegetative growth (NDVG), Villuercas Ibores Jara, Gata-Hurdes, Monterrubio
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