Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress
The transversal fruit diameter (FD) was monitored continuously by automatic extensimeters (fruit gauges) in order to monitor fruit growth dynamics under deficit irrigation treatments. The daily diameter fluctuation (ΔD, mm), the daily growth (ΔG, mm), the cumulative fruit growth (CFG, mm), and the f...
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MDPI AG
2022-12-01
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| Series: | Horticulturae |
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| Online Access: | https://www.mdpi.com/2311-7524/8/12/1221 |
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| author | Arash Khosravi Matteo Zucchini Adriano Mancini Davide Neri |
| author_facet | Arash Khosravi Matteo Zucchini Adriano Mancini Davide Neri |
| author_sort | Arash Khosravi |
| collection | DOAJ |
| description | The transversal fruit diameter (FD) was monitored continuously by automatic extensimeters (fruit gauges) in order to monitor fruit growth dynamics under deficit irrigation treatments. The daily diameter fluctuation (ΔD, mm), the daily growth (ΔG, mm), the cumulative fruit growth (CFG, mm), and the fruit relative growth rate (RGR, mm mm<sup>−1</sup> h<sup>−1</sup>) of four olive cultivars (Ascolana dura, Piantone di Falerone, Arbequina, and Lea) were studied during the third phase of fruit growth. Two regulated deficit irrigation treatments DI-20 (20% of ET<sub>c</sub>) and DI-10 (10% of ET<sub>c</sub>) were applied. The daily hysteretic pattern of FD versus the environmental variable of vapor pressure deficit (VPD) was evaluated using the data of a local weather station. The assessment of fruit growth parameters showed cultivar-specific response to water stress. For instance, after performing deficit irrigation, minimum RGR in different cultivars downsized with various slopes which suggested a very different response of the cultivars to dehydration. On the other hand, the daily hysteretic pattern of FD versus VPD was detected in all the studied cultivars, and a quantitative index (height of hysteresis curves) used for explanation of hysteresis magnitude’s changed according to the deficit irrigation treatments. The results showed a significant reduction of height of hysteresis curves by irrigation treatments which were not cultivar-specific. The quantitative index for hysteresis curve magnitude’s change in the four olive cultivars of Ascolana dura, Piantone di Falerone, Arbequina and Lea can efficiently estimate the plant water response to irrigation treatment in olive orchards. However, further investigation needs to be done to implement precise irrigation systems. |
| first_indexed | 2024-03-09T16:20:21Z |
| format | Article |
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| issn | 2311-7524 |
| language | English |
| last_indexed | 2024-03-09T16:20:21Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Horticulturae |
| spelling | doaj.art-0e191c091c9b44088f138754e7c4612c2023-11-24T15:16:45ZengMDPI AGHorticulturae2311-75242022-12-01812122110.3390/horticulturae8121221Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water StressArash Khosravi0Matteo Zucchini1Adriano Mancini2Davide Neri3Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, 60131 Ancona, ItalyDepartment of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, 60131 Ancona, ItalyDepartment of Information Engineering, Marche Polytechnic University, 60131 Ancona, ItalyDepartment of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, 60131 Ancona, ItalyThe transversal fruit diameter (FD) was monitored continuously by automatic extensimeters (fruit gauges) in order to monitor fruit growth dynamics under deficit irrigation treatments. The daily diameter fluctuation (ΔD, mm), the daily growth (ΔG, mm), the cumulative fruit growth (CFG, mm), and the fruit relative growth rate (RGR, mm mm<sup>−1</sup> h<sup>−1</sup>) of four olive cultivars (Ascolana dura, Piantone di Falerone, Arbequina, and Lea) were studied during the third phase of fruit growth. Two regulated deficit irrigation treatments DI-20 (20% of ET<sub>c</sub>) and DI-10 (10% of ET<sub>c</sub>) were applied. The daily hysteretic pattern of FD versus the environmental variable of vapor pressure deficit (VPD) was evaluated using the data of a local weather station. The assessment of fruit growth parameters showed cultivar-specific response to water stress. For instance, after performing deficit irrigation, minimum RGR in different cultivars downsized with various slopes which suggested a very different response of the cultivars to dehydration. On the other hand, the daily hysteretic pattern of FD versus VPD was detected in all the studied cultivars, and a quantitative index (height of hysteresis curves) used for explanation of hysteresis magnitude’s changed according to the deficit irrigation treatments. The results showed a significant reduction of height of hysteresis curves by irrigation treatments which were not cultivar-specific. The quantitative index for hysteresis curve magnitude’s change in the four olive cultivars of Ascolana dura, Piantone di Falerone, Arbequina and Lea can efficiently estimate the plant water response to irrigation treatment in olive orchards. However, further investigation needs to be done to implement precise irrigation systems.https://www.mdpi.com/2311-7524/8/12/1221<i>Olea europaea</i> L.fruit diameterhysteresisdeficit irrigationvapor pressure deficit (VPD)water stress index |
| spellingShingle | Arash Khosravi Matteo Zucchini Adriano Mancini Davide Neri Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress Horticulturae <i>Olea europaea</i> L. fruit diameter hysteresis deficit irrigation vapor pressure deficit (VPD) water stress index |
| title | Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress |
| title_full | Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress |
| title_fullStr | Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress |
| title_full_unstemmed | Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress |
| title_short | Continuous Third Phase Fruit Monitoring in Olive with Regulated Deficit Irrigation to Set a Quantitative Index of Water Stress |
| title_sort | continuous third phase fruit monitoring in olive with regulated deficit irrigation to set a quantitative index of water stress |
| topic | <i>Olea europaea</i> L. fruit diameter hysteresis deficit irrigation vapor pressure deficit (VPD) water stress index |
| url | https://www.mdpi.com/2311-7524/8/12/1221 |
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