Development of elements of olive (Оlea europea L.) propagation technology in the conditions of the vegetation module

Crimea is one of the few regions of our country, which has a mild subtropical climate and historical traditions, and the most favorable conditions for cultivation of olive (Olea europaea L.) To develop this crop, planting material must be produced from the most adapted varieties. Rooting cuttings during the vegetative propagation of olives is a slow process because olives are hard-to-root crops. The aim of the study was to develop methods to increase the rootability of European olive cuttings. Various humidity and temperature regimes, the use of indolyl butyric acid (IBA), and different substrate compositions were studied in the conditions of the vegetation module. Three temperature regimes were tested: +15°C, +20°C, and +25°C. Within each temperature regime, three humidity levels were tested: 80%, 85% and 90%. Each temperature and humidity level included options with and without IBA treatment. The repetition is fivefold, with 20 cuttings per repetition. The effect of various substrate compositions on the rootability of olive cuttings in the vegetation module was also studied. All the factors studied–temperature regime, humidity level, substrate composition and treatment with BMI solutions–had a significant effect on cutting safety, budding, and rooting. The effect of the temperature regime on the rootability of cuttings depended on the air humidity. At a relatively low temperature of +15°C, the rootability decreased slightly with increasing air humidity. At +20°C, the optimal humidity level was 85%. At +25°C, a higher rooting rate was observed at higher air humidity levels. The highest rooting percentage was found in the variant using BMI at a temperature of +25°C with 85% humidity. Cuttings that were rooted in a vegetation module with an optimal substrate composition (peat and coconut substrate at a ratio of 1:1) exhibited accelerated growth when grown in protected soil conditions. This made it possible to rapidly obtain seedlings that met the standard.

1. Sholokhova V.A. Recommendations on laying industrial plantations of olives and care for them. Moscow, USSA: Kolos, 1984:38. (In Russ.)

2. Kazas A.N., Litvinova T.V., Myazina L.F., Sino L.T. et al. Subtropical fruit and nut crops: reference publication. Simferopol, Ukraine: Arial, 2012:304. (In Russ.)

3. Radjabov A.K., Ryndin A.V., Kelina V.V. Subtropical horticulture: a textbook. Moscow, Russia: Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, 2016:218. (In Russ.)

4. Guerrero Maldonado N., López M.J., Caudullo G., de Rigo D. Olea europaea in Europe: Distribution, Habitat, Usage and Threats. In: San-Miguel-Ayanz J., de Rigo D., Caudullo G., Durrant T.H. et al. (Eds.) European Atlas of Forest Tree Species. Luxembourg: Publ. Off. EU. 2016: e01534b+. URL: https://forest.jrc.ec.europa. eu/media/atlas/Olea_europaea.pdf

5. Tsiupka S.Yu. The cultivation of planting material. Sbornik nauchnykh trudov Gosudarstvennogo Nikitskogo botanicheskogo sada. 2017;144(2):100-105. (In Russ.)

6. Wiesman Z., Lavee S. Relationship of Carbohydrate Sources and Indole-3-butyric Acid in Olive Cuttings. Aust. J. Plant Physiol. 1995;22:811-816.

7. Hechmi M., Khaled M., Abed S. El-Hassen A. et al. Performance of Olive Cuttings (Olea europaea L.) of DifferentCultivars Growing in theAgro-climaticConditions of Al-Jouf (Saudi Arabia). American Journal of Plant Physiology. 2013;8:41-49. http://doi.org/10.3923/ajpp.2013.41.49

8. Zhuraev E.B., Abdullayev S.B.U., Buriev Kh.Ch. Effect of growth regulators on the quality of rooting cuttings and development of olive (Olea europea L.) seedlings. Molodoy ucheniy. 2018;39(225):54-57. (In Russ.)

9. Myazina L.F., Shishkina E.L. Vegetative reproduction of the european olive (Olea europea L.) varieties in different conditions. Selektsiya i sortorazvedenie sadovykh kultur. 2018;5(1):76-79. (In Russ.)

10. Ullah M.A., Aamir S.S., Yasir M., Ali S. Olive cuttings survival influences with saline water irrigation. Horticult Int J. 2018;2(6):408-411. http://doi.org/10.15406/hij.2018.02.00086

11. Schuch M.W., Tomaz Z.F.P., Casarin J.V., Moreira R.M. et al. Advances in vegetative propagation of olive tree. Revista Brasileira de Fruticultura. 2019;41(2): e-003. http://doi.org/10.1590/0100-29452019003

12. Ayaz N., Aman F., Saleem S., Rehman M. et al. Olive Cuttings as Affected by Different Concentrations of Indole Butyric Acid. Sarhad Journal of Agriculture. 2021;37(1):146-151 https://doi.org/10.17582/journal.sja/2021/37.1.146.151

13. Mammadov J., Javadova A. Effect of Various Preparation for Plant Rooting on Olive Cuttings. Bulletin of Science and Practice. 2024;10(10):210-216. https://doi.org/10.33619/2414-2948/107

14. Kir A. Plant residue based compost can replace peat in growing media for organically grown olive tree sapling in Mediterranean climates. Biological Agriculture & Horticulture. 2025:1-18. https://doi.org/10.1080/01448765.2024.2448445.