Effect of different irrigation and fertilization rates on the yield of three tomato genotypes grown in greenhouse conditions

  • 1 Institute of Soil Science, Agrotechnology and Plant Protection “Nikola Poushkarov” – Sofia
  • 2 Institute of Vegetable Crops "Maritsa“, Plovdiv


In order to determine the influence of different rates of irrigation and fertilization on the growth, yield, and some yield-related characteristics of three genotypes of tomatoes, research was carried out at IVCM – Plovdiv in an unheated steel-glass greenhouse of the “Venlo” type. The experiment was carried out with three modes of irrigation: optimal – 100%, reduced – 75%, and increased – 125%, using water-saving irrigation technologies and three modes of fertilization – optimal – 100%, reduced – 75%, and increased fertilization – 150%. The amount of watering and irrigation norms, the number of waterings for the growing season of greenhouse tomatoes were determined based on soil type, and climatic conditions in the region of Plovdiv. An optimal or high irrigation rate combined with reduced or optimal fertilization leads to maximum yields in all three tomato varieties. A specific reaction of the variety was observed – in “Hayet” and “Pink rock ”varieties, maximum yields (14.1 t/ha and 8.8 t/ha) were obtained in the variants with 100%/75%, while in the “Malduo” variety, the highest yield was obtained (8.6 t/ha) in the variant with 125%/100%, irrigation/fertilizer rate. In the three studied varieties of tomatoes, the lowest yield was reported when the irrigation rate was reduced by 25%, which shows that the reduction of the irrigation rate by 25% is within the limits of the critical, while the reduction of the fertilizer rate by 25% is permissible.



  1. Aboamera M. 1992.Irrigation Regime and Technology for Growing Some Vegetables in Unheated Plastic Greenhouses with Drip Irrigation, Dissertation, Sofia, 1992, pp 28-39.
  2. Ganeva D., S. Grozeva, G. Pevicharova, 2019. Effect of reduced irrigation on flowering, fruit set and yield of indeterminate
  3. Grozeva S., D. Ganeva, G. Pevicharova, 2018. Influence of reduced irrigation on phenological and morphological characters of different tomato genotypes. Agriculture & Food, 6: 111-121.
  4. Grozeva, G. Pevicharova, 2018. Evaluation of productivity and productivity compounds in tomato accessions grown under elevated temperature and reduced irrigation. Agriculture & Food, 6: 99-110.
  5. Delibaltov J., etc. Irrigation of agricultural crops, Zemizdat, Sofia, 1972. pp. 79-90.
  6. Kireva, R. Irrigated regimes of vegetable crops, 2020. Monograph, p. 166. ed. Avangard Prima, Sofia, 2020, ISSN978- 619-239-435-6.
  7. Kireva R., M. Aboamera, Drip irrigation of early and mid-early tomatoes in plastic unheated greenhouses, magazine Vodno delo, 1991, issue 5, p.15-17 KirevaR.2009. Irrigation regime of vegetable crops grown under drip irrigation in the area of Sofia field, Sofia, magazine Selskostopanska tekhnika, issue 6/2009. Pages 2-8, ISSN 003-1718.
  8. Kireva R., 2020. Irrigation Regime of Tomatoes Grown in Greenhouses Using Environmentally Friendly and Water-saving. Irrigation Techniques. Journal of Balkan Ecology, vol. 23, No. 1, p.39-45, ISSN1311-0527, (print), Mitova, I., & Dinev, N. (2017). Development of agriculture, conventional and/or organic. Sustainable. Ed. "East-West", (p. 168 Mitova Iv., Hr. Stoikov, 2008. Climate conditions and phosphorus norm as factors for the absorption of the main nutrients from tomato plants. Seventh International Symposium "Ecology-Sustainable Development", 23 - 25. 10.
  9. Stoyanova An., G. Kostadinov, M.Moteva,2020, Influence of the controlled water deficit at different levels of fertilization on the yield of greenhouse tomatoes, Bulgarian Journal of Agricultural Science, 26 (Suppl. 1) 2020, 9-18
  10. Stoyanova, A., Kuneva, V., Valchev, N. (2019). SurveyOf The Influence Of Fertilization And Irrigation InThe Tomatoes, Greenhouse Production. Scientific Papers. Series B, Horticulture, LXIII(1). Selyaninov, G. (1958). On agricultural climateassessment. Proceedings of agricultural meteorology,
  11. Frecman B., Carzoli. 1980. Localized Irrigation. – FAO, Irrigation and Drainage, 36-4

Article full text

Download PDF