Influence of different rates of irrigation and fertilization on the quality indicators of the fruits of three genotypes of greenhouse tomatoes

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


To establish the influence of different irrigation and fertilization rates on the quality indicators of the fruit of three specific genotypes of tomatoes- Maldo, Pink Rock, and Hayet- in 2022, experiments were conducted in the experimental field of Maritza Vegetable Crop Research Institute – Plovdiv in an unheated steel and glass greenhouse type Venlo. The experiment was conducted under three irrigation regimes – optimal, reduced, and increased irrigation – 100%, 75%, and 125% using water-saving irrigation technologies and three fertilization regimes – optimal, reduced, and increased fertilization – 100%, 75%, and 150%.
It was found that reducing the water content resulted in a slight increase in dry matter, total soluble solids (TSS), and vitamin C content while varying the fertilizer rate did not significantly change the studied characteristics. Tomato fruit quality was more affected by irrigation than by fertilizer levels. Titratable acidity and pH differed between cultivars but not between treatments applied. The highest dry matter, TSS, and vitamin C contents were observed in the treatments with low irrigation rates and optimal fertilization (75%W and 100%F). Strong positive correlations were found between dry matter, TSS and vitamin C, while a strong negative correlation was found between fruit firmness and dry matter, TSS and vitamin C.
The factor Genotype had the strongest effect on the tomato fruit quality parameters studied, with a weaker but proven effect of the individual factors irrigation rate and fertilization rate on dry matter, soluble solids content, and vitamin C. The highest fruit quality was found in Pink Rock, followed by Maldo. The variety with the lowest values for most of the quality indicators is Hayet.



  1. - - Yordanov M.,I. Manuelyan Problems of Modern Vegetable Production, ed. 49-58 Plovdiv, 1980.
  2. - - Ganeva D., S. Grozeva, G. Pevicharova, 2019. Effect of reduced irrigation on flowering, fruit set and yield of indeterminate tomato. International Journal of Recent Technology and Engineering, 8(2S4): 932-936.
  3. - - Stoyanova Ann.,G. Kostadinov, M. Moteva,2020, Effect of controlled water deficit at different fertilization levels on greenhouse tomato yield, Bulgarian Journal of Agricultural Science, 26 (Suppl. 1) 2020, 9-18Ritsema, H.; Huang, X.; Bai, X.; Hellegers, P. Assessing water and fertilizer practices and perceptions of farmers in the North China Plain. irrigation Drain. 2022, 71, 980–996. [Google Scholar] [CrossRef]
  4. - Bai, C.; Zuo, J.; Watkins, CB; Wang, Q.; Liang, H.; Zheng, Y.; Liu, M.; Ji, Y. Sugar accumulation and fruit quality of tomato under water deficit irrigation. Postharvest Biol. technical 2023 , 195 , 112112. [Google Scholar] [CrossRef]
  5. - Alordzinu, K.E.; Appiah, SA; Al Aasmi, A.; Darko, RO; Li, J.; Lan, Y.; Adjibolosoo, D.; Lian, C.; Wang, H.; Qiao, S.; and others. Evaluation of the impact of deficit irrigation on fruit yield and quality indicators of tomatoes grown in sandy-clay and silt-clay soils. Water 2022 , 14 , 1753. [Google Scholar] [CrossRef]
  6. - Paul, W. Prospects for controlled water and fertilizer application based on soil permeability sensing. Calc. Electron. Agric. 2002, 36, 151–163. [Google Scholar] [CrossRef]
  7. - Del Amor, F.M., Martinez, V. and Cerda, A. (2001). Salt tolerance of tomato plants as affected by stage of plant development. Hort Science. 36(7): 1260-1263.
  8. - Wang, X. and Xing, Y. (2017). Evaluation of the effects of irrigation and fertilization on tomato fruit yield and quality: A principal component analysis. Scientific Reports. 7(1): 350.
  9. - Favati, F., Lovelli, S., Galgano, F., Miccolis, V., Tommaso, T.D. & Candido, V. (2009). Processing tomato quality asaffected by irrigation scheduling. Scientia Horticulturae. 122 (4), 562-571
  10. - Li, Y., Sun, Y., Liao, S., Zou, G., Zhao, T., Chen, Y., Yang, J.& Zhang, L. (2017). Effects of two slow-release nitrogenfertilizers and irrigation on yield, quality, and water-fertilizer productivity of greenhouse tomato. Agricultural Water
  11. - Marouelli, W., Silva, WLC. (2007). Water tension thresholdsfor processing tomatoes under drip irrigation in CentralBrazil. Irrigation Science 25(4), 411-418.

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