Abstract
The tomato (Solanum lycopersicum) is a crop that is characterized by considerable nutrient export because of its intensive growth, development, fruiting, and high biomass production. The purpose of this study is to determine how single-dose and split potassium fertilization impact the overall amount of nitrogen, potassium, and phosphorus exported from soils during crop harvest. A field experiment was carried out on Fluvosol (FAO, ISRIC World Soils) with K2O content of 20.3 mg/100g, P2O5 content of 5.8 mg/100g, and mineral N of 19.6 mg/kg. It was found that the biological yield and N, P2О5 and K2O nutrient export are significantly influenced by planting time and potassium fertilization treatments. Higher tomato fruit and biomass yields (61878.9 and 27184.9 kg/ha), along with higher nutrient export rates were observed in mid-early tomato plants. The highest yield and total N, K2O and P2O5 export from the soil was measured at split potassium (К80+80+80) fertilization treatment. A positive linear correlation between yield quantity and nutrient export was observed. The biological yield and nutrient export were shown to be significantly impacted by potassium fertilization (P<0.05).
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