QUALITY OF TOMATO FRUITS DEPENDING ON FERTIGATION WITH NITROGEN FERTILIZERS AND LEAF FERTILIZATION WITH TRACE ELEMENTS
The data of five years of experience in the study of fertigation of tomatoes with nitrogen fertilizers in the open ground in combination with leaf fertilization with trace elements are presented. In the experiment, the hybrid Katenka was sown. The application of mineral fertilizers with irrigation water and leaf fertilization were carried out in accordance with the scheme of the experiment. As a result of the evaluation of taste, color and general appearance, tomatoes with fertigation with calcium nitrate + ammonium chloride received the highest score of 4.7 out of 5.0 possible organoleptic indicators. The least number of fruits affected by apical rot, the highest content of soluble solids, better durability and storability of the fruits was noted on option (Fertigation of calcium nitrate to the phase flowering-fruit formation (1-4 fertigation), fertigation of calcium nitrate and ammonium chloride, starting from the phase flowering-fruit formation + one foliar application of NPK 20-20-20+microelements in the active growth phase + one foliar application 12-6-36 NPK+Mg+S+trace elements in the phase flowering - fruit formation). The lowest amount of nitrates in fruits was found in the variant (Fertigation with calcium nitrate before the flowering phase-fruit formation (1-4 fertigations), fertigation with calcium nitrate and ammonium chloride, starting from the flowering phase-fruit formation (75% N from calcium nitrate and 25% N from ammonium chloride)