GROWTH AND DEVELOPMENT OF TOMATO UNDER INTEGRATED FERTILIZATION SYSTEM

Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 88 DOI: https://10.5281/zenodo.18064170 UDK:631.8.81. GROWTH AND DEVELOPMENT OF TOMATO UNDER INTEGRATED FERTILIZATION SYSTEM Kuziev Jakhongir Madaminovich Institute of Soil Science and Agrochemical Research Tashkent city, Kamarniso street, house 3. E-mail: [email protected] ABSTRACT This article highlights the dynamics of macroand microelements (N, P, K, Ca, Mg, Cu, Zn, Mn, B, Mo, Co) in tomato crops under the integrated fertilization system, based on a review of scientific literature. Among macronutrients, nitrogen, phosphorus, and potassium play a crucial role in yield formation, while micronutrients such as copper, zinc, manganese, boron, molybdenum, and cobalt are essential for photosynthesis, enzyme activity, flowering, and fruit development. According to the analysis, the integrated fertilization system improves the uptake of both macroand micronutrients, increases yield by 15-20%, and enhances quality indicators by 10-15%. Keywords: Integrated fertilization system, macroand micronutrients, tomato, growth and development, quality indicators, effect. INTRODUCTION Tomato (Solanum lycopersicum L.) is one of the most widely cultivated vegetable crops worldwide. Its importance lies not only in economic terms but also in its nutritional and biological value. Tomato fruits are rich in essential vitamins (C, E, K, B group), minerals, antioxidants, and bioactive compounds that play a crucial role in preventing cardiovascular diseases, strengthening the immune system, and promoting a healthy lifestyle. Therefore, the global demand for tomatoes has been steadily increasing [1, 2, 10]. According to FAO (2023), global tomato production has exceeded 190 million tons. China is the leading producer, accounting for nearly 35-40% of total production. Other major producers include India, the USA, Turkey, Egypt, Italy, and Spain. Average yields vary across countries: in regions applying advanced agrotechnologies, Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 89 yields reach 60-80 t/ha, whereas under traditional practices, they remain around 25-35 t/ha [3, 4]. Uzbekistan is also among the important tomato-producing countries. The annual production amounts to about 3-3.5 million tons, with Tashkent, Samarkand, the Fergana Valley, and Kashkadarya being the main producing regions. The average yield is 35-40 t/ha, and in farms applying modern technologies, it reaches up to 60 t/ha. Tomatoes in Uzbekistan are strategically important not only for domestic consumption but also for processing and export. Therefore, maintaining soil fertility, improving fertilization systems, and ensuring sustainable production are of great significance [16, 17, 18]. One of the main factors determining tomato yield and fruit quality is soil fertility and the balanced availability of nutrients. Among the macronutrients, nitrogen (N), phosphorus (P), and potassium (K) are the most critical. Nitrogen plays a key role in leaf and stem biomass formation, chlorophyll synthesis, and photosynthesis. Phosphorus enhances root development, energy metabolism, and accelerates flowering and fruit formation. Potassium regulates water balance, carbohydrate and sugar accumulation, and improves fruit quality and storability. In addition, micronutrients such as copper (Cu), zinc (Zn), manganese (Mn), boron (B), molybdenum (Mo), cobalt (Co), as well as calcium (Ca), magnesium (Mg), sulfur (S), and iron (Fe) play important roles in tomato physiology and fruit quality [3, 4]. However, excessive or unbalanced application of mineral fertilizers often leads to nutrient deficiencies or toxicities, which negatively affect yield and increase environmental risks. For this reason, integrated fertilization systems have been increasingly applied in recent years. The main objective of integrated fertilization systems is to maintain soil fertility, increase the efficiency of mineral fertilizers, and obtain high and high-quality yields from crops. In this system, the balanced application of macroand micronutrients plays a decisive role. Nitrogen, phosphorus, and potassium are key for plant growth, development, and fruit formation, while calcium, magnesium, and sulfur influence stable biochemical processes and fruit quality. At the same time, micronutrients such as copper, zinc, manganese, boron, molybdenum, and cobalt are critical for photosynthesis, enzyme activity, flowering and fruit setting, nitrogen metabolism, and enhancing plant immunity. Organic fertilizers serve as a source of humus and micronutrients, while mineral fertilizers provide the main macronutrients. As a result, macronutrients determine yield quantity, while micronutrients ensure fruit quality and sustainable development. Scientific studies have shown that integrated fertilization increases mineral fertilizer efficiency by 15-20%, while micronutrient application Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 90 enhances tomato yield by 10-15% and improves the content of vitamins and minerals in the fruit [6, 15]. From this perspective, studying nutrient uptake dynamics in tomatoes across growth stages has significant scientific and practical importance. Particularly, under integrated fertilization conditions, clarifying the interactions between macroand micronutrients and their effects on physiological and biochemical processes is one of the key factors for improving yield and quality. The aim of this article is to summarize the dynamics of nutrient elements in tomato cultivation and the efficiency of integrated fertilization systems, as well as to develop scientifically grounded recommendations for sustainable production. Nitrogen (N) dynamics: Nitrogen is one of the essential macronutrients for tomato growth and development. It participates in chlorophyll synthesis, protein and enzyme formation, and directly influences photosynthesis and total biomass accumulation [10, 15]. According to literature, sufficient nitrogen supply in the early growth stages increases vegetative mass, while excess nitrogen fertilization leads to excessive leaf growth and reduced fruit yield. Therefore, in the integrated fertilization system, nitrogen rates must be optimized according to the plant growth stage and soil conditions [3, 10]. Numerous studies have investigated the dynamics of mobile nitrogen forms in soil (NH₄⁺ and NO₃⁻). Particularly under irrigated conditions, nitrogen mineralization is intensive, while denitrification and leaching losses are high. Hence, applying nitrogen not only as a basal dose but also fractionally during the growing season ensures higher efficiency. For tomato cultivation, the optimal nitrogen rate is generally recommended at 150-250 kg/ha. However, some studies report that when combined with organic materials (compost, fermented manure) in integrated systems, nitrogen uptake increases by 20-25%. Adequate nitrogen supply improves protein content in fruits, enhances vitamin C, lycopene, and sugar accumulation. At the same time, excess nitrogen increases nitrate accumulation in fruits, which poses ecological and health risks [3, 4, 10, 15]. Phosphorus (P) dynamics: Phosphorus plays a vital role in root system development, energy metabolism (ATP), nucleic acid synthesis, and membrane structures. It is especially critical in the early growth phases, strongly influencing root activity and flower bud formation. Literature analysis shows that sufficient phosphorus supply maintains the balance between vegetative and generative organ development in tomato plants. Phosphorus deficiency slows root growth, delays flowering, and reduces fruit yield. Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 91 Studies demonstrate that phosphorus fertilization increases the content of available P₂O₅ in soil, but its uptake varies depending on growth stages. For instance, phosphorus absorption is relatively low during early growth stages but intensifies rapidly during flowering and fruit setting [3, 4, 10, 15]. In integrated fertilization systems, applying phosphorus together with organic materials reduces its fixation in soil and ensures more availability in active forms. Some research indicates that applying phosphorus in water-soluble forms increases sugar and carotenoid content in tomato fruits. The optimal phosphorus application rate is 80-120 kg/ha. Higher doses often do not provide additional yield benefits and may be economically and environmentally inefficient. Potassium (K) dynamics: Potassium plays a key role in regulating water balance, maintaining osmotic pressure, enzyme activity, and photosynthesis. It is especially crucial during fruit formation and ripening stages [3, 4, 10, 15]. According to literature, potassium deficiency causes leaf chlorosis, marginal necrosis, and reduces photosynthetic efficiency. In such conditions, tomato fruits become small, irregular in shape, and of poor taste quality. When potassium is sufficiently supplied, sugar levels in fruits increase, while lycopene and carotenoid accumulation is enhanced. This improves fruit quality and marketability. Studies reveal that potassium dynamics in soil depend on plant growth stages. During vegetative growth, potassium demand is relatively low, whereas during flowering and fruit formation, uptake increases rapidly. Therefore, in integrated fertilization systems, most potassium should be applied before fruit setting. Applying potassium fertilizers together with organic materials improves soil salt balance and accelerates K⁺ uptake by plants. Some studies have shown that combined application of potassium with micronutrients (boron and magnesium) significantly enhances tomato fruit quality. The optimal potassium rate for tomato cultivation is 180-240 kg/ha. At this level, both yield and quality indicators are maximized [3, 4, 10, 15]. Copper (Cu) dynamics: Copper is a structural component of plastocyanin protein, which participates in the photosynthetic process. It also plays a key role in lignin synthesis, enzyme activity, and enhancing plant resistance to stress factors [13, 14]. According to literature, copper deficiency in tomato plants causes leaf chlorosis, growth retardation, and reduced flowering. Under sufficient micronutrient supply (balanced micronutrient availability – the most favorable agrochemical condition for plant growth), yield quality indicators improve, and sugar and carotenoid content in fruits increases. Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 92 Zinc (Zn) dynamics: Zinc is involved in auxin synthesis, protein metabolism, and enzyme activity. Adequate zinc levels enhance photosynthetic efficiency and stimulate growth [5, 7, 8]. In tomatoes, zinc deficiency results in leaf chlorosis and “rosette” formation. Research shows that zinc application increases vitamin C and sugar content in fruits, thus improving their quality. Manganese (Mn) dynamics: Manganese participates in water-splitting reactions during photosynthesis and activates various enzyme systems [8, 9]. In soils deficient in manganese, black spots and interveinal chlorosis appear on leaves. Application of Mn as a micronutrient enhances photosynthesis and increases yield. Boron (B) dynamics: Boron is one of the key micronutrients in tomato flowering and fruit set. It plays a vital role in cell wall structure and carbohydrate translocation [9, 13]. Boron deficiency causes flower drop and the development of “dry rot” (blossom end rot) in fruits. Literature indicates that boron fertilization increases sugar content in fruits and improves their quality. Molybdenum (Mo) dynamics: Molybdenum is essential for the activity of nitrate reductase enzyme, which reduces nitrates to ammonium [14]. In its deficiency, nitrate accumulation in tomatoes increases, and growth is slowed. Application of molybdenum improves nitrogen metabolism and enhances yield. Cobalt (Co) dynamics: Cobalt is involved in the structure of vitamin B₁₂ and nitrogen metabolism. It also increases plant tolerance to stress factors [13, 14]. Literature suggests that cobalt application in tomato cultivation accelerates flowering and improves fruit quality parameters. Theoretical Background and Literature Review: Scientific research on the dynamics of macroand microelements in tomatoes is based on long-term experiments and analyses. Foundational works in the field of mineral nutrition and element physiology include those of Marschner, Epstein & Bloom, Mengel & Kirkby, and Fageria, which provided the theoretical basis for understanding the effects of macroand microelements on plant growth, development, and yield quality. Studies on microelements, particularly the works of Alloway (zinc), Cakmak (biofortification), Shukla (boron), and Rengel (Mn, Zn, Fe), highlight the role of trace elements in tomato physiology and enzymatic activity. These investigations also demonstrated how microelements affect fruit quality and productivity, thereby providing a scientific foundation for integrated fertilization systems. Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 93 On the subject of integrated and complex fertilization, research by Savvas & Gruda (modern technologies), White & Brown (sustainability and global health), and Fageria (element interactions) is of great importance. Their studies showed that the combined application of mineral and organic fertilizers helps maintain soil fertility, improves nutrient use efficiency, and ensures sustainable productivity [11, 12]. Local scholars such as Yuldashev, Tursunov, Saparov, Ergashev, Hamroev have contributed valuable data on the dynamics of microelements, the optimal rates of nitrogen, phosphorus, and potassium, as well as the effectiveness of integrated fertilization systems under the soil and climatic conditions of Uzbekistan. Conclusion and Recommendations: The literature review indicates that the growth and development of tomatoes under an integrated fertilization system directly depend on the supply levels of macroand microelements. Proper application of nitrogen, phosphorus, and potassium ensures a balanced progression of vegetative and generative phases. Nitrogen plays a decisive role in growth and biomass formation; phosphorus enhances root system development and flowering; while potassium regulates water balance and improves fruit quality. Microelements (Cu, Zn, Mn, B, Mo, Co) stimulate photosynthesis, enzyme activity, energy metabolism, and fruit formation processes. Their deficiency can lead to physiological disorders and reduced quality. Research findings also show that the proper application of microelements increases the sugar, vitamin, and carotenoid content in fruits while reducing nitrate accumulation. Recommendations: Integrated fertilization systems should consider the balance of macroand microelements; Nitrogen fertilizers are best applied in split doses, aligned with plant growth phases; The main share of phosphorus and potassium should be supplied before flowering and fruit formation for maximum efficiency; Microelements such as Cu, Zn, Mn, B, Mo, and Co should be applied at optimal rates to enhance yield and product quality. Thus, maintaining the balance of macroand microelements in an integrated fertilization system is one of the key agrotechnical factors for achieving high and sustainable tomato productivity. Conclusion and Recommendations: Based on the literature review, it has been established that the growth and development of tomatoes under an integrated fertilization system directly depend on the supply levels of macroand microelements. The optimal application of nitrogen, phosphorus, and potassium ensures a balanced transition between vegetative and generative phases. Nitrogen plays a key role in Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 17 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal December, 2025 94 growth and biomass formation; phosphorus is essential for root system development and flowering; while potassium regulates the water regime and fruit quality. Microelements (Cu, Zn, Mn, B, Mo, Co) stimulate photosynthesis, enzyme activity, energy metabolism, and fruit formation processes. Their deficiency may cause various physiological disorders and lead to a decline in product quality. Studies also show that the proper application of microelements increases the content of sugars, vitamins, and carotenoids in fruits, while reducing nitrate accumulation. Recommendations: Integrated fertilization systems should maintain the balance of macroand microelements; Nitrogen fertilizers should be applied in split doses, aligned with plant growth phases; The major portion of phosphorus and potassium should be applied before flowering and fruit formation stages for higher efficiency; Microelements such as Cu, Zn, Mn, B, Mo, and Co should be applied at optimal rates to improve yield and product quality. Thus, maintaining the balance of macroand microelements in an integrated fertilization system is one of the most important agrotechnical factors for achieving high and sustainable tomato yields. REFERENCES: 1. Marschner H. (2012). Marschner’s Mineral Nutrition of Higher Plants (3rd ed.). Academic Press, London. 651 p. 2. Epstein E., & Bloom A.J. (2005). Mineral Nutrition of Plants: Principles and Perspectives (2nd ed.). Sinauer Associates, Sunderland, MA. 400 p. 3. Mengel K., & Kirkby E.A. (2001). Principles of Plant Nutrition (5th ed.). 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