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Plant Science Today (PST)

Research Articles

Early Access

Effect of potassium spraying and spraying dates on some growth, yield and chemical traits of tomato cv. Polonia

DOI
https://doi.org/10.14719/pst.11040
Submitted
1 August 2025
Published
26-11-2025

Abstract

This study was performed during the 2022 cropping season in the experimental fields of the Horticulture Department, College of Agriculture, University of Anbar, to examine the effects of foliar potassium (K) concentrations and application schedules on tomato growth, yield and quality of fruit. Tomato saplings (Polonia cv.) were transplanted to the open area and the experiment was structured in a randomized complete block design (RCBD) with three replications. Two factors were explored: five K doses (0, 1000, 2000, 3000 and 4000 mg L-¹) and three application timelines (10, 21 and 42 days post-transplanting). The research assumes that foliar application of potassium at advanced concentrations and proper spraying times can effectively improve vegetative growth, yield factors and chemical traits of tomato plants. This hypothesis handles  a critical comprehension gap in insight the association between potassium supply and plant physiological reactions under the agro-ecological environments of Iraq. Furthermore, confirming or refusing this hypothesis has practical significance for green agriculture, as it supplies executable guidance for enhancing both yield and economic returns in tomato yield. The results revealed that the treatment K2 (2000 mg L-¹) significantly improved height of plant and leaf area, while K4 (4000 mg L-¹) enhanced dry weight, flowers number, yield of fruit and leaf potassium content. Spraying at S3 (42 days after replanting) significantly raised most traits of growth and yield. The interaction of potassium treatment and applying schedule disclosed that K4S3 and K2S3 treatments achieved the highest values for the studied traits. These findings highlight the originality and significance of the research, illustrating that a carefully enhanced potassium application strategy, combined with proper applying schedules, can immediately enhance tomato productivity and quality of fruit. generally, this study provides both scientific perceptions into nutrient–plant relations and practical guidance for enhancing farmers’ yields and gainfulness in fresh market and managing tomato production systems.

References

  1. 1. Ali MY, Sina AAI, Khandker SS, Neesa L, Tanvir EM, Kabir A, et al. Nutritional composition and bioactive compounds in tomatoes and their impact on human health and disease: A review. Foods. 2020;10(1):45. https://doi.org/10.3390/foods10010045
  2. 2. Erika C, Griebel S, Naumann M, Pawelzik E. Biodiversity in tomatoes: Is it reflected in nutrient density and nutritional yields under organic outdoor production. Front Plant Sci. 2020;11:589692. https://doi.org/10.3389/fpls.2020.589692
  3. 3. Marx-Pienaar NJMM, Erasmus AC. Status consciousness and knowledge as potential impediments of households’ sustainable consumption practices of fresh produce amidst times of climate change. Int J Consum Stud. 2014;38(4):419–26. https://doi.org/10.1111/ijcs.12111
  4. 4. Egea I, Estrada Y, Flores FB, Bolarín MC. Improving production and fruit quality of tomato under abiotic stress: Genes for the future of tomato breeding for a sustainable agriculture. Environ Exp Bot. 2022;204:105086. https://doi.org/10.1016/j.envexpbot.2022.105086
  5. 5. Hasanuzzaman M, Bhuyan MHMB, Nahar K, Hossain MS, Mahmud JA, Hossen MS, et al. Potassium: A vital regulator of plant responses and tolerance to abiotic stresses. Agronomy. 2018;8(3):31. https://doi.org/10.3390/agronomy8030031
  6. 6. Onisile AT, Babarinde TO, Iyiola AT, Oluwole OF, Aremu WT, Nwafor IP. Effect of potassium fertilizer rate on growth, fruit yield and nutritional quality of tomato varieties (Lycopersicon lycopersicum) in Ogbomoso, Oyo State, Nigeria. Int J Res Publ Rev. 2025; 6(4):14752–772. https://doi.org/10.55248/gengpi.6.0425.16148
  7. 7. Bidari B, Hebsur N. Potassium in relation to yield and quality of selected vegetable crops. Karnataka J Agric Sci. 2011;24(1):55–59. https://doi.org/10.20546/ijcmas.2019.804.074
  8. 8. Daoud B, Pawelzik E, Naumann M. Different potassium fertilization levels influence water-use efficiency, yield and fruit quality attributes of cocktail tomato-A comparative study of deficient-to-excessive supply. Scientia Horticulturae. 2020;272:109562. https://doi.org/10.1016/j.scienta.2020.109562
  9. 9. Liu J, Hu T, Feng P, Wang L, Yang S. Tomato yield and water use efficiency change with various soil moisture and potassium levels during different growth stages. PLOS One. 2019; 14(3):e0213986. https://doi.org/10.1371/journal.pone.0213643
  10. 10. Song J, Zhang R, Fu B, Chen H, Song X, Lv G, et al. Effects of potassium supply in nutrient solution on water and nutrient absorption of substrate-grown tomato plants. Horticulturae. 2025;11(6):629. https://doi.org/10.3390/horticulturae11060629
  11. 11. San-Martín-Hernández C, Trejo-Téllez LI, Gómez-Merino FC, Volke-Haller VH, Escalante-Estrada JA, Sánchez-García P, et al. Nitrogen and potassium nutrition differentially affect tomato biomass and growth. Interciencia. 2016;41(1):60–66.
  12. 12. Al-Jaf IHM. Study of genetic diversity for some cucumber varieties using molecular genetic techniques and genetic behavior for their hybrids as affected by potassium. [PhD dissertation]. College of Agriculture, University of Baghdad. 2017.
  13. 13. Ravat AL, Patil K, Acharya RR, Ashokbhai PN. Effect of foliar spray of different micronutrients on plant growth, seed yield and quality in tomato. Seed Res. 2023;51(2):112–15. https://doi.org/10.56093/sr.v52i2.163013
  14. 14. Adekiya AO, Adebiyi OV, Ibaba AL, Aremu C, Ajibade RO. Effects of wood biochar and potassium fertilizer on soil properties, growth and yield of sweet potato (Ipomoea batata). Heliyon. 2022;8:e11728. https://doi.org/10.1016/j.heliyon.2022.e11728
  15. 15. Patil P, Biradar P, Bhagawathi AU, Hejjegar IS. A review on leaf area index of horticulture crops and its importance. Int J Curr Microbiol Appl Sci. 2018;7(4):505–13. https://doi.org/10.20546/ijcmas.2018.704.059 ‏
  16. 16. Katsenios N andreou V, Sparangis P, Djordjevic N, Giannoglou M, Chanioti S, et al. Evaluation of plant growth promoting bacteria strains on growth, yield and quality of industrial tomato. Microorganisms. 2021;9(10):2099. https://doi.org/10.3390/microorganisms9102099
  17. 17. Tang Q, Li Z, Chen N, Luo X, Zhao Q. Natural pigments derived from plants and microorganisms: Classification, biosynthesis and applications. Plant Biotechnol J. 2025;23(2):592–614. https://doi.org/10.1111/pbi.14522
  18. 18. Jones JB. Laboratory guide for conducting soil tests and plant analysis. CRC Press. 2001. https://doi.org/10.1201/9781420025293
  19. 19. Richards LA. Diagnosis and improvement of saline and alkali soils. U.S. Department of Agriculture. Agricultural Handbook No. 60. 1954:7–53.
  20. 20. Al-Mehmedi S, Al-Mehmedi MFM. Statistics and Experimental Design. Amman, Jordan: Dar Usama for Publishing and Distributing. 2012. p. 376.
  21. 21. Wu C, Han X, Cheng Y, Wang X, Wang W. Impact of “3414” fertilization on the yield and quality of greenhouse tomatoes. Open Life Sci. 2024;19(1):20220893. https://doi.org/10.1515/biol-2022-0893
  22. 22. Vasileva V, Mitova I. Analyzing the effects of potassium fertilization on the yield and total N, K₂O and P₂O₅ export of tomato plants. J Cent Eur Agric. 2023;24(1):282–90. https://doi.org/10.5513/JCEA01/24.1.3744
  23. 23. Filho MNC, Melo LCA, Lustosa Filho JF, de Castro Paes É, de Oliveira Dias F, Gomes JL, et al. Improved tomato development by biochar soil amendment and foliar application of potassium under different available soil water contents. J Plant Nutr. 2024;47(16):2620–44. https://doi.org/10.1080/01904167.2024.2354214
  24. 24. Han Q, Jiang W, Yu H, Wang M. Effects of potash applied at different growth phases on tomato yield and quality in greenhouse. Acta Hortic. 2012;944:45–49. https://doi.org/10.17660/ActaHortic.2012.944.5
  25. 25. Navitha D, Mahendran PP, Suresh S, Beaulah A, Kannan P. Growth and yield of tomato as influenced by potassium and secondary nutrients. Int J Chem Stud. 2019;7(5):683–88.
  26. 26. Abd-El-Hamied AS, Abd El-Hady MA. Response of tomato plant to foliar application of calcium and potassium nitrate integrated with different phosphorus rates under sandy soil conditions. Egypt J Soil Sci. 2018;58(1):45–55. https://doi.org/10.21608/ejss.2017.1645.1126
  27. 27. Al-Mosuli MAD, Al-Badrani WA, Hassan FAS, Al-Rashidi SM. Plant nutrition: Theory and practice. 1st ed. Dar Al-Kutub Al-Ilmiyah. 2019.
  28. 28. Mengel K, Kirkby EA. Principles of plant nutrition. Dordrecht: Kluwer Academic Publishers. 2001. p. 849. https://doi.org/10.1007/978-94-010-1009-2
  29. 29. Al-Jaf IHM, Al-Jubouri KAA. Effect of genotypes and potash spraying in the yield and quality of the cucumber (Cucumis sativus L.). Anbar J Agric Sci. 2017;15(2):26-37. https://doi.org/10.32649/aagrs.2017.143617
  30. 30. Augustien N. Effect of KCL fertilizer doses on growth and yield of tomato (Lycopersicum esculentum Mill) plant in polybags. J Inf Sains. 2024;14(1):1087-98. https://doi.org/10.54209/infosains.v14i01
  31. 31. Mohammed MH, Abd-Alrahman HA, Abdel-Kader HH, Aboud FS. Effect of potassium humate and levels of potassium fertilization on growth, yield and nutritional status of tomato plants. J Hortic Sci Ornamental Plants. 2021;13(2):124–33.
  32. 32. Çolpan E, Zengin M, Özbahçe A. The effects of potassium on the yield and fruit quality components of stick tomato. Hort Environ Biotechnol. 2013;54(1):20–28. https://doi.org/10.1007/s13580-013-0080-4
  33. 33. Behera BC, Singdevsachan SK, Mishra HRR, Dutta SK, Thatoi HN. Diversity mechanism and biotechnology of phosphate solubilizingmicroorganism in mangrove a review. Biocatal Agric Biotechnol. 2014;3(2):97-110. https://doi.org/10.1016/j.bcab.2013.09.008
  34. 34. Kadim MM. Effect of Powhumus spring on growth and yield of tomato plant (Lycopersicon esculentum Mill.). Al-Kufa J Agric Sci. 2012;4(2):41–50.
  35. 35. Radhia IM, Talibb H. Effect of spraying salicylic acid and potassium on sweet pepper growth under water stress. J Univ Babylon Pure Appl Sci. 2018;26(8):41-52. https://doi.org/10.29196/jubpas.v26i8.1656
  36. 36. Al-Hamdany SA, Mohammad HA, Jawad NH. Effect of shading and spraying potassium on growth and yield of cucumber Mohannad cultivar. Diyala Agric Sci J. 2019;11(1):95–105. https://doi.org/10.52951/dasj.19110109

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