Tomato yield components in variation of quantity of macroelements added by fertigation

Zbog duge vegetacije i visokog potencijala rodnosti rajčica je kultura visokih zahtjeva za biljnim hranivima. Neodgovarajuća gnojidba dovodi do pojave fizioloških poremećaja te smanjenja količine i kvlitete prinosa. Stoga se temeljem razine opskrbljenosti tla hranivima i potrebama biljke, fertirigacijom dodaju potrebne količine hraniva. Slijedom navedenog, provedeno je istraživanje sa ciljem definiranja optimalnih količina makroelemenata dodanih fertirigacijom potrebnih za ostvarenje visokog i kvalitetnog prinosa. Fertirigacijom su uz kontrolu prihranjivanu preporučenim količinama makroelemenata dodane i povećane količine fosfora, kalcija i kalija. Količina dodanih makroelemenata za potrebe pokusa povećana je za 75 %.Variranjem količine navedenih makroelemenata želio se utvrditi njihov utjecaj na prinos i masu grozdova te obojenost plodova. Između tretmana nisu utvrđene značajne razlike u prinosu plodova ubranih sa pojedinog grozda. Najveći ukupni prinos (2,75 kg/biljci), statitstički značajno veći prinos od ostalih tretmana ostvarile su biljke prihranjivane povećanom koncentracijom kalija, dok je staitstički najmanji tržni prinos (2,3 kg/biljci) utvrđen je na kontrolnim biljkama. Tretmani se nisu značajno razlikovali po udjelu netržnih plodova koji je bio u rasponu od 6,00 do 6,52 %. Najveći intenzitet obojenosti utvrđen je kod plodova ubranih sa biljaka uzgajanih uz primjenu povećane koncentracije kalija.Due to the long growing period and high yield potential, tomatoes are a crop with high requirements for plant nutrients. Inadequate fertilization leads to the appearance of physiological disorders and a decrease in the quantity and quality of yield. Therefore, based on the level of soil nutrient supply and plant needs, the required amounts of nutrients are added by fertigation. Consequently, a study was conducted with the aim of defining the optimal amounts of macronutrients added by fertigation, required to achieve high and quality yield. In addition to the control fertigated with the recommended amounts of macroelements, increased amounts of phosphorus, calcium and potassium were added by fertigation. The amount of added macronutrients for the purposes of the experiment was increased by 75%. By varying the amount of these macronutrients, their impact on the yield and weight of clusters and fruit color was determined. No significant differences were found between treatments in the yield of fruits harvested from individual clusters. The highest total marketable yield (2.75 kg/plant) significantly higher than yield achieved with other treatments was achieved by plants fertigated with increased potassium concentration. Statistically, the lowest marketable yield (2.3 kg/plant) was determined on control plants. Treatments did not differ significantly in the share of non-marketable fruits, which ranged from 6.00 to 6.52%. The highest intensity of coloration was found in fruits harvested from plants grown with the application of increased potassium concentration